| 摘要 |
<p>.A Master key management device includes encrYption key generation-:meansfor generating, by using a first, secret key stored in first storage means -and a!thirdpublic key, a re-encryption key used to r .encrypt a second. secret key which is stored in second.2'storage: means and which. s -encrypted-with -a first.public key.to.the second secret key encrypted with the .third pdblic. key .A key management server deviCe:,includes .reception means for receiving the generated. re-encryption key from the Master key management device while the master key managementdeviCe.and the-key manageMent server 'device are connected to,each other, and third storage means for storing the received-re encryption key.- The master key management device and the key management server-deviceare .disconnected after-there-encryption key is stored in the third storage:</p> |
