G - Physics – 09 – C
Patent
G - Physics
09
C
340/70
G09C 1/10 (2006.01) G07F 7/10 (2006.01) H04L 9/18 (2006.01)
Patent
CA 1119268
CRYPTOGRAPHIC VERIFICATION OF OPERATIONAL KEYS USED IN COMMUNICATION NETWORKS ABSTRACT In a data communication network providing communication security for communication session between a first station and a second station where each station has cryptographic apparatus provided with an operational key which should be common to both stations for cryptographic operation, an operational key verification arrangement is provided in which a first number provided at the first station is operated upon in accordance with the first station operational key to obtain cryptographic data for transmission to the second station, requiring the second station to perform an operation on the first station cryptographic data in accordance with the second station operational key to obtain cryptographic data for transmission back to the first station and performing an operation at the first station in accordance with the first number and the second station cryptographic data to verify that the second station is the source of second station cryptographic data only if the operational keys are identical. -1-
317159
Lennon Richard E.
Matyas Stephen M.
Meyer Carl H. W.
Oseas Jonathan
Prentice Paul N.
International Business Machines Corporation
Kerr Alexander
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