| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a remote maintenance system and remote maintenance method capable of acquiring information of a device owned by a plurality of users while maintaining anonymity and providing the device whose response necessity is discovered from the information with response contents while maintaining anonymity. <P>SOLUTION: A management device A transmits a maintenance public key pkm to respective devices D1 to Dn and then transmits a container packet, the respective devices combine log information and a user public key pku unique to the devices to store information encrypted by the maintenance public key pkm in the container packet, the management device A receiving the container packet storing all information acquires the log information of the respective devices by decryption with a maintenance secret key skm, encrypts response contents by the user public key pku to transmit the response contents to the respective devices when log information having response necessity exists, and a device succeeding in decryption with its own user secret key executes processing corresponding to the response contents. <P>COPYRIGHT: (C)2013,JPO&INPIT |
