INFORMATION DELIVERY METHOD AND SYSTEM UTILIZING ZERO INTELLIGENCE PROOF PROTOCOL

摘要

PURPOSE: To provide an information delivery method and system utilizing the zero intelligence proof protocol by which illegal act is surely prevented by processing simultaneously the process of verifying the user, the process of information delivery and the process of recording and managing communication history data when the user requests the delivery of information to an information server. CONSTITUTION: A card 1 is used for a random number generating means 12 to generate a random number and sends it to an information server via a communication control means 24. The information server uses a verification means 33 to verify the random number. When the verification is successful, the state is recorded in a history management means 34 as a communication history and managed therein. Then all sets of check texts generated by an information division means 32 are sent. The card 1 links all the sets of the check texts recorded in a storage means 14 and copies an information ciphering secret key and transfer the key to a utility means 23 of the user terminal equipment 2. The utility means 23 decodes the ciphering message stored in the storage means 22 to obtain the message.