Scrambling and descrambling of data with improved security
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United States of America Patent
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Jul 28, 1998
Grant Date -
N/A
app pub date -
Jul 19, 1996
filing date -
Dec 7, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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