Personal identification number processing using control vectors

Details Personal identification number processing using control vectors Personal identification number processing using control vectors

G - Physics

07

F

354/230

G07F 7/10 (2006.01) G09C 1/00 (2006.01) H04L 9/00 (2006.01)

Patent

CA 1313411

PERSONAL IDENTIFICATION NUMBER PROCESSING USING CONTROL VECTORS ABSTRACT Cryptographic PIN processing is achieved in an improved manner by associating control vectors with the PIN generating (verification) keys and PIN encrypting keys which provide authorization for the uses of the keys intended by the originator of the keys. The originator may be the local cryptographic facility (CF) and a utility program under the control of a security administrator, or the originator may be another network node. Among the uses specified by the control vector are limitations on the authority to use the associated key with certain PIN processing instructions, such as PIN generation, verification, translation and PIN block creation. Furthermore, the control vector may limit the authority of certain instructions to process clear PIN inputs (such as in PIN verification). The control vector may contain information identifying and, possibly restricting, PIN processing to a particular PIN format or particular processing algorithm. The control vector implementation provides a flexible method for coupling format, usage, and processing authorization to keys. The system administrator can exercise flexibility in changing the implementation of his security policy by selecting appropriate control vectors in accordance with the invention. Furthermore, a method is provided for the security administrator to restrict certain PIN format translations. MA9-88-013

600676

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