Electronic digital logic circuitry – Security
Reexamination Certificate
2008-05-13
2008-05-13
Le, Don (Department: 2819)
Electronic digital logic circuitry
Security
C326S046000, C326S093000
Reexamination Certificate
active
07372290
ABSTRACT:
A secure device includes a memory capable of storing information. The secure device also includes a secure microcontroller capable of securing the information in the memory. The secure microcontroller includes a plurality of registers. The secure microcontroller also includes combinatorial logic capable of receiving at least one output value provided by at least one of the registers. The combinatorial logic is also capable of performing one or more combinatorial operations using the at least one received output value. In addition, the secure microcontroller includes dummy cycle circuitry capable of causing one or more of the registers and the combinatorial logic to change state and consume current during one or more dummy cycles.
REFERENCES:
patent: 5944833 (1999-08-01), Ugon
patent: 6247134 (2001-06-01), Sproch et al.
patent: 6804782 (2004-10-01), Qiu et al.
patent: 6907534 (2005-06-01), Ku
patent: 2003/0005340 (2003-01-01), Ku
patent: 2004/0233749 (2004-11-01), Fujisaki
patent: 2006/0265570 (2006-11-01), Bancel et al.
patent: 1 006 492 (2000-06-01), None
Fruhauf Serge F.
Pomet Alain C.
Jorgenson Lisa K.
Le Don
Munck William A.
STMicroelectronics Inc.
STMicroelectronics S.A.
LandOfFree
System and method for using dummy cycles to mask operations... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for using dummy cycles to mask operations..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for using dummy cycles to mask operations... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2790161