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Encyclopedia results for Public key certificate

Public key certificate





Encyclopedia results for Public key certificate

  1. Public key certificate

    usage of digital certificate In cryptography , a public key certificate also known as a digital certificate or identity certificate is an electronic document which uses a digital signature to bind a public key with an identity &mdash information such as the name of a person or an organization, their address, and so forth. The certificate can be used to verify that a public key belongs to an individual. In a typical public key infrastructure PKI scheme, the signature will be of a certificate authority CA . In a web of trust scheme, the signature is of either the user a self signed certificate or other users endorsements . In either case, the signatures on a certificate are attestations by the certificate signer that the identity information and the public key belong together. For provable security this reliance on something external to the system has the consequence that any public key certification scheme has to rely on some special setup assumption, such as the existence of a certificate ... External links http www.ietf.org rfc rfc5280.txt RFC 5280 Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List CRL Profile Category Public key cryptography Category ... valid from. Valid To The expiration date. Key Usage Purpose of the public key e.g. encipherment, signature, certificate signing... . Public Key The public key. Thumbprint Algorithm The algorithm used to Cryptographic hash function hash the public key. Thumbprint The hash itself, used as an abbreviated form of the public key. Classification Vendor defined classes VeriSign uses the concept of classes ... signs the request, thus producing a public certificate. During web browsing, this public certificate ..., the certificate provider will request the contact email address for the web site from a public ... certificate, even if that certificate has a lower number of key bits, even if it lacks Extended Validation ... described above, web sites secured by public key certificates are still more secure than unsecured ...   more details



  1. Public key fingerprint

    In public key cryptography , a public key fingerprint is a short sequence of bytes used to authenticate or look up a longer public key . Fingerprints are created by applying a cryptographic hash function to a public key. Since fingerprints are shorter than the keys they refer to, they can be used to simplify certain key management tasks. Creating public key fingerprints A public key fingerprint is typically created through the following steps A public key and optionally some additional data is encoded ... public key. For example, whereas a typical RSA algorithm RSA public key will be 1024 bits in length ... key fingerprints for key authentication details key authentication When a public key is received ... a public key as belonging to Bob, she can contact Bob over the phone or in person and ask him to read ... then check that this trusted fingerprint matches the fingerprint of the public key. Exchanging and comparing ... in a database where the size of a full public key is a problem, then exchanging or storing fingerprints ... the exchange of public key fingerprints over voice channels. Public key fingerprints in practice In systems ... with that user can be automatically authenticated. In systems such as X.509 based public key ... bits respectively of a key fingerprint. PGP uses key IDs to refer to public keys for a variety ... from being able to securely authenticate a public key. Security of public key fingerprints The primary ... pair whose public key hashes to a fingerprint which matches the victim s fingerprint. The attacker could then present his public key in place of the victim s public key to masquerade as the victim. A secondary ... cryptography navbox public key Category Public key cryptography de Schl ssel Kryptologie Schl ssel ... must be deterministic, and any additional data must be exchanged and stored alongside the public key. The additional data is typically information which anyone using the public key should be aware of. Examples of additional data include which protocol versions the key should be used with in the case ...   more details



  1. Public-key cryptography

    hierarchy must be considered when deploying public key systems. Some certificate authority usually ... private keys by producing a digital certificate. Digital certificate Public key digital certificates ..., the correctness of the public key when it issues a certificate, and has made arrangements with all ... authority into issuing a certificate for a bogus public key could then mount a man in the middle ... or confused. On one hand, a message revoking a public key certificate should be spread ... authority and under what conditions to revoke a public key certificate, how to spread the revocation ...copy edit date October 2011 File Public key crypto 1.svg thumb 250px right An unpredictable typically ... scheme, anyone can encrypt messages using the public key, but only the holder of the paired private key can decrypt. Security depends on the secrecy of that private key. Image Public key signing.svg ... sign a message anyone can check the signature using the public key. Validity depends on security of the private key. Image Public key shared secret.svg thumb 250px right In the Diffie Hellman key exchange scheme, each party generates a public private key pair and distributes the public key... After ... symmetric cipher . Public key cryptography refers to a cryptography cryptographic system requiring two ... the cyphertext . Neither key will do both functions. One of these keys is published or public and the other ... private communication from the public to the unlocking key s owner. If the unlock decryption key is the one ... have the public key private key property that is, neither key is derivable from knowledge .... br Although unrelated, the two parts of the key pair are mathematically linked . The public key ... private key. By publishing the public key, the key producer empowers anyone who gets a copy of the public key to produce messages only s he can read because only the key producer has a copy ... recipient s public key to decrypt the message, the recipient uses the private key. No one else ...   more details



