| 摘要 |
<P>PROBLEM TO BE SOLVED: To resolve problems that, in transmission of electronic data, there is possibility that the electronic data is read out by a third party by wiretapping of a network or by extraction from a transmission destination computer, and that, even if the electronic data is encrypted, there is possibility that the encrypted electronic data is decrypted. <P>SOLUTION: Electronic data is divided into two segments 13 and 14, and encrypted to obtain segments 15 and 16. A network of a transmission path is divided into networks 18 and 19. Thereby, since all segments of the electronic data are not obtained by wiretapping of only one network, original electronic data can be prevented from being read out even if the encryption is decrypted. Since a transmission destination computer 20 stores only the encrypted segment (large) 16 of the electronic data, all segments of the electronic data are not obtained even if a storage device is read out, and thus, the original electronic data can be prevented from being read out. <P>COPYRIGHT: (C)2013,JPO&INPIT |
