RADIO LAN SYSTEM AND ENCIPHERING METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To prevent the processing of data not to be enciphered from being delayed and to enable communication without causing any unpleasantness due to processing delay by providing an encryption use/unuse selecting part for selecting the use/unuse of encryption by a user, providing a master station with a management table for managing a slave station and enciphering only data to be enciphered. SOLUTION: A slave station control part 114 operates a slave station transmission data encryption processing part 103 and enciphers input data when an encryption use/unuse selecting part 113 selects encryption use. A slave station transmission data scrambling processing part 104 makes the enciphered input data random, a slave station transmission data processing part 105 makes it a packet and a slave station transmitting part 106 performs radio modulation of it. When a signal showing that encryption processing is performed is included in a received signal, a master station controlling part 214 registers that the terminal selects encryption with an encryption management table 213 and a master station received data encryption decoding processing part 212 performs encryption decoding processing.