SECRET COMMUNICATION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a system in which information can be safely transmitted by using the irregular variation in the transmission line characteristics of radio communications. SOLUTION: By using the irregular variation in the transmission characteristics and dependency on a transmitting/receiving place therefor, only the number of errors due to a recipient is selectively decreased. Therefore, processing is performed for estimating a portion where the possibility of the occurrence of an error due to the recipient is high and for selectively correcting information in such a portion and on the other hand, a method is used for preventing the contribution to decrease in the number of errors due to a wiretapper. COPYRIGHT: (C)2003,JPO