Electrical computers and digital processing systems: support – Data processing protection using cryptography – By stored data protection
Reexamination Certificate
2011-04-12
2011-04-12
Pyzocha, Michael (Department: 2437)
Electrical computers and digital processing systems: support
Data processing protection using cryptography
By stored data protection
C726S026000, C713S194000
Reexamination Certificate
active
07925895
ABSTRACT:
A data management apparatus which includes: a removable storage device; a nonvolatile memory which saves a first conversion key; a first encrypting device which converts a datum to be saved in the storage device into an encrypted datum by the first conversion key; a first writing device which writes the encrypted datum into the storage device; a first reading device which reads the encrypted data; a first decrypting device having a second conversion key which decrypts the encrypted datum by the second conversion key; a second encrypting device having a third conversion key which encrypts the second conversion key by the third conversion key, and converts the second conversion key into a fourth conversion key; a second writing device which writes the fourth conversion key into the storage device; a second reading device which reads the fourth conversion key; and a second decrypting device which decrypts the fourth conversion key.
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Chinese Office Action dated Aug. 3, 2007 with translation.
Notice of Allowance for Japanese Patent Application No. JP 2005-045239 mailed Apr. 6, 2010.
Kanazawa Keizen
Okuda Masaya
Kyocera Mita Corporation
Ostrolenk Faber LLP
Pyzocha Michael
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