METHOD AND APPARATUS FOR RESOLVING PROBLEM OF NON-REFUSING OF MESSAGE IN COMPUTER NETWORK

摘要

PURPOSE: To establish the authentication of a transmitted message required for keeping secrecy by interpolating the use of an authenticated token affixed to the message for giving the certificate of the origin of the message. CONSTITUTION: When a data processor 300 starts the processing of a message, the message is delivered to a unit 310 which is a non-refusing vector(NRV) generator. The information stored in a non-refusing log(NRL) 340 drawn from one or more preceding messages transmitted from or received by the processor 300 and given to the unit 310 by controlling keys 320 and 330 is received as an input. The information stored in the log 340 is stored with maintainability and part of the information is stored as secrecy. The unit 310 generates an NRV from the present message and preceding information together with the corresponding NRL entry and stores the NRV in the NRL 340. The unit 310 also generates an authenticated token which links the transmitted NRV with the transmitted message in a cryptographic form by using the key 330.