Partially encrypted bitstream method

Details Partially encrypted bitstream method Partially encrypted bitstream method

2006-06-06

2006-06-06

Moise, Emmanuel L. (Department: 2137)

Cryptography

Particular algorithmic function encoding

C713S189000, C326S038000

Reexamination Certificate

active

07058177

ABSTRACT:
It is sometimes desirable to encrypt a design for loading into a PLD so that an attacker may not learn and copy the design as it is being copied into the PLD. According to the invention, a method for generating a bitstream for storing an encrypted design begins by generating an unencrypted bitstream including bits representing the design and bits that control loading of the design. The bits representing the design are encrypted and are combined with the bits that control loading, which are not encrypted.

REFERENCES:
patent: 5081675 (1992-01-01), Kittirutsunetorn
patent: 5121359 (1992-06-01), Steele
patent: 5321704 (1994-06-01), Erickson
patent: 5341034 (1994-08-01), Matthews
patent: 5367658 (1994-11-01), Spear et al.
patent: 5388157 (1995-02-01), Austin
patent: 5434969 (1995-07-01), Heilveil et al.
patent: 5651127 (1997-07-01), Gove et al.
patent: 5705938 (1998-01-01), Kean
patent: 5764076 (1998-06-01), Lee et al.
patent: 5838901 (1998-11-01), Curd et al.
patent: 5892961 (1999-04-01), Trimberger
patent: 5914616 (1999-06-01), Young et al.
patent: 5931959 (1999-08-01), Kwiat
patent: 5940610 (1999-08-01), Baker et al.
patent: 5970142 (1999-10-01), Erickson
patent: 5995120 (1999-11-01), Dye
patent: 6002411 (1999-12-01), Dye
patent: 6028939 (2000-02-01), Yin
patent: 6067098 (2000-05-01), Dye
patent: 6091430 (2000-07-01), Bodin et al.
patent: 6108014 (2000-08-01), Dye
patent: 6118869 (2000-09-01), Kelem et al.
patent: 6172520 (2001-01-01), Lawman et al.
patent: 6185629 (2001-02-01), Simpson et al.
patent: 6212639 (2001-04-01), Erickson et al.
patent: 6246768 (2001-06-01), Kim
patent: 6323679 (2001-11-01), Robertson et al.
patent: 6326806 (2001-12-01), Fallside et al.
patent: 6366117 (2002-04-01), Pang et al.
patent: 6426762 (2002-07-01), Nason et al.
patent: 6433799 (2002-08-01), Nason et al.
patent: 6437809 (2002-08-01), Nason et al.
patent: 6441641 (2002-08-01), Pang et al.
patent: 6480954 (2002-11-01), Trimberger et al.
patent: 6560709 (2003-05-01), Galovich
patent: 6654889 (2003-11-01), Trimberger
patent: 2001/0015919 (2001-08-01), Kean
patent: 2001/0032318 (2001-10-01), Yip et al.
patent: WO 00/49717 (2000-08-01), None
Xilinx Application Note, “Configuration Issues: Power-Up, Volatility, Security, Battery Back-Up”, XAPP 092, Nov. 24, 1997 (Version 1.1).
Virtex Configuration Guide, published by Xilinx, Inc., 2100 Logic Drive, San Jose, CA 95124, Oct. 9, 2000 (Version 1.0).
Bruce Schneier “Applied Cryptography: Protocols, Algorithms, and Source Code in C”, Second Edition, Copyright 1996, published by John Wiley & Sons, Inc.; Chapter 9, pp. 193-194 and 200-203; Chapter 12, pp. 265-301 and Chapter 15, pp. 360-361.
Cahners EDN Access Web Page, “Cunning circuits confound crooks,” Oct. 12, 2000; pp. 1-8; http://www.ednmag.com/ednmag/reg/2000/10122000/21df2.htm.
Xilinx, Application Note, XAPP138, “Virtex FPGA Series Configuration and Readback”, published Oct. 4, 2000, available from Xilinx, Inc., 2100 Logic Drive, San Jose, California 95124.
U.S. Appl. No. 09/724,865, filed Nov. 28, 2000, Trimberger et al.
U.S. Appl. No. 09/724,652, filed Nov. 28, 2000, Pang et al.
U.S. Appl. No. 09/724,975, filed Nov. 28, 2000, Pang et al.
U.S. Appl. No. 09/724,873, filed Nov. 28, 2000, Pang et al.
U.S. Appl. No. 09/724,734, filed Nov. 28, 2000, Trimberger et al.
U.S. Appl. No. 09/724,972, filed Nov. 28, 2000, Trimberger et al.
ARM; Versatile FPGA and PLD configuration images, update Sep. 13, 2004, p. 1 of 1, available at http://www.arm.com/support/downloads/info/4804.html.
Xilinx, Inc., News Release, Sep. 20, 1999, pp 1-2, available at http://investor.xilinx.com/phoenix.zhtml?c=75919&p=irol-newsArticle&t=Regular&id=5214 . . . .

Affiliated with

Also associated with

Rating

Partially encrypted bitstream method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Partially encrypted bitstream method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Partially encrypted bitstream method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3657771