Cryptography – By modifying optical image
Reexamination Certificate
2006-04-25
2006-04-25
Song, Hosuk (Department: 2135)
Cryptography
By modifying optical image
C382S232000
Reexamination Certificate
active
07035409
ABSTRACT:
Multiple transform utilization and applications for secure digital watermarking. In one embodiment of the present invention, digital blocks in digital information to be protected are transformed into the frequency domain using a fast Fourier transform. A plurality of frequencies and associated amplitudes are identified for each of the transformed digital blocks and a subset of the identified amplitudes is selected for each of the digital blocks using a primary mask from a key. Message information is selected from a message using a transformation table generated with a convolution mask. The chosen message information is encoded into each of the transformed digital blocks by altering the selected amplitudes based on the selected message information.
REFERENCES:
patent: 4200770 (1980-04-01), Hellman et al.
patent: 4218582 (1980-08-01), Hellman et al.
patent: 4405829 (1983-09-01), Rivest et al.
patent: 4424414 (1984-01-01), Hellman et al.
patent: 4827508 (1989-05-01), Shear
patent: 4977594 (1990-12-01), Shear
patent: 4979210 (1990-12-01), Nagata et al.
patent: 5050213 (1991-09-01), Shear
patent: 5073925 (1991-12-01), Nagata et al.
patent: 5410598 (1995-04-01), Shear
patent: 5530739 (1996-06-01), Okada et al.
patent: 5613004 (1997-03-01), Cooperman et al.
patent: 5664018 (1997-09-01), Leighton
patent: 5832119 (1998-11-01), Rhoads
patent: 6205249 (2001-03-01), Moskowitz
patent: 6611599 (2003-08-01), Natarajan
U.S. Appl. No. 08/587,943, “Method for Stega-Cipher Protection of Computer Code”.
U.S. Appl. No. 08/775,216, “Steganographic Method and Device”.
U.S. Appl. No. 08/587,944, “Human Assisted Random Key Generation . . . ”.
U.S. Appl. No. 08/677,435, “Optimization Methods for the Insertion, Protection and . . . ”.
U.S. Appl. No. 08/772,222, “Z-Transform Implementation of Digital Watermarks”.
Fabien A.P. Peticolas, Ross J. Anderson and Markkus G. Kuhn, “Attacks on Copyright Marking Systems,” Dec. 1997.
Joseph J.K. O Ruanaidh and Thierry Pun, “Rotation, Scale and Translation Invariant Digital Image Watermarking”.
Scott Craver et al., “Can Invisible Watermarks Resolve Rightful Ownership?,” (Jul. 25, 1996).
Ross Anderson, “Stretching the Limits of Steganography”.
Joseph Ruanaidh, Rotation, Scale and Translation Invariant Digital Image Watermarking, IEEE conference, pp. 1-4.
Fabien A.P. Peticolas, Ross J. Anderson and Markkus G. Kuhn, “Attacks on Copyright Marking Systems,” Dec. 1997.
Scott Craver et al., “Can Invisible Watermarks Resolve Rightful Ownership?,” Jul. 25, 1996.
Ross Anderson, “Stretching the Limits of Steganography”.
Delaigle, J.F., et al., “Digital Watermarking,” Proceedings of the SPIE, vol. 2659, Feb. 1, 1996, pp. 99-110, Abstract.
Schnieder, M. et al., “Robust Content Based Digital Signature For Image Authentication,” Proceedings of the Int'l. Conf. on Image Processing , Sep. 16-19, 1996 vol. 3, 16 , pp. 227-230.
Cox, I.J. et al., “Secure Spread Spectrum Watermarking for Multimedia,” IEEE Transactions On Image Processing, vol. 6, No. 12, Dec. 1, 1997, pp. 1673-1686.
Cox, I.J. et al., “Secure Spread Spectrum Watermarking for Multimedia,” NEC Research Institute, Technical Report 95-10, pp. 1-33.
Wong, Ping Wah, “A Public Key Watermark for Image Verification and Authentication,” IEEE Int'l. Conf. on Image Processing, vol. 1, Oct. 4-7, 1998, pp. 455-459.
LandOfFree
Multiple transform utilization and applications for secure... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multiple transform utilization and applications for secure..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple transform utilization and applications for secure... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3529801