A public key enciphering and deciphering system using stream ciphers

摘要

The public key enciphering/deciphering system is for the transmission and reception enciphered text. The system includes encryption apparatus which generates enciphered text from plain text, and is provided with means which handles a stream cipher algorithm to transform plain text into enciphered text. The system further includes decryption apparatus which receives the enciphered text, and is provided with means which handles a stream cipher algorithm to transform the enciphered text into plain text. As shown the encryption apparatus includes a pseudo-random sequence generator PSG, a plain text generator PG, an encryptor RSA, a code tree CT and a code tree controller CTC.