| 摘要 |
PROBLEM TO BE SOLVED: To provide an encryption management method capable of ensuring higher safety. SOLUTION: The method includes a request transmission step S11 of allowing a client device 2 to transmit an encryption system change request 31 to a server device 1; a request reception step S1 of allowing the server device 1 to receive the encryption system change request 31; a selection step S5 of allowing the server device 1 to select an encryption system 14 from the plurality of encryption systems 14 after the reception of the encryption system change request 31; a reconfiguration information generation step S6 of generating reconfiguration information 36 that forms a circuit for decrypting data encrypted by the selected code system 14, in a reconfigurable device 22 that the client device 2 has; and a circuit formation step S16 of allowing the client device 2 to form the circuit for decrypting the data encrypted by the selected encryption system 14, in the reconfigurable device 22 that the client device 2 has by the reconfiguration information 36. COPYRIGHT: (C)2007,JPO&INPIT
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