Method and apparatus for encryption of wireless communication

Details Method and apparatus for encryption of wireless communication Method and apparatus for encryption of wireless communication

H - Electricity

04

K

H04K 1/02 (2006.01) H04K 1/04 (2006.01)

Patent

CA 2579983

A communication device (202) encrypts symbols at a physical layer in order to improve encryption of data transmitted over a wireless link. A symbol mapper (208) of the communication device receives a bit stream comprising multiple bits and maps the multiple bits to multiple symbols. An amplitude and phase adjuster (210) of the communication device receives the multiple symbols and encrypts the symbols by applying at least one of a phase shift and an amplitude adjustment to each symbol to produce multiple encrypted symbols for transmission over a wireless link. In another embodiment of the present invention, a communication device (250) is provided that is able to decrypt the encrypted symbols by applying at least one of a phase shift and an amplitude adjustment to each encrypted symbol that corresponds to a phase shift or an amplitude adjustment applied to the symbol by a transmitting communication device.

Selon l'invention, un dispositif de communication (202) crypte des symboles au niveau d'une couche physique de manière à améliorer le cryptage de données transmises sur une liaison sans fil. Un mappeur de symboles (208) du dispositif de communication reçoit un train de bits comprenant de multiples bits et mappe les multiples bits avec de multiples symboles. Un dispositif de réglage d'amplitude et de phase (210) du dispositif de communication reçoit les multiples symboles et crypte les symboles par application d'un décalage de phase et/ou d'un réglage d'amplitude sur chaque symbole afin de produire de multiples symboles cryptés destinés à être transmis sur une liaison sans fil. Dans un autre mode de réalisation, la présente invention concerne un dispositif de communication (250) pouvant décrypter les symboles cryptés par application d'un décalage de phase et/ou d'un réglage d'amplitude sur chaque symbole crypté qui correspond à un décalage de phase ou à un réglage d'amplitude appliqué sur le symbole par un dispositif de communication émetteur.

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