METHOD AND APPARATUS FOR GENERATING AN UNIQUE ENCRYPTION KEY STREAM FOR EACH DATA BLOCK IN A FRAME

摘要

The present invention provides a method and an apparatus for generating an unique encryption key stream for each data block in a frame during a transmission through an over-the-air interface. A private key (310) and a dynamic system parameter (320) are combined to generate a session key (330). The dynamic system parameter (320) is based on information relating to the transmission such as the source, the location, the time, the method, and the type of the transmission. An unique encryption key stream is generated from the session key (320) for each data block in a frame. Information is encrypted with the unique encryption key stream to enhance security for transmissions through an over-the-air interface.