Information security – Prevention of unauthorized use of data including prevention... – Access control
Reexamination Certificate
2011-04-26
2011-04-26
LaForgia, Christian (Department: 2439)
Information security
Prevention of unauthorized use of data including prevention...
Access control
C726S002000, C726S009000, C726S020000, C726S022000, C726S026000, C726S030000, C726S034000, C726S035000, C713S002000, C713S002000, C713S165000, C713S172000, C713S187000, C713S189000, C713S193000, C713S194000, C713S400000, C714S012000, C714S036000, C714S041000, C714S048000, C714S049000, C714S052000
Reexamination Certificate
active
07934265
ABSTRACT:
The present invention relates to a coprocessor comprising a calculation unit for executing a command, and a securization device for monitoring the execution of the command and supplying an error signal having an active value as soon as the execution of the command begins and an inactive value at the end of the execution of the command, if no abnormal progress in the execution of the command has been detected. The coprocessor further comprises means for preventing access to at least one unit of the coprocessor, while the error signal is on the active value. Application is provided particularly but not exclusively to the protection of integrated circuits for smart cards against attacks by fault injection.
REFERENCES:
patent: 4760575 (1988-07-01), Watanabe
patent: 4996691 (1991-02-01), Wilcox et al.
patent: 5184032 (1993-02-01), Leach
patent: 5357146 (1994-10-01), Heimann
patent: 5659678 (1997-08-01), Aichelmann et al.
patent: 5694402 (1997-12-01), Butler et al.
patent: 5949798 (1999-09-01), Sakaguchi
patent: 5974529 (1999-10-01), Zumkehr et al.
patent: 6205559 (2001-03-01), Sakaguchi
patent: 6357024 (2002-03-01), Dutton et al.
patent: 6424926 (2002-07-01), Mak
patent: 6457145 (2002-09-01), Holmberg et al.
patent: 6549022 (2003-04-01), Cole et al.
patent: 6601008 (2003-07-01), Madge
patent: 6654465 (2003-11-01), Ober et al.
patent: 6714032 (2004-03-01), Reynick
patent: 6751749 (2004-06-01), Hofstee et al.
patent: 6766485 (2004-07-01), Sakaguchi
patent: 7168065 (2007-01-01), Naccache et al.
patent: 2002/0133773 (2002-09-01), Richter et al.
patent: 2003/0085621 (2003-05-01), Potega
patent: 2003/0204801 (2003-10-01), Tkacik et al.
patent: 2003/0226082 (2003-12-01), Kim et al.
patent: 2004/0139346 (2004-07-01), Watt et al.
patent: 2005/0273848 (2005-12-01), Charles et al.
patent: 2006/0267653 (2006-11-01), Fulkerson
patent: 2 746 199 (1997-09-01), None
patent: 10-91531 (1998-04-01), None
Bancel Frédéric
Berard Nicolas
Jackson Jenise E
Jorgenson Lisa K.
Kading Joshua A.
LaForgia Christian
Seed IP Law Group PLLC
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