Dynamic encryption key selection for encrypted radio transmissions
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United States of America Patent
Stats
-
Jun 22, 1993
Grant Date -
N/A
app pub date -
Apr 3, 1991
filing date -
Apr 3, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A radio (100) transmits and receives encrypted signals having unencrypted key identifiers, allowing other radios having the corresponding key identifiers and encryption keys to communicate with radio (100). Prior to transmitting an encrypted message, radio (100) selects a unique key identifier automatically and uses the corresponding encryption key to encrypt the message that will be transmitted. Radio (100) transmits the key identifier in an unencrypted format with the encrypted message in order to allow other radios to determine the encryption key used in encrypting the message. When receiving an encrypted message, radio (100) uses the predetermined process stored in the radio (100) to properly select the proper encryption key for use in decrypting the incoming message.
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