  1. Public-key infrastructure

    public key s with respective user identities by means of a certificate authority CA . The user identity ... public key infrastructure SPKI . citation needed date January 2012 Certificate authorities The primary role of the CA is to digitally sign and publish the public key bound to a given user. This is done ... of public key information is the web of trust scheme, which uses self signed public key certificate ...Image Public Key Infrastructure.svg thumb 300px Diagram of a public key infrastructure A public key infrastructure ... freeabs all.jsp?arnumber 4737164 LPKI A Lightweight Public Key Infrastructure for the Mobile Environments ... Authority RA . The RA ensures that the public key is bound to the individual to which it is assigned ... http books.google.com books?id ERSfUmmthMYC&pg PA11 ref A public key infrastructure PKI is a system ... public key belongs to a certain entity. The PKI creates digital certificates which map ... oswvyhAftLsC&pg PA69 ref ref name Vacca 2004 p8 cite book author Vacca, Jhn R. title Public key infrastructure ... task of setting up a public key infrastructure work Network World date January 17, 2001 url ... publication of public key information, it is relatively easy to implement one s own web of trust ... public keys. Simple public key infrastructure Another alternative, which does not deal with public authentication of public key information, is the simple public key infrastructure SPKI that grew out ... needed date January 2012 History The public disclosure of both secure key exchange and asymmetric ... channel a security association uses asymmetric key a.k.a. public key methods, whereas actual communication ... and Technology NIST is attempting to develop a public key infrastructure http www.schneier.com paper pki.html Ten Risks of PKI What You re Not Being Told About Public Key Infrastructure by C ... navbox public key DEFAULTSORT Public key infrastructure Category Public key cryptography Category Key management ar bg PKI cs PKI de Public Key Infrastruktur es ...   more details



  1. Simple public-key infrastructure

    Simple public key infrastructure SPKI , pronounced spoo key was born out of a joint effort to overcome the overcomplication and scalability problems of traditional X.509 public key infrastructure . It is specified in two Internet Engineering Task Force IETF Request For Comments RFC specifications RFC 2692 and RFC 2693 from the IETF http www.ietf.org html.charters spki charter.html SPKI working group . These two RFCs are at the EXPERIMENTAL maturity level of the IETF s Request for Comments Status RFC status . The SPKI specification defines an authorization certificate format, providing for the delineation of privileges, rights or other such attributes called authorizations and binding them to a public key. In 1996, SPKI was merged with Simple Distributed Security Infrastructure SDSI , pronounced sudsy by Ron Rivest and Butler Lampson . History and Overview The original SPKI had identified principals only as public key s but allowed binding authorizations to those keys and delegation of authorization from one key to another. The encoding used was attribute value pairing, similar to RFC 822 headers. The original SDSI bound local names of individuals or groups to public keys or other names , but carried authorization only in Access Control List s ACLs and did not allow for delegation of subsets of a principal s authorization. The encoding used was standard S expression . The combined SPKI SDSI allows the naming of principals, creation of named groups of principals and the delegation of rights or other attributes from one principal to another. It includes a language for expression of authorization a language that includes a definition of intersection of authorizations. It also ... SPKI documentation and references DEFAULTSORT Simple Public Key Infrastructure Categories Category Key management ja pl SPKI ... Certificate Authority CA . In fact, one premise behind SPKI is that a commercial CA serves no useful ...   more details



  1. Wireless Public Key Infrastructure

    Orphan date July 2011 Wireless Public Key Infrastructure WPKI is a two factor authentication scheme using mainly the mobile phone and a laptop . It is mainly promoted by banks, mobile operators, and mobile network manufacturers. External links http www.wpki.net cryptography navbox public key Category Public key cryptography Category Banking technology crypto stub ...   more details



