Cryptography-based low distortion robust data authentication...

Details Cryptography-based low distortion robust data authentication... Cryptography-based low distortion robust data authentication...

2005-06-14

2005-06-14

Vu, Kim (Department: 2135)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C707S793000, C707S793000, C707S793000, C707S793000, C382S251000, C382S253000

Reexamination Certificate

active

06907527

ABSTRACT:
A method (and system) for generating an output file from a source file where benign modifications to a content of the output file still render the output file authentic, includes constