Apparatus for validating the presence of an authorized...

Details Apparatus for validating the presence of an authorized... Apparatus for validating the presence of an authorized...

2004-02-19

2008-11-18

Zand, Kambiz (Department: 2134)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C726S020000

Reexamination Certificate

active

07454617

ABSTRACT:
An apparatus for validating the presence of an authorized accessory of the apparatus includes an integrated circuit which stores a secret key K, is configured to define a random number generator which returns R and is configured to apply a function F[R] to return FK[R], based on the secret key K. The apparatus includes a control system which is configured to request FK[R] from the integrated circuit and from a further integrated circuit positioned on the accessory and to compare FK[R] from both the integrated circuits.

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Redl et al., An Introduction to GSM, 1995, Artech House, Inc., pp. 45-46.

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