  1. Resource Public Key Infrastructure

    Resource Public Key Infrastructure RPKI , also known as Resource Certification, is a specialized public key infrastructure PKI framework designed to secure the Internet s routing infrastructure, specifically the Border Gateway Protocol BGP . RPKI provides a way to connect Internet number resource information such as Autonomous system Internet Autonomous System numbers and IP Address IP Addresses to a trust anchor . The certificate structure mirrors the way in which Internet number resources are distributed. That is, resources are initially distributed by the Internet Assigned Numbers Authority IANA to the Regional Internet Registries RIRs , who in turn distribute them to Local Internet registry Local Internet Registries LIRs , who then distribute the resources to their customers. RPKI can be used by the legitimate holders of the resources to control the operation of Internet routing protocol s to prevent route hijacking and other attacks. Work on standardizing RPKI is currently late 2011 ongoing at the IETF in the https datatracker.ietf.org wg sidr charter sidr working group , based on a threat analysis which was documented in RFC 4593. The standards cover BGP origin validation, while ... Report Category Public key cryptography Category Routing protocols Category Internet architecture ... as Local Internet registry Local Internet Registries LIRs , to obtain a resource certificate ... it should be noted that the certificate does not contain identity information. Using the resource certificate, LIRs can create cryptographic attestations about the route announcements they authorise ... html draft ietf sidr roa validation 10 Validation of Route Origination using the Resource Certificate ... www.rpki.net open source tools available to run the Certificate Authority and manage the resource certificate and child objects such as ROAs. In addition, the RIRs have a hosted RPKI platform available .... In practice this means that when running a Certificate Authority, an LIR can either publish all ...   more details



  1. Public Key Name Service

    Cleanup date August 2008 The Public Key Name Service PKNS is an award winning ref cite web author KIRA Awards url http www.kiraawards.com news 217983 title 2008 Award Winners date 2008 05 08 accessdate 2008 08 26 ref technology which stores and authenticates trust linkages. ref cite web author CRN Online url http crncanada.ca index.php?page shop.product details&flypage shop.flypage&product id 1909&category id 75&manufacturer id 0&option com virtuemart&Itemid 56&vmcchk 1 title TrustMe Introduces Security Application For Online Communication accessdate 2008 08 26 ref The PKNS is accessible via a REST based API which enables applications and web sites to secure communications and interactions by authenticating trust linkages. The PKNS supports both XML and JSON response formats. ref cite web author TMC url http opensourcepbx.tmcnet.com topics development tools articles 28831 trustme api enables safe secure online communication.htm title TrustMe API Enables Safe, Secure Online Communication date 2008 05 22 accessdate 2008 08 26 ref Access to the PKNS is provided free using the TrustMe API. ref cite web author CrunchBase url http www.crunchbase.com company trustme title TrustMe Company Profile accessdate 2008 08 26 ref Open Protocol Support On July 23, 2008, TrustMe Security announced, at the Facebook F8 Conference in San Francisco , that it was converting the PKNS to provide compatibility with OAuth . ref cite web author Reuters url http www.reuters.com article pressRelease idUS96701 23 Jul 2008 BW20080723 title TrustMe Announces Support for OAuth Open Protocol date 2008 07 23 accessdate 2008 08 26 ref Advantages The Public Key Name Service is notable because it addresses key deficiencies of hosted communication encryption services which have been criticized because the message remains stored on the provider s servers. PKNS also alleviates problems associated with manually exchanging encryption keys using other encrypted communications technologies like Pretty Good Privacy ...   more details



  1. Certificate

    wikt certificate Certificate may refer to Public key certificate , an electronic document used in cryptography Certificate of deposit , or CD, a financial product commonly offered to consumers by banks, thrift institutions, and credit unions Certificate complexity , a string that certifies the answer to a computation Medical certificate Official document Birth certificate Marriage certificate Stock certificate Death certificate Academic qualification Academic certificate Professional certification , a vocational award A confirmation that a person has passed a Test assessment to prove competence Australia Higher School Certificate New South Wales , a school qualification in New South Wales, Australia Victorian Certificate of Education , a school qualification in Victoria, Australia Technical and further education Qualifications awarded by TAFE colleges , a qualification offered by an education institution in Australia Ireland Junior Certificate , a qualification attained by school students Irish Leaving Certificate , a higher qualification attained by school students National Certificate , an older higher education qualification Higher Certificate , a newer higher education qualification Hong Kong Hong Kong Certificate of Education Examination United Kingdom Certificate of Higher Education , awarded after one year full time study at a university or other higher education institution See also Certification Academic degree Motion picture rating system disambig cs Certifik t de Zeugnis eo Atesto fr Certificat hr Certifikat it Certificato ka lt Liudijimas nl Certificaat verklaring ja pl Certyfikat ru sq Certifikata scn Certificatu simple Certificate sk Certifik t uk ur zh ...   more details



