METHOD OF EFFECTING COMMUNICATIONS USING COMMON CRYPTOKEY

摘要

PROBLEM TO BE SOLVED: To provide a ciphering key sharing method in which security against various attacks is enhanced while generating a common ciphering key and simplifying the ciphering communication system on a network. ;SOLUTION: Fourier transformation with weighting function and center matrix processing are operated on the identifier of each entity in a center (procedures 2-1, 2-2), randomization transformation is applied the identifier based on transitory random number data generated by an artificial operation of the entity to generate a personal key specific to each entity (procedures 2-3 - 2-5), an identifier transformation algorithm is generated based on the random number data and the Fourier transformation with weighting function (procedure 2-6) and the algorithm and the personal key are distributed to the entity. Each entity acts the identifier transformation algorithm and the personal key onto the identifier of a communication opposite party to generate a common key for ciphering communication with a communication opposite party.;COPYRIGHT: (C)1998,JPO