Cryptography – Key management – Key distribution
Patent
1997-09-22
2000-10-03
Swann, Tod R.
Cryptography
Key management
Key distribution
380232, 380273, 380277, 380281, 705 66, 705 71, 713169, 713171, H04K 100
Patent
active
061283916
ABSTRACT:
A method and apparatus for asymmetrical key management in a cryptographic system is provided. Embodiments of the invention implement varying levels of diversification to manage the encryption keys. In one embodiment, a unique key per device approach is used that minimizes the risks due to unauthorized key access. In yet another embodiment, a unique key per device per transaction is used. The keys generated in embodiments of the invention can be used to authenticate one device with another. An authenticating device generates a current key that is initially unknown to an unauthenticated device. The authenticating device sends information to an unauthenticated device to assist it in determining the value of the current key. The unauthenticated device uses the determined value of the current key to derive the authenticating device's authentication value. Each device generates a authentication value that must be correctly determined by an unauthenticated device for successful authentication. Authentication is performed between two devices such that each device is authenticated with the other device. Computing devices of a system can be grouped. In one embodiment devices are grouped such that one group includes devices that have a master key and another group includes devices that have a key that is derived from the master key. Another embodiment includes groups whose devices have the group's master key and a key derived from each of the master keys of the other group(s). In this embodiment, a dual authentication process can be used to authenticate two devices from different groups.
REFERENCES:
patent: 4471216 (1984-09-01), Herve
patent: 4605820 (1986-08-01), Campbell
patent: 4811393 (1989-03-01), Hazard
patent: 4961142 (1990-10-01), Elliott et al.
patent: 5036461 (1991-07-01), Elliott et al.
patent: 5175416 (1992-12-01), Mansvelt et al.
patent: 5446796 (1995-08-01), Ishiguro
patent: 5559887 (1996-09-01), Davis et al.
patent: 5577121 (1996-11-01), Davis et al.
patent: 5602917 (1997-02-01), Mueller
patent: 5729609 (1998-03-01), Moulart
patent: 5745576 (1998-04-01), Abraham
Schneier B, "Applied Cryptography" Protocols, Algorithms and Source Code in C, Second Edition; Chapter 12, Data Encryption Standard (DES); John Wiley & Sons, New York, 1996.
"Financial Services Retail Key Management," American National Standards Institute, ANSI/ABA X9.24-19, pp. 36-50, Apr. 6, 1992.
Hellman, Martin E., "The Mathematics of Public-Key Cryptography, " Scientific American, pp. 146-157, Aug. 1979.
Fiestel, Horst, "Crytography and Computer Privacy," Scientific American, vol. 238, No. 5, pp. 15-23, May 1973.
Naccache, David, et al., "Cryptograhic Smart Cards, " IEEE Micro 1996, vol. 16, No. 3, pp. 14-24, Jun. 1996.
Denno Rodney Grant
Johnson Lance James
Callahan Paul E.
Swann Tod R.
Visa International Service Association
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