Secure translation of usage-control values for cryptographic key

Details Secure translation of usage-control values for cryptographic key Secure translation of usage-control values for cryptographic key

1991-08-30

1993-01-05

Cangialosi, Salvatore

Cryptography

Key management

Having particular key generator

380 21, 380 25, H04L 932

Patent

active

051777916

ABSTRACT:
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.

REFERENCES:
patent: 5081677 (1992-06-01), Green et al.
patent: 5103478 (1992-04-01), Matyas et al.

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