Version 2 Fields
An X.509 version 2 certificate contains the basic fields defined in version 1 and adds the following fields.
Issuer Unique Identifier
Contains a unique value that can be used to make the X.500 name of the CA unambiguous when reused by different entities over time.
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-- Issuer Unique identifier
---------------------------------------------------------------------
issuerUniqueIdentifier ::= [1] IMPLICIT UniqueIdentifier OPTIONAL
UniqueIdentifier ::= BITSTRING
Subject Unique Identifier
Contains a unique value that can be used to make the X.500 name of the certificate subject unambiguous when reused by different entities over time.
---------------------------------------------------------------------
-- Issuer Unique identifier
---------------------------------------------------------------------
subjectUniqueIdentifier ::= [2] IMPLICIT UniqueIdentifier OPTIONAL
UniqueIdentifier ::= BITSTRING
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