Method and apparatus for encryption of over-the-air...

Details Method and apparatus for encryption of over-the-air... Method and apparatus for encryption of over-the-air...

H - Electricity

04

W

H04W 12/00 (2009.01) H04W 12/02 (2009.01) H04W 12/04 (2009.01)

Patent

CA 2733205

A communication device (202) converts a bit stream to multiple symbols and provides encryption at a physical layer by shifting a phase of each symbol of the multiple symbols to produce multiple encrypted symbols. Each encrypted symbol of the multiple encrypted symbols is modulated with an orthogonal (214) subcarrier to produce at least one modulated subcarrier and the at least one modulated subcarrier is then transmitted (278) via a wireless link. On a receive side (260), a receiving (260) communication device (250) receives the transmitted (230), encrypted symbols and provides decryption at a physical layer by shifting a phase of each encrypted symbol in correspondence with the phase (234) used to encrypt the symbol at the transmit side.

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