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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 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.
The modern military identification card is a smart card commonly known as a Common Access Card (CAC) used by servicemembers and DoD civilians. It works with specialized card readers for use with automatic building access control systems, communications encryption, and computer access. [2]
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.
RAs, however, do not sign or issue certificates (i.e., an RA is delegated certain tasks on behalf of a CA)." [4] While Microsoft may have referred to a subordinate CA as an RA, [5] this is incorrect according to the X.509 PKI standards. RAs do not have the signing authority of a CA and only manage the vetting and provisioning of certificates.
In computer security, an attribute certificate, or authorization certificate (AC) is a digital document containing attributes associated to the holder by the issuer. [1] When the associated attributes are mainly used for the purpose of authorization, AC is called authorization certificate. AC is standardized in X.509. RFC 5755 further specifies ...
Expiration dates are not a substitute for a CRL. While all expired certificates are considered invalid, not all unexpired certificates should be valid. CRLs or other certificate validation techniques are a necessary part of any properly operated PKI, as mistakes in certificate vetting and key management are expected to occur in real world ...