Instruction sequence verification to protect secured data

Details Instruction sequence verification to protect secured data Instruction sequence verification to protect secured data

2008-01-29

2008-01-29

Dildine, R. Stephen (Department: 2112)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C726S022000, C726S023000

Reexamination Certificate

active

07325165

ABSTRACT:
Intended for an information security application, particularly in networked information systems, the present invention includes two methods and systems for verifying a current performance of a command by a controller. A first cyclic redundancy check (CRC) for the command is prestored in memory. A second CRC for the command is calculated after instructions of the command have been performed by the controller. The first CRC is compared with the second CRC. Preferably, the controller is reset if the first CRC does not match the second CRC. Also, an address of a first instruction of the command is compared with an address of a second instruction of the command to determine if there may be a discontinuity between the first and the second instructions. It is determined if the first instruction is a valid instruction from/to which an instruction sequence of the command can be redirected. Preferably, the controller is reset if the first instruction is not a valid instruction from/to which the instruction sequence can be redirected.

REFERENCES:
patent: 6223320 (2001-04-01), Dubey et al.
patent: 6678837 (2004-01-01), Quach et al.
patent: 6697948 (2004-02-01), Rabin et al.
patent: 2001/0030617 (2001-10-01), Cusey
patent: 2003/0051133 (2003-03-01), Pearson
patent: 2004/0250126 (2004-12-01), Baer et al.
patent: 61000846 (1986-01-01), None
patent: 03098132 (1991-04-01), None
Dierks, T. and Allen, C.,The TLS Protocol Version 1.0, Network Working Group Request for Comments No. 2246, from www.ietf.org/rfc/rfc2246.txt, 75 pages, Jan. 1999.

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