SubjectKeyIdentifier
SubjectKeyIdentifier is an X.509 v3 certificate extension (OID 2.5.29.14) that provides a compact identifier for the certificate’s subject public key. The extension value is an octet string and is typically included to simplify key lookups and certificate path building. It is usually marked non-critical.
The keyIdentifier contained in this extension is commonly derived as a hash of the subject's public key
SubjectKeyIdentifier serves to map a certificate to the corresponding public key and to assist in locating
The subjectKeyIdentifier complements the AuthorityKeyIdentifier, which identifies the public key of the certificate’s issuer. In a