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Bruno Brachtl
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Herrenberg, DE
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last 30 patents
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Patent Grant
Data authentication using modification detection codes based on a p...
Patent number
4,908,861
Issue date
Mar 13, 1990
International Business Machines Corporation
Bruno O. Brachtl
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Controlled use of cryptographic keys via generating station establi...
Patent number
4,850,017
Issue date
Jul 18, 1989
International Business Machines Corp.
Stephen M. Matyas
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Transaction security system
Patent number
4,755,940
Issue date
Jul 5, 1988
International Business Machines Corporation
Bruno Brachtl
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Transaction security system using time variant parameter
Patent number
4,747,050
Issue date
May 24, 1988
International Business Machines Corporation
Bruno Brachtl
G06 - COMPUTING CALCULATING COUNTING