| 摘要 |
According to one embodiment, the user virtual machine includes, a cryptographic key generating module configured to generate a cryptographic key for encrypting data an encryption module configured to encrypt data using the cryptographic key, an information generation module configured to generate information required for decrypting the encrypted data, a monitoring module configured to monitor generation of the cryptographic key, an instructing module configured to instruct the information generation module to generate the information when the monitoring module detects generation of the cryptographic key, and a transmitting module configured to transmit information generated according to instruction from the instructing module to the management virtual machine, and the management virtual machine includes a receiving module configured to receive information transmitted from the transmitting module, and a storing module configured to store the received information the storage apparatus allocated to the management virtual machine.
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