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

摘要

In order to strengthen the function of preventing data leak, alteration, spoofing, ingression, and attack without modifying an upper node application program, there is provided a new encryption system TCP2 in which an encryption/decryption logic is decided by the transmission side and the reception side and this is applied to the payload of the protocol corresponding to TCP or UDP existing in the transport layer. By employing this TCP2, it is possible to eliminate various restrictions of the conventional IPsec or SSL and realize an encryption processing communication compatible in the IP layer without being restricted by the upper node application.