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US 2007/0165864 A1Published application
Encryption device
AssigneeFujitsu Limited
InventorsTakeshi Nagase, Shogo Shibazaki, Shinkichi Gama
Life of this patent
Estimating the term…
Abstract
An encryption/decryption processing unit performs encryption/decryption processing of data transmitted from a host system, and encryption/decryption processing of key data used for encryption/decryption of the data. A key data buffer temporarily stores encrypted key data. A key data buffer temporarily stores unencrypted key data. An external memory interface controls flash memory attached outside, and reads/writes encrypted key data stored in the key data buffer.
Claims7
A device, which performs encryption, comprising:
- an encryption processing unit for encrypting data using key data used as an encryption key;
- an encrypted key data storage unit for storing encrypted key data, which is the key data encrypted by the encryption processing unit;
- an unencrypted key data storage unit for storing unencrypted key data, which corresponds to the encrypted key data stored in the encrypted key data storage unit;
- and
- an encrypted data memory control unit for writing the encrypted key data, stored in the encrypted key data storage unit, in an involatile memory device, by controlling the memory device.
2 more elements
Dependencies are inferred from the claim text.