Cryptography – Key management – Having particular key generator
Patent
1989-02-07
1991-03-26
Buczinski, Stephen C.
Cryptography
Key management
Having particular key generator
380 9, 380 50, 3701001, H04J 306, H04K 100
Patent
active
050035991
ABSTRACT:
An in-band framing encoder, for continuously operating on bit stream having external-framing data and payload data. The bit stream includes a plurality of time-division-multiplexed frames of payload data achieving channel integrity with external-framing data. The encoder comprises a framing-bit detector and a framing-bit remover for detecting the external-framing data of the bit stream, and removing the external-framing data from the bit stream. A unique-bit-pattern generator generates a unique-bit-pattern sequence. A multiplexer multiplexes the unique-bit-pattern sequence with payload data over the plurality of time-division-multiplexed frames of payload data, thereby generating internally-reframed data having the unique-bit-pattern sequence multiplexed with the payload data. The in-band framing decoder continuously operates on internally-reframed data having a unique-bit-pattern sequence multiplexed with payload data, wherein the internally-reframed data includes a plurality of time-division-multiplexed frames of payload data having channel integrity maintained with the unique-bit-pattern sequence. The decoder further comprises a synchronizer for detecting the unique-bit-pattern sequence in the internally-reframed data. In response to detecting the unique-bit-pattern sequence the synchronizer generates a synchronization signal. A unique-bit-pattern-sequence masker responsive to the synchronization signal for masks the unique-bit-pattern sequence in the internally-reframed data, thereby generating second-payload data. A channelizer means is responsive to the synchronization signal, inserts external-framing data into the second-payload data.
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Buczinski Stephen C.
Gregory Bernarr Earl
Simulation Laboratories, Inc.
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