Electrical computers and digital processing systems: support – Data processing protection using cryptography
Reexamination Certificate
2007-07-31
2007-07-31
Arani, Taghi T. (Department: 2131)
Electrical computers and digital processing systems: support
Data processing protection using cryptography
C713S180000, C713S193000, C713S194000, C713S300000, C708S250000, C708S270000
Reexamination Certificate
active
10488001
ABSTRACT:
The secure integrated circuit (1) further includes storage means (2) in which confidential data is stored, such as an encryption programme and at least an encryption key, and a microprocessor unit (3) for executing the encryption programme. Said circuit further includes an oscillator stage (4, 5) supplying clock signals (CLK) in particular for clocking the sequence of operations in the microprocessor unit (3), and a random number generator (6) connected to the microprocessor unit. A random number (RNGosc) generated by the random number generator is supplied to the input of the oscillator stage to configure it such that the frequency of the clock signals supplied by the oscillator stage depends on said random number. The oscillator stage includes an RC type oscillator, in which a certain number of resistors and/or capacitors can be selected by the random number introduced at the input of the oscillator stage. So the frequency of clock signals depends on the RC component selected as a function of said received random number.
REFERENCES:
patent: 3293570 (1966-12-01), Nielsen
patent: 4575621 (1986-03-01), Dreifus
patent: 4764666 (1988-08-01), Bergeron
patent: 4855690 (1989-08-01), Dias
patent: 5404402 (1995-04-01), Sprunk
patent: 5581615 (1996-12-01), Stern
patent: 5781458 (1998-07-01), Gilley
patent: 5944833 (1999-08-01), Ugon
patent: 6327661 (2001-12-01), Kocher et al.
patent: 6807553 (2004-10-01), Oerlemans
patent: 2002/0166058 (2002-11-01), Fueki
patent: 497 618 (1992-08-01), None
patent: 2 784 763 (2000-04-01), None
patent: WO 97 33217 (1997-09-01), None
patent: WO 99 63696 (1999-12-01), None
patent: WO 00 07142 (2000-02-01), None
Blangy Hugues
Pevec Albin
Arani Taghi T.
EM Microelectronic-Marin SA
Sughrue & Mion, PLLC
LandOfFree
Secure integrated circuit including parts having a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Secure integrated circuit including parts having a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Secure integrated circuit including parts having a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3786740