| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide communication equipment, capable of transmitting and receiving desired data with higher security property. SOLUTION: Two IC cards 40-1 and 40-2 , and 40-3 and 40-4 , respectively held by a user and a manager, are mounted at both a transmission side and a reception side so that divided pattern tables, key tables, and enciphered pattern tables stored to be divided in the respective two IC cards can be formed as a complete table, and that the following data communication processing can be properly executed. Under that condition, data to be transmitted are connected and then divided by a data dividing part 13, and added with electronic signatures by an electronic signature part 14, and added with dummy files by a dummy file adding part 15, and added with dummy data by a dummy data adding part 16, and enciphered by an enciphering part 17, and transmitted by a transmitting part 18. At the reception side, the reverse processing is executed, so that the original data file can be restored.</p> |
