Process for the transmission and reception of personalized progr

Cryptography – Particular algorithmic function encoding – Nbs/des algorithm

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380 20, H04K 100

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active

053012330

ABSTRACT:
A process for the transmission and reception of personalized programs. The program is constituted by personalized program elements containing an identification of the recipient or addressee, the access to each program element being reserved for a single recipient and is conditioned for the possession of an access title covering the access criteria to the service and the possession of an individual identification on the part of each recipient. The access title control message enables users of the service to calculate, on the basis of the single cryptogram of a root control word and the identification of the recipient, all the personalized control words which will enable each recipient and him alone to descramble the elements relating to him.

REFERENCES:
patent: 4323921 (1982-04-01), Guillou
patent: 4797919 (1989-01-01), Murray et al.
patent: 4833710 (1990-05-01), Hirashima
patent: 4947428 (1990-08-01), Guillou et al.
patent: 4991208 (1991-02-01), Walker et al.
patent: 5208856 (1993-05-01), Leduc et al.
Computers & Security, vol. 9, No. 6, pp. 539-546, Oct., 1990, L. Harn, et al., "A Cryptographic Key Generation Scheme for Multilevel Data Security".
VLSI and Computer Peripherals, pp. 4-159 to 4-163, May 8-12, 1989, M. Steinacker, "VLSI Cryptotechnology".

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