Scrambling and descrambling of data with improved security

Details Scrambling and descrambling of data with improved security Scrambling and descrambling of data with improved security

1996-07-19

1998-07-28

Cain, David C.

Cryptography

Key management

Having particular key generator

364717, H04K 100

Patent

active

057871795

ABSTRACT:
A scrambling method of a stream formed of a series of unit streams in succession, the unit stream including a first stream part and a second stream part located behind the first stream part. The scrambling method scrambles the second stream part by using a random number generator and includes a step of supplying predetermined data included in the first stream part and having a non-fixed value, for each of the second stream part to be scrambled, to the random number generator as an initial value. Further, a scrambling apparatus, a descrambling method and a descrambling apparatus are disclosed.

REFERENCES:
patent: 5365272 (1994-11-01), Siracusa
patent: 5440640 (1995-08-01), Anshel et al.
patent: 5533128 (1996-07-01), Vobach
Patent Abstracts of Japan, vol. 95, No. 7, Aug. 31, 1995 & JP-A-07-111647 (Matsushita Electric Ind. Co. Ltd.), Apr. 25, 1995 * Abstract *.

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