Cryptography – Communication system using cryptography – Wireless communication
Reexamination Certificate
2005-03-16
2010-12-07
Vu, Kimyen (Department: 2435)
Cryptography
Communication system using cryptography
Wireless communication
C380S028000, C380S256000, C713S153000
Reexamination Certificate
active
07848517
ABSTRACT:
A secure, open-air communication system utilizes a plurality of “decoy” data signals to hide one or more true data signals. The true data signal(s) are channel hopped with the plurality of decoy data signals to form a multi-channel “scrambled” output signal that is thereafter transmitted in an open-air communication system. The greater the number of decoy signals, the greater the security provided to the open-air system. Further security may be provided by encrypting both the true and decoy signals prior to scrambling and/or by utilizing a spatially diverse set of transmitters and receivers. Without the knowledge of the channel assignment(s) for the true signal(s), an eavesdropper may be able to intercept (and, with time, perhaps descramble) the open-air transmitted signals, will not be able to distinguish the true data from the decoys without also knowing the channel assignment(s).
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Britz David M.
Miller II Robert Raymond
Shankaranarayanan Nemmara K.
AT&T Intellectual Property II L.P.
To Baotran N
Vu Kimyen
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