Data processing apparatus with software protecting functions
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United States of America Patent
Stats
-
Jun 22, 1999
Grant Date -
N/A
app pub date -
Jan 15, 1997
filing date -
Jan 17, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A data processing apparatus with software protecting functions capable of enhancing the level of encryption security independently of the memory management method of the system comprising the apparatus. Upon receiving target data to be encrypted, an encryption key generation unit generates an encryption key in accordance with an attribute of the target data. Using the encryption key, an encryption unit encrypts the target data. The encrypted data is placed into a storage unit. When a request is made to process the encrypted data, a decryption key generation unit generates a decryption key in accordance with the attribute of the encrypted data. A decryption unit decrypts the encrypted data using the decryption key. The decrypted data is processed by a processing unit. A control unit supplies the encryption unit with the data processed by the processing unit as data to be encrypted.
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