Encrypting communications between wireless mobile units
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 14, 2004
Grant Date -
N/A
app pub date -
Mar 17, 2000
filing date -
Mar 17, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A wireless mobile unit includes a voice encoder circuit that receives an analog voice signal and creates digital voice data representing a user's voice. The mobile unit receives an encryption key entered by the user, typically on the keypad or through a voice recognition circuit, and stores the encryption key in a storage device. An encryption circuit encrypts the digital voice data using the encryption key. A transmitter then modulates the encrypted voice data onto an RF signal and transmits the RF signal to a base station in a wireless network. The base station uses the same encryption key to decrypt the signal before transmitting it to another base station or mobile unit. Signals transmitted from the base station to the mobile unit are encrypted and decrypted using a user-selected encryption key in a similar manner.
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