International Business Machines Corporation

Rotislaw Prymak

Phil C Yeh

Donald B Johnson

Stephen M Matyas

Ronald M Smith

John D Wilkins

Dennis G Abraham

An Van Le

A working key of a certain key type is to be transmitted from a first system (having a first usage-control value associated with keys of the certain type) and a second system (having a second usage-control value associated with keys of the certain type). A translation control value, associated with the certain key type, is generated, functionally relating the first and second usage-control values. The translation control value is used in a cryptographic function to send or receive the working key between systems, the cryptographic function being designed to produce valid results when the correct translation control value, and usage-control values, are employed, and unpredictable results otherwise. Effectively, the first usage-control value is translated to the second usage-control value.

Secure translation of usage-control values for cryptographic keys

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Dumfries, VA, United States of America

Rotislaw Prymak