Method and apparatus for encrypting radio traffic in a telecommunications network
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United States of America Patent
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Dec 15, 1998
Grant Date -
N/A
app pub date -
Sep 9, 1996
filing date -
Sep 9, 1996
priority date (Note) -
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Abstract
A generic communications network provides an encrypted communications interface between service networks and their subscribers. When communications are initiated between a subscribing communications terminal and the generic network, the terminal compares a stored network identifier associated with a stored public key, with a unique identifier broadcast by the generic network. If a match is found, the terminal generates a random secret key, encrypts the secret key with the stored public key, and transmits the encrypted secret key. The generic communications network decrypts the secret key using a private key associated with the public key. The secret key is used thereafter by the terminal and the generic network to encrypt and decrypt the ensuing radio traffic. Consequently, the network can maintain secure communications with the terminal without ever knowing the terminal's identity.
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