Device for effecting a modification in a stream of transmission

Cryptography – Key management – Having particular key generator

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Details

370 851, 381 20, H04L 900

Patent

active

053414306

ABSTRACT:
A device for effecting a modification in a stream of transmission blocks detects a transmission block to be modified and generates a detection signal via detection means, which comprises delay means for effecting a delay in the stream of transmission blocks. The device further comprises memory means for generating, in response to the detection signal, the modification to be applied, and combining means for combining the stream of transmission blocks and the modification to be applied, provided with a first input for receiving the stream of transmission blocks, with a second input for receiving the modification to be applied and with an output for generating a modified stream of transmission blocks. The combining means comprises switch-over means for coupling one of the inputs through to the output, as a function of the detection signal. Due to the use of the switch-over means and due to the delay means being a part of the detection means, the combining means can be bufferless.

REFERENCES:
patent: 4566097 (1986-01-01), Bederman
patent: 4567590 (1986-01-01), Bederman
patent: 4769814 (1988-09-01), Bederman et al.
patent: 5072447 (1991-12-01), Perloff et al.

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