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The EDIPI number is stored in a PKI certificate. Depending on the owner, the CAC contains one or three PKI certificates. If the CAC is used for identification purposes only, an ID certificate is all that is needed. However, in order to access a computer, sign a document, or encrypt email, signature and encryption certificates are also required.
The Common Access Card (CAC), which is issued by the Department of Defense through DEERS, has an EDIPI on the card. A person with more than one personnel category is issued a CAC for each role, but the EDIPI will remain the same for all CACs issued to that individual. The EDIPI is unique to an individual.
Each card contains a Federal Agency Smart Credential Number (FASC-N), which uniquely identifies each card in Federal databases, encoded on its ICC. On the faulty cards, the FASC-N has not been fully encoded, causing the readers to view the card as an invalid card. The agency has posted a list online with the serial numbers of affected cards.
The OCSP responder uses the certificate serial number to look up the revocation status of Alice's certificate. The OCSP responder looks in a CA database that Carol maintains. In this scenario, Carol's CA database is the only trusted location where a compromise to Alice's certificate would be recorded.
In public key infrastructure (PKI) systems, a certificate signing request (CSR or certification request) is a message sent from an applicant to a certificate authority of the public key infrastructure (PKI) in order to apply for a digital identity certificate. The CSR usually contains the public key for which the certificate should be issued ...
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The authorization certificate works in conjunction with a public key certificate (PKC). While the PKC is issued by a certificate authority (CA) and is used as a proof of identity of its holder like a passport, the authorization certificate is issued by an attribute authority (AA) and is used to characterize or entitle its holder like a visa ...
X.509 also defines certificate revocation lists, which are a means to distribute information about certificates that have been deemed invalid by a signing authority, as well as a certification path validation algorithm, which allows for certificates to be signed by intermediate CA certificates, which are, in turn, signed by other certificates ...