Automatic selection of decryption key for multiple-key encryption systems
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United States of America Patent
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-
Apr 3, 1984
Grant Date -
N/A
app pub date -
Jun 17, 1981
filing date -
Jun 17, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A receiver of digitally encoded voice signals that may be encrypted according to a plurality of keep subjects a received signal to decryption according to each of the keys. Decrypted signals are tested for the presence of modulation, and the signal, if any, that is decrypted is recovered for use. If it is desired, a visual indication may tell a user which key is being used to decrypt the signal.
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