| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve the safety of the writing and reading of information and to improve the security level by recording valuable value information, game value information and security information in a state that the information is ciphered. SOLUTION: Each data of information stored in an IC card is distinguished for every data and is stored in the storage area of the IC card. The card number is a card identification number issued by a card company and data is composed of 32 bytes, for instance. Security information is the data for judging the propriety of the IC card in each terminal equipment, that is, the data for judging the authenticity of the card and the information is preliminarily stored by the card company. The temporary counter is one to be counter when a failure exists in the reading, etc., of the IC card. The information is ciphered and is stored, and these information are transmitted as they are. Next, the ciphered reception information is decoded and the limit items of the information are checked.</p> |
