FILE SERVER DEVICE AND FILE SERVER SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a file server device and a file server system which can make use of a dedicated public key, reduce the number of keys managed by a user, and keep confidential data contents secret.

SOLUTION: Reception means receives server use encrypted data obtained by encrypting data using a server use public key from a sender device. Re-encryption key storage means stores a re-encryption key used for re-encrypting the server use encrypted data into recipient use encrypted data obtained by encrypting data using a recipient use public key which differs from the server use public key. Re-encryption means re-encrypts the received server use encrypted data into recipient use encrypted data using the re-encryption key stored by the re-encryption key storage means. Transmission means transmits the re-encrypted recipient use encrypted data to a recipient device.

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