06061449 is referenced by 227 patents and cites 3 patents.

A scrambled data transmission is descrambled by communicating encrypted program information and authentication information between an external storage device and block buffers of a secure circuit. The program information is communicated in block chains to reduce the overhead of the authentication information. The program information is communicated a block at a time, or even a chain at a time, and stored temporarily in block buffers and a cache, then provided to a CPU to be processed. The blocks may be stored in the external storage device according to a scrambled address signal, and the bytes, blocks, and chains may be further randomly re-ordered and communicated to the block buffers non-sequentially to obfuscate the processing sequence of the program information. Program information may be also be communicated from the secure circuit to the external memory. The program information need not be encrypted but only authenticated for security.

Title
Secure processor with external memory using block chaining and block re-ordering
Application Number
8/949111
Publication Number
6061449
Application Date
October 10, 1997
Publication Date
May 9, 2000
Inventor
Eric Sprunk
Carlsbad
CA, US
Brant Candelore
San Diego
CA, US
Agent
Ralph F Hoppin
Barry R Lipsitz
Assignee
General Instrument Corporation
PA, US
IPC
H04L 9/28
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