METHOD TO PREVENT OMISSION OF INFORMATION IN CIPHERING

摘要

PROBLEM TO BE SOLVED: To prevent omission of information by conducting stream ciphering employing double and triple overlapping so as not to leave a clue to decipher an original sentence when a ciphering code is opened into a file. SOLUTION: An initial value is given to a logistic mapping, pseudorandom numbers or PN signals are generated, EXOR computations are conducted with an original sentence digital file and a stream ciphering code is generated. In order to prevent occurrence of character omission, stream ciphering is conducted for a plurality of times. COPYRIGHT: (C)2004,JPO