Identifier of the Public Key of a Certification Authority (a Member State or the European Certification Authority).

CertificationAuthorityKID ::= SEQUENCE {

nationNumeric NationNumeric

nationAlpha NationAlpha

keySerialNumber INTEGER(0..255)

additionalInfo OCTET STRING(SIZE(2))

caIdentifier OCTET STRING(SIZE(1))

}

nationNumeric is the numerical nation code of the Certification Authority.

nationAlpha is the alphanumerical nation code of the Certification Authority.

keySerialNumber is a serial number to distinguish the different keys of the Certification Authority in the case keys are changed.

additionalInfo is a two byte field for additional coding (Certification Authority specific).

caIdentifier is an identifier to distinguish a Certification Authority Key Identifier from other Key Identifiers.

Value assignment: ′01h′.