A Method of Protecting a Cryptosystem from a Multiple Transmission Attack

摘要

How to protect your passwords from the system multiplex attack; a) protection message (protected message) the step of applying the clear text (plaintext) message to be encrypted with a password protected with a cryptographic key k to produce,; (B) steps to create a password input message from the message, and protect the cryptographic key k and; (C) comprises the step of encrypting an input message.; The present invention is not particularly applicable, but in public key cryptosystems, limited thereto. When the present invention is to be used in conjunction with strong encryption standard, the present invention is encrypted, even if the text is sent the same message several times, it prevents attacks by multiplex sure that differently each time a message is sent.