Cryptographic communication method and cryptographic communication device

摘要

A cryptographic communication device for carrying out cryptographic communication among a plurality of stations interconnected through a communication network, generating public information and secret information corresponding to the public information in each station, and distributing encrypted sending information by using the public and secret information from a sending station (1B) to one or more receiving stations (2B) among stations wherein key-distribution-information (Y) is generated in the sending station (1B) by employing a second random number or a time information, where said second random number or time information are also used for restoring the cryptographic key (K).