Method and system for generation and management of secret key of

Details Method and system for generation and management of secret key of Method and system for generation and management of secret key of

1996-06-20

1998-06-16

Cain, David C.

Cryptography

Particular algorithmic function encoding

Public key

380 21, 380 25, 380 51, H04K 100

Patent

active

057683891

ABSTRACT:
A method and a system for generating and managing a secret key of a public key cryptosystem, in which the secret key is generated inside a tamper resistant device, and stored into a storage region in a personal portable device from which the secret key cannot be read out of the personal portable device, while the personal portable device is inside the tamper resistant device. Here, the secret key can be reproduced by collecting the partial secret keys from those arbitrators who judge that the secret key reproduction is appropriate. Also, the secret key is generated inside a tamper resistant personal portable device, and stored into a storage region in the tamper resistant personal portable device from which the secret key cannot be read out of the tamper resistant personal portable device. Here, the secret key can be reproduced by using the partial secret keys for constituting the secret key from all entities sharing interests with a user of the tamper resistant personal portable device.

REFERENCES:
patent: 4731842 (1988-03-01), Smith
patent: 5592561 (1997-01-01), Moore
Schneier, Applied Cryptography, p. 175, 1996.
Proceedings of 1987 IEEE Symposium on Security and Privacy, Apr. 27-29, 1987, Physical Security for the .mu.ABYSS System, Steve H. Weingart, pp. 52 to 58.
NTT Human Interface Laboratories, Project Team Article on the Certificate Signing Unit, dated Apr. 19, 1996, pp. 7 and 8; and.
Lecture Notes in Computer Science edited by G. Goos and J. Hartmanis, Advances in Cryptology--Eurocrypt '88, May 1988, Some Applications of Multiple Key Ciphers, pp. 454 to 467.

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