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Certificate Properties

Microsoft® Certificate Server supports the use of certificates as defined in the ITU-T recommendation X.509 (also, ISO/IEC 9594-8). Other formats can be supported by extension handlers written for the formats. The following are properties that are contained in a standard X.509 certificate.

Field Description
Version Version number of the certificate.
Serial Number Serial number of the certificate.
Algorithm Identifier Signature algorithm used by the certificate signer.
Issuer Name Name of the issuer of the certificate.
Validity The time period over which the certificate is valid.
Not Before (Date) Certificate not valid before this date.
Not After (Date) Certificate not valid after this date.
Subject Name Name of the person/entity to whom the certificate is being issued, including name, organization, organization unit, locality, state or province, and country.
Subject Public Key Info Information about the subject's public key.
Algorithm The algorithm used for the public key.
Subject Public Key The actual public key (a bit string).
Optional Fields: Optional fields
Issuer Unique ID If present, version must be 2.0 or above.
Subject Unique ID If present, version must be 2.0 or above.
Extensions If present, version must be 3.0. For specifying any desired custom properties. Any number of extension fields can be included in the certificate.


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