| Subject | English | Spanish |
| fin., IT | authentication key identifier | identificador de la clave del autentificador |
| comp., MS | Authority Key Identifier | Identificador de clave de entidad emisora (A certificate extension used by the certificate chaining engine to determine what certificate was used to sign a presented certificate. The AKI can contain the issuer name, serial number, public key information, or no information at all. By matching the information in a certificate's AKI extension to a CA certificate's Subject Key Identifier (SKI) extension, a certificate chain can be built) |
| fin., IT | identifier of authentication key | identificador de la clave del autentificador |
| fin., IT | identifier of key to be discontinued | identificador de clave a abandonar |
| fin., IT | key enciphering key identifier | identificador de clave de cifrado de claves |
| comp., MS | key identifier | identificacor clave (A globally unique identifier that uniquely identifies content for the purposes of licensing) |
| fin., IT | key identifier | identificador de clave |
| comp., MS | subject key identifier | identificador de clave del firmante (A certificate extension that contains a hash of the certification authority's certificate public key. This hash is placed in the Authority Key Identifier (AKI) extension of all issued certificates to facilitate chain building) |