The recipient of an insurance certificate issued by an insurer as proof of coverage offered by that insurer. When filling out a standard certificate form, the holder's information is typically included in a designated section. The term "authorization certificate" (AC) refers to a digital document used in computer security that contains properties certificate holder with the holder by the issuer. It is an authorization certificate (AC) when the primary function of the associated attributes is to provide permission. The X.509 standard defines AC. Internet Authorization Use Cases are further defined in RFC 5755. Certification of Acceptance is used in tandem with Public Key Certificates (PKCs).

While the personal key certificate (PKC) is issued by a Certificate Authority (CA) and serves as identification for its owner, the authorization certificate (AC) is issued by an Attribute Authority (AA) and includes the owner's information in much the same way a visa does. Used as a stamp of approval or attachment. Attribute information, in contrast to identity information, is subject to frequent change or has a limited validity time, necessitating the use of multiple certificates with distinct levels of security, validity periods, and issuing authorities.

Although AC is very similar to PKC, it omits the public key because the AC verifier is under the issuer's authority and has already been given the issuer's public key, establishing implicit trust between the two parties. This means that the AC issuer will need to establish a new key pair and replace the previous public key with a new one for all verifiers under its control if the issuer's private key is ever compromised. To do. In order to verify AC, a PKC, also known as an AC holder in AC, must be present. AC, like PKC, allows for the addition of delegated characteristics in a chain. For instance, Alice is entitled to utilize particular facilities because she has been awarded a certificate allowing her to do so. When Alice issues an AC to Bob's PKC, Bob can act on Alice's behalf.

Bob must show his PKC and AC chain in order to make advantage of the service. The service will honor your Alice-issued AC first, followed by Alice's AC from a reputable publisher. This allows the service to confirm that Alice has authorized Bob to use the service on her behalf and that the service's publisher has granted Alice access to the service. Due to the difficulty in organizing and processing AC chains, and the fact that AC is rarely used on the Internet, RFC 3281 does not suggest its use. Read more...