  1. Efficient Probabilistic Public-Key Encryption Scheme

    EPOC Efficient Probabilistic Public Key Encryption is a probabilistic encryption probabilistic Public key cryptography public key encryption scheme. EPOC was developed in 1999 by T. Okamoto, S. Uchiyama and E. Fujisaki of Nippon Telegraph and Telephone NTT Labs in Japan. It is based on the random oracle model, in which a primitive public key encryption function is converted to a secure encryption scheme by use of a truly random hash function the resulting scheme is designed to be Semantic security semantically secure against a chosen ciphertext attack . EPOC s primitive encryption function is the OU Okamoto Uchiyama function, in which to invert the OU function is proven to be as hard as factoring a composite integer public key. There are three versions of EPOC EPOC 1 uses a one way trapdoor function and a random function hash function EPOC 2 uses a one way trapdoor function, two random functions hash functions and a symmetric key encryption e.g., one time padding and block ciphers EPOC 3 uses the Okamoto Uchiyama one way trapdoor function and two random functions hash functions as well as any symmetric encryption scheme such as the one time pad, or any classical block cipher. EPOC 1 is designed for key distribution EPOC 2 and EPOC 3 are designed for both key distribution and encrypted data transfer. See also Cryptography Computational complexity theory Okamoto Uchiyama cryptosystem References T. Okamoto, S. Uchiyama and E. Fujisaki 1999 . http grouper.ieee.org groups 1363 StudyGroup NewFam.html OUF EPOC Efficient Probabilistic Public Key Encryption , Contribution to IEEE describes EPOC 1 and EPOC 2. T. Okamoto and D. Pointcheval 2000 . http grouper.ieee.org groups 1363 StudyGroup NewFam.html epoc3 EPOC 3 Efficient Probabilistic Public Key Encryption Version 2 , Contribution to IEEE describes EPOC 3. cite journal author T. Okamoto S. Uchiyama title A New Public key Cryptosystem ... 7 Cryptography navbox public key Category Public key encryption schemes ...   more details



  1. The Certificate

    Unreferenced stub auto yes date December 2009 Image certificate book.jpg thumb 200px The Certificate book cover The Certificate is a novel by Isaac Bashevis Singer , published in English language English in 1992 published in Yiddish in 1967 . David, a poor, young Yiddish writer wishes to emigrate to Palestine from Poland , and because married couples are given preference, he tries to arrange for a marriage certificate to be purchased for him by a wealthy woman whose fiancee lives in Palestine. The narrative deals with the abject poverty of David, as well as his Jewish heritage, and details the rise of both Communism and Zionism . IsaacBashevisSinger DEFAULTSORT Certificate, The Category 1967 novels Category Jewish literature Category Novels by Isaac Bashevis Singer 1960s novel stub ...   more details



  1. Trust certificate

    Trust certificate may refer to Public key infrastructure Trust Certificate finance disambiguation Short pages monitor This long comment was added to the page to prevent it being listed on Special Shortpages. It and the accompanying monitoring template were generated via Template Longcomment. Please do not remove the monitor template without removing the comment as well. ...   more details



  1. Certificate server

    Certificate servers validate, or certify, Public key keys as part of a Public key infrastructure . Keys ... Certificate based encryption Public key infrastructure Public key certificate X.509 References references DEFAULTSORT Certificate Server Category Internet Category Public key cryptography Category Key ... a program or a sender s public key, or to initiate Secure Sockets Layer SSL sessions. It must be signed by a certificate authority CA to be valid. X.509 Description The Internet Engineering Task Force RFC 2459, entitled Internet X.509 Public Key Infrastructure Certificate and CRL Profile , describes the protocols for the X.509 X.509 v3 certificate and Certificate revocation list X.509 v2 Certificate revocation list as a part of the Internet PKI. According to the RFC, The goal of this specification ... PKI allow the owner of a public key to be certain that a private key is owned by the correct person, via the use of public key certificates digitally signed by a certificate authority. ref cite web last Internet Engineering Task Force first Network Working Group title Internet X.509 Public Key Infrastructure Certificate and CRL Profile url http www.ietf.org rfc rfc2459.txt date January 1999 accessdate 2009 04 21 ref Implementation using Microsoft IIS Microsoft s Certificate Services on IIS allows ... users before they transmit information. A digital certificate is a password protected, encrypted ... certificate server in one of four configurations as Certificate authorities . Enterprise root CA Enterprise subordinate CA Stand alone root CA Stand alone subordinate CA Management of Certificate Services ... Microsoft, Inc. first title Managing Microsoft Certificate Services and SSL url http technet.microsoft.com ... There exist several open source implementations of certificate servers, commonly referred to as a CA or Certificate Authority . Common for all is that they provide the services to issue, revoke and manage ... an SSL TLS library, but comes with tools to use it as a simple certificate authority. Implementation ...   more details



