System for enciphering or deciphering data

摘要: A system for enciphering or deciphering wherein bit patterns in a binary number notation of plurality elements, which an irreducible polynomial the Galois field GF (2i) has, are stored registers arranged certain correspondence with positions input data messages, as random numbers encryption key decryption key. The retained corresponding to digit "1" subjected mod 2 addition operation independently each numbers, thereby obtain encipher decipher data. elements be used and keys have specific relationship therebetween conformity periodical characteristic has.