Cryptographic communication terminal, cryptographic communication center apparatus, cryptographic communication system, and storage medium

摘要

A cryptographic communication terminal serving as one of information transmitting and receiving terminals in cryptographic communication includes a cryptographic algorithm storage section for storing one or more types of cryptographic algorithm used for cryptographic communication, and outputting a designated cryptographic algorithm, a key information storage section for storing a key used for cryptographic communication corresponding to the cryptographic algorithm, and outputting a designated key, a control section for designating, with respect to the cryptographic algorithm storage section and the key information storage section, which cryptographic algorithm and key are to be used in the cryptographic communication, and an encryption/decryption section for decrypting received encryption information by using the cryptographic algorithm designated with respect to the cryptographic algorithm storage section and the key designated with respect to the key information storage section, and encrypting information to be transmitted.