Encryption synchronization combined with encryption key identification
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United States of America Patent
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Feb 9, 1993
Grant Date -
N/A
app pub date -
May 30, 1991
filing date -
May 30, 1991
priority date (Note) -
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status (Latency Note)
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Abstract
In an encrypted radio system, transmsitters and receivers can each be provided with a plurality of encryption algorithms (407 and 425) and/or encryption key variables (408 and 426). A unique logical ID (409 and 427) corresponds to each of the above. During transmission of an encrypted message, both encryption synchronization information (319) and information concerning the logical ID (318) is repetitively interleaved with the encrypted message itself. So configured, a receiver that temporarily loses viable reception can again obtain encryption synchronization and algorithm/key information, and therefore rapidly recover from the reception disturbance.
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