COMMUNICATION SYSTEM, COMMUNICATION DEVICE, COMMUNICATION METHOD, AND COMMUNICATION PROGRAM FOR REALIZING THE SAME

摘要

In order to strengthen preventing functions of data leakage, falsifying, camouflage, approach and attack without changing a program of a higher rank application, encryption and decryption logic arrangement is carried out on the transmission side and on the reception side and this is offered to a new encryption system TCP2 applied to a payload of a protocol which corresponds to TCP or UDP existing in a transport layer. By employing this TCP2, a cryptograph process communication can be realized by dissolving various kinds of restrictions which a conventional IPsec or SSL possesses without receiving a restriction of a higher rank application and at the same time, by obtaining compatibility in an IP layer.