| Subject | English | Polish |
| comp., MS | Authority Key Identifier | identyfikator klucza urzędu certyfikacji (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) |
| comp., MS | subject key identifier | identyfikator klucza podmiotu (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) |