Object Identifier (OID)

A specialized formatted number that is registered with an internationally recognized standards organization. The unique alphanumeric/numeric identifier registered under the ISO registration standard to reference a specific object or object class. In the federal government PKI they are used to uniquely identify each of the four policies and cryptographic algorithms supported.

See NIST SP 800-32 for more information.

A globally unique identifier of a data object as defined in ISO/IEC 8824-2.

See NIST SP 800-73-4 under Object Identifier for more information.

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