Electrical computers and digital processing systems: support – Data processing protection using cryptography – By stored data protection
Patent
1997-07-17
2000-01-11
Gregory, Bernarr E.
Electrical computers and digital processing systems: support
Data processing protection using cryptography
By stored data protection
713189, 713200, 380277, 380278, H04L 900, H04L 908
Patent
active
060147458
ABSTRACT:
Proprietary information such as programs and/or data are protected using a secure processing system that includes a memory such as an EPROM in which the proprietary information is stored in a first portion of the memory. The stored information is encrypted by an encryption algorithm unique to the proprietor of the information. The stored information is assigned an unique key that will enable the information to be decrypted if the unique algorithm is known. A second portion of the memory has the unique key stored therein, the unique key is encrypted with a master encryption algorithm and can only be obtained by using a master key with the master algorithm. A processing unit such as a Digital Signal Processor (DSP) has both the proprietor's unique algorithm, master algorithm and master key available to it. The processing unit can retrieve the information from the memory and execute it after decrypting the unique key using the master algorithm and the master key and then decrypting the information using the unique algorithm and the unique key.
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Gregory Bernarr E.
Robinson Richard K.
Silicon Systems Design Ltd.
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