| 摘要 |
<P>PROBLEM TO BE SOLVED: To ensure security while giving and receiving information efficiently. <P>SOLUTION: An information processor 11 generates a first key having a length corresponding to a service prescribed by service combination information received from an information processor 41, encodes the information by the first key to send it to the information processor 41, and also decodes the encoded information from the information processor 41 by the first key. The information processor 41 encodes the information to be sent to the information processor 11 by a second key corresponding to the first key, and also decodes the encoded information from the information processor 11. <P>COPYRIGHT: (C)2010,JPO&INPIT |
