In a wireless communication system comprising a plurality of fixed communication units (FCUs) (102) and portable communication units (PCUs) (120), each comprising an encryption synchronization counter (ESC) (314, 414), the PCU and FCU having a digital transmission format (201), a method of maintaining...http://www.google.fr/patents/US5243653?utm_source=gb-gplus-shareBrevet US5243653 - Method and apparatus for maintaining continuous synchronous encryption and decryption in a wireless communication system throughout a hand-off
Method and apparatus for maintaining continuous synchronous encryption and ...