  1. Implicit certificate

    Orphan date February 2009 In cryptography , implicit certificates are a variant of public key certificate , such that a public key can be reconstructed from any implicit certificate, and is said then to be implicitly ... certificates are made up of three parts identification data, a public key and a digital signature which binds the public key to the user s identification data ID . The digital certificate is created ... Authority s CA s signature on a certificate. Instead, a user computes a public key from the implicit certificate and simply uses it in the intended ECC operation, e.g. key agreement protocols such as ECDH ... . The Certificate Authority CA will have private key math c , math and public key math Q CA cG , math ... alpha s pmod n , math Alice s public key is math Q A e gamma Q CA , math Computing the public key from the implicit certificate Computing Alice s public key math Q A , math can be computed by any third ... of the implicit certificate math gamma , math is the same size as Alice s public key math ... public key certificates include a copy of the public key and the digital signature of the certification authority. Upon verification of the digital signature, the public key is explicitly verified, in the sense that the party identified in the certificate knows the associated private key and is the only party who can know the private key. Unlike an implicit certificate, there is no possibility ... and a public key a key pair can subsequently be used for key exchange to set up secured communications .... The public key, ID and digital signature are distinct data elements which make the up the physical ... ID, public key and digital signature but the data elements are super imposed into a string the size of the public key. For example using an elliptic curve system at 160 bits would give us implicit certificates .... Thus ECQV is regarded as an implicit validation scheme. Computing the public key is very fast, much faster than a public key operation. Generating implicit certificates Initially the elliptic curve ...   more details



  1. Root certificate

    root certificates http www.cacert.org CAcert.org certificates Category Public key cryptography Category Key management ja ...Merge self signed certificate date December 2009 In cryptography and computer security , a root certificate is either an unsigned public key certificate or a self signed certificate that identifies the Root Certificate Authority CA . A root certificate is part of a public key infrastructure scheme. The most common commercial variety is based on the ITU T X.509 standard, which normally includes a digital signature from a certificate authority CA . Digital certificates are verified using a chain of trust . The trust anchor for the digital certificate is the Root Certificate Authority CA . A certificate authority can issue multiple certificates in the form of a tree structure . A root certificate is the top most certificate of the tree, the private key of which is used to sign other certificates. All certificates immediately below the root certificate inherit the trustworthiness of the root certificate a signature by a root certificate is somewhat analogous to notarizing an identity in the physical world. Certificates further down the tree also depend on the trustworthiness of the intermediates often known as subordinate certification authorities . Many software applications assume these root certificates are trustworthy on the user s behalf. For example, a Web browser uses them to verify identities within Transport Layer Security SSL TLS secure connections. However, this implies that the user trusts their browser s publisher, the certificate authorities it trusts, and any intermediates the certificate authority may have issued a certificate issuing certificate, to faithfully verify ... transitive trust in a root certificate is the usual case and is integral to the X.509 certificate chain model. The root certificate is usually made trustworthy by some mechanism other than a certificate ...   more details



  1. Certificate policy

    A certificate policy CP is a document which aims to state what are the different actors of a public key .... When in use with X.509 public key certificate certificates , a specific field can be set to include a link to the associated certificate policy. Thus, during an exchange, any relying party has an access to the assurance level associated with the certificate, and can make a decision concerning the trust metric level of trust to put in the certificate. RFC 3647 The reference document for writing a certificate policy is, as of 2010 12 lc y , RFC 3647. The RFC proposes a framework for the writing of certificate policies and certification practice statement s CPS . The points described below are based ... The different procedures for certificate application, issuance, acceptance, renewal, re key, modification ... describes what are the technical requirements regarding key sizes, protection of public key cryptography private keys by use of key escrow and various types of controls regarding the technical environment computers, network . Certificate revocation lists The revocation list CRLs are a vital ... based on certificates issued by this very same PKI. Certificate uses An important point of the certificate policy is the description of the authorized and prohibited certificate uses. When a certificate ..., a certificate can be issued for digital signature of email e mail aka S MIME , encryption of data ... sure that the CA is not take part in an identity theft . Key generation The key generation generation of the key cryptography key s is also mentioned in a certificate policy. Users may be allowed to generate their own keys and submit them to the CA for generation of an associated certificate ... with these lists, to ensure consistency between certificate status and the content of the list ... in its documents, such as the certificate policy. The procedures used to assess such regulatory compliance ... all the PKI associated legal matters. References RFC 3647 Category Key management pl Polityka certyfikacji ...   more details



