Key handling with control vectors.

From: IBM Systems Journal | Date: June 1, 1991| Author: Matyas, Stephen M. | Copyright information

A method is presented for controlling cryptographic key usage based on control vectors. Each cryptographic key has an associated control vector that defines the permitted uses of the key within the cryptographic system. At key generation, the control vector is cryptographically coupled to the key via a special encryption process. Each encrypted key and control vector is stored and distributed within the cryptographic system as a single token. Decryption of a key requires respecification of th...

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