Method of authentication with improved security for secrecy of a

Details Method of authentication with improved security for secrecy of a Method of authentication with improved security for secrecy of a

1993-08-16

1994-12-27

Barron, Jr., Gilberto

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

379 62, 34082534, H04L 932, H04M 1100

Patent

active

053772679

ABSTRACT:
A method of subscriber authentication suitable for a roaming service in a telecommunication capable of realizing an improved security for the secrecy of the authentication key. In this method, an authentication data Indicative of a tentative authentication key to be used only in the authentication at the second network is transmitted from the second network to the first network, and the first network enciphers this authentication data by using a permanent authentication key shared between the first network and the mobile subscriber, and transmits this enciphered authentication data to the mobile subscriber via the second network, such that the mobile subscriber can decipher this enciphered authentication data by using the permanent authentication key to obtain the tentative authentication key and subsequently carry out the authentication at the second network by using the obtained tentative authentication key, wlthout explicitly disclosing the permanent authentication key to the second service provider.

REFERENCES:
patent: 5153919 (1992-10-01), Reeds, III et al.
patent: 5233656 (1993-08-01), Langrand et al.
patent: 5241598 (1993-08-01), Raith
European Search Report dated Dec. 6, 1993 (EP 93113282.3).

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