  1. Wildcard certificate

    File Wildcard certificate.jpg thumb 300px right An example of a wildcard certificate on https plus.google.com note the asterisk A wildcard certificate is a public key certificate with which you can secure multiple subdomain s. ref http www.verisign.com ssl certificates wildcard ssl certificates index.html Wildcard SSL certificate on Verisign.com ref Depending on the number of subdomains an advantage could be that it saves money and also could be more convenient . Limitation Only a single level of subdomain matching is supported. ref https support.quovadisglobal.com KB a60 will ssl work with multilevel wildcards.aspx?KBSearchID 10223 Wildcard SSL certificate limitation on QuovadisGlobal.com ref It is not possible to get a wildcard for an Extended Validation Certificate . ref http www.entrust.net ssl technical ev faq.htm q19 No wildcard for an Extended Validation Certificate on Entrust.net ref A workaround could be to add every virtual host name in the subjectAltName extension. ref Server Name Indication How SNI fixes the problem The subjectAltName field ref The major problem being that the certificate needs to be reissued whenever a new virtual server is added. Thus all certificates need to be replaced every time. ref Transport Layer Security Support for name based virtual servers Need to be reissued whenever a new virtual server is added ref Example An example of the use of a .company.com wildcard could be payment.company.com, contact.company.com, subscribe.company.com, login.company.com, etc. But in order to secure fourth.payment.company.com or company.com itself, you will need another wildcard certificate. ref http tools.ietf.org html rfc2818 Single domain name in RFC 2818 on ietf.org ref See also public key certificate References references Category Public key cryptography Category Key management Category Electronic commerce http brisbane.norg.com.au 2011 06 03 secure your domain plus sub domain wildcard ssl 2 feature of wildcard ...   more details



  1. Authorization certificate

    mechanism. See also Public key certificate Security Assertion Markup Language Shibboleth Internet2 ... en Qualified electronic certificate Category Public key cryptography de Attributzertifikat ... cite paper author Farrell, S. Housley, R title An Internet Attribute Certificate Profile or Authorization version RFC 3281 ref Comparison of attribute and public key certificates AC is similar to PKC except that AC contains no public key because an AC verifier is under the control of the AC issuer, and therefore, trusts the issuer directly by having the public key of the issuer preinstalled. This means that once the AC issuer s private key is compromised, the issuer has to generate a new key pair and replaces the old public key in all verifiers under its control with the new one. In addition to the absence of a public key, AC does not refer to the holder directly using identity information ... to the attributes contained in the AC. For example, a software developer that already has a public key certificate PKC wants to deploy its software in a computing device employing Digital rights ...In computer security , an attribute certificate AC is a digital document containing attributes associated ..., AC is called authorization certificate . AC is standardized in X.509 . RFC 3281 further specifies the usage of AC for authorization purpose in the Internet. AC is the complement of public key certificate PKC . While PKC is issued by a certificate authority CA and is used as a proof of identity ... attributions. For example, an authorization certificate issued for Alice authorizes her to use ... using the PKC, for example, by asking the user to decrypt a message encrypted by the user s public key in the PKC. If the authentication is successful, the verifier will use the preinstalled public key of the AC issuer to check the validity of the presented AC. If the AC is valid, the verifier ... approved by the device manufacturer. The software developer signs the software with the private key ...   more details



  1. Certificate authority

    Public key certificate digital certificate s. The digital certificate certifies the ownership of a public key by the named subject of the certificate. This allows others relying parties to rely upon signatures or assertions made by the private key that corresponds to the public key that is certified ... certificate s that contain a public key and the identity of the owner. The matching private key is not made available publicly, but kept secret by the end user who generated the key pair. The certificate is also a confirmation or validation by the CA that the public key contained in the certificate ... can also verify that a certain public key does indeed belong to whoever is identified in the certificate. Example Public key cryptography can be used to encrypt data communicated between two parties ... by the fake public key. The fake web page will get access to the user s data since the fake web page owns the fake private key. A certificate authority is an organization that stores public keys ... receives the public key from www.bank.example it can contact the certificate authority to ask whether the public key does really belong to www.bank.example. Since www.bank.example uses a public key that the certification authority certifies, a fake www.bank.example can only use the same public ... Bob s certificate may also include his CA s public key signed by a different CA sub 2 sub , which is presumably ... Public key infrastructure Certificate revocation list Certificate server Robot certificate ... Security Public Key Infrastructure PKIX Tools and Services Third Party Certificate Authorities Certificate ... public key infrastructure PKI schemes. Commercial CAs charge to issue certificates that will automatically ... to do online banking. When the user opens www.bank.example homepage, he receives a public key along ... to the page will be encrypted by his web browser using the public key that was issued by www.bank.example. ... information back to the user s browser, the fake web page can send a fake public key to the user ...   more details



  1. S/KEY

    of the basic patents on public key cryptography and the widespread use of laptop ...S KEY is a one time password system developed for authentication to Unix like operating system s, especially from dumb terminals or untrusted public computers on which one does not want to type a long term password. A user s real password is combined in an offline device with a short set of characters and a decrementing counter to form a single use password. Because each password is only used once, they are useless to Packet sniffer password sniffers . Because the short set of characters does not change ... amounts to challenge response authentication . S KEY is supported in Linux via Pluggable authentication ... OPIE . S KEY is a trademark of Telcordia Technologies , formerly known as Bell Communications Research Bellcore . S KEY is also sometimes referred to as Lamport s scheme , after its author, Leslie ..., not just the password, S KEY is falling into disuse. cn Schemes that implement two factor authentication ... that will perform the authentication. File Skey password generation.svg thumb 280px S KEY password generation This step begins with a secret key math W math . This secret can either be provided ... of S KEY is compromised A cryptographic hash function math H math is applied math n math ... authentication.svg thumb 320px S KEY authentication After password generation, the user has a sheet ... i 1 math , which is stored as reference on the server. Security The security of S KEY relies on the difficulty ... to do with current cryptographic hash functions . S KEY is however vulnerable to a man in the middle .... Usability Internally, S KEY uses 64 bit numbers. For human usability purposes, each number is mapped ... http www.ocf.berkeley.edu jjlin jsotp jsotp JavaScript OTP & S Key Calculator http www.orange carb.org ... S key calculator for cell phones Category Cryptographic software Category Password authentication it S KEY pl S KEY ru S Key ...   more details



  1. The Key

    The Key may refer to tocright Films The Key 1934 film The Key 1934 film , a 1934 film directed by Michael Curtiz The Key 1958 film The Key 1958 film , a war film directed by Carol Reed, starring William Holden and Sophia Loren The Key 1961 film The Key 1961 film , a Soviet animated feature The Key 1965 film The Key 1965 film , a Yugoslav omnibus film Kelid The Key , a 1987 Iranian film written by Abbas Kiarostami Literature The Key Curley novel The Key Curley novel , by Marianne Curley The Key Tanizaki novel The Key Tanizaki novel , by Jun ichir Tanizaki The Key , a 1969 book of etymology by John Philip Cohane Music The Key Nocturnus album The Key Nocturnus album , 1990 The Key Vince Gill album The Key Vince Gill album , 1998 The Key Speech Debelle song The Key Speech Debelle song , 2009 The Key Ou Est Le Swimming Pool song The Key Ou Est Le Swimming Pool song , 2010 The Key , a song by Edita Abdieski Television The Key Prison Break episode The Key Prison Break episode The Key Yes, Prime Minister The Key Yes, Prime Minister , a 1986 Yes, Prime Minister episode The Key Code Lyoko episode The Key Code Lyoko episode , an episode of Code Lyoko Other The Key, a painting by Jackson Pollock The Key School , an independent coeducational school in Annapolis, Maryland The Key comics , a supervillain in the DC Comics universe See also Key disambiguation The Keys disambiguation disambiguation fr The Key it The Key hu Kulcs egy rtelm s t lap zh ...   more details



  1. KeY

    the GNU General Public License GPL . Overview The usual user input to KeY consists of a Java source file with annotations in either JML or OCL. Both, they are translated to KeY s internal represenation, KeY Java Card DL dynamic logic . From the given specifications, several proof obligations arise which ... tree of the implementation under test which is computed by the KeY system. Distribution and Variants of the KeY System KeY is free software written in Java and licensed under GNU public license GPL ...Infobox software name KeY logo Image Keylogo.gif screenshot Image Key tool.jpg 250px caption Screenshot of KeY 1.4 developer Karlsruhe Institute of Technology , Technische Universit t Darmstadt , Chalmers ... status Active genre Formal verification license GNU General Public License GPL website http www.key project.org www.key project.org The KeY tool is used in formal verification of Java programming language ... and then compared against program semantics which are likewise defined in terms of dynamic logic. KeY ... tool CASE tools to extract specifications. There have been several extensions to KeY in order ... . KeY is jointly developed by Karlsruhe Institute of Technology , Germany Technische Universit t Darmstadt .... At the heart of the KeY system lies a first order theorem prover based on sequent calculus , which ... simple language to describe changes to a sequent. Java Card DL The theoretical foundation of KeY ... langle alpha rangle math . Deduction component At the heart of the KeY system lies a first order theorem ... would. To save intermediate results of assignments, KeY introduces a concept called updates , which ... platform. Test Case Generator KeY is usable as a model based testing tool that can generate ... available. As another possibility, KeY can be executed directly via Java web start without the need for compilation and installation. KeY Hoare KeY Hoare is built on top of KeY and features a Hoare ... structure . This calculus can be seen as a subset to the one that is used in the main branch of KeY ...   more details



  1. Key

    Key may refer to wiktionary key Key lock , device used to open a lock or door Skeleton key or master key, a key altered to bypass wards placed inside a lock Key chart , a guide to colours and symbols used in a data chart, graph, plot or diagram Key cryptography , a piece of information that controls the operation of a cryptography algorithm Key engineering , a type of coupling used to transmit rotation between a shaft and an attached item Key map , a guide to a map s symbology Key tool , tool used to wind a clockwork motor A part inserted into aligned slots key ways in a shaft and the object bore ... Identification key , a method of deducing the correct species assignment of a living thing Single access key , a method used for categorizing species using logical choices Computing Computer keyboard keys KeY , a software verification tool Unique key , a set of fields that uniquely identify any record in a database or registry Superkey , a similar concept or idea Candidate key , a minimal superkey Keychain Mac OS , the Apple created utility for the Macintosh that stores passwords Key, which make up the key value pairs of a hash table .key, file extension used by Keynote presentation software Keynote Fiction Key comics , a DC Comics supervillain Key Marvel Comics , a fictional mutant character Key the Metal Idol , Japanese anime OVA series Kirby s Epic Yarn KEY , a 2010 game by Nintendo Places Key Island , Tasmania, Australia Florida Keys , an archipelago of about 1700 such islands in the southeast United States Music Key instrument , musical instruments have keys for tuning and keys for playing such as on a guitar Key music , a set of notes in music Key singer born 1991 , South Korean entertainer Key album Key album , an album by Son, Ambulance bell pattern Key pattern rhythm , an African .... Key signature , in musical notation and tablature Keys can be short for Keyboard instrument keyboards , a type of musical instrument part of the percussion family Surnames Key surname Keys surname ...   more details



  1. Certificate of life

    File 1939 Certificate of Life.jpg right thumb A 1939 Certificate of Life from the British Embassy in Paris. The fee has been paid through the application of revenue stamp s. A Certificate of Life also called a Proof of Life , Certificate of Existence or Letter of Existence is a certificate produced by a trusted entity to confirm that an individual is still alive. ref http lexicon.ft.com term.asp?t certificate of existence Retrieved 24 February 2010. ref Governments, pension and insurance companies and other bodies may need to check periodically that the people they are paying have not died in order that they do not overpay Life annuity annuities and pensions ref House of Commons papers, Volume 28 , by Great Britain. Parliament. House of Commons, published by Office of Public Sector Information, 1848. Page 21 ref . Where individuals are resident outside their country of origin, a Certificate of Life may be obtained from the person s embassy in their country of residence by producing proof of identity such as a passport. References Reflist External links http www.israelfm.org en notaries certificate of life Obtaining a Certificate of Life from the Israeli Consulate in New York. http www.netherlands embassy.org article.asp?articleref AR00000135EN Obtaining a Certificate of Life from the Netherlands Embassy in Washington D.C. See also Life annuity zh Category Insurance terms Category Personal finance ...   more details



  1. Certificate (HETAC)

    The HETAC One Year Certificate is a subdegree professional certification qualification offered by the Higher Education and Training Awards Council as a one year full time course in a specific discipline, below the standard of the National Certificate or National Diploma . The certificate is classified as an introductory, foundation or skills based qualification which is used to give a student a general understanding of a specific discipline, and introduce key concepts. The certificate prepares a student for work or further study, but most likely the former. See also Education in Ireland Category Professional titles and certifications Category Education in the Republic of Ireland Europe edu stub ireland stub Unreferenced date September 2007 ...   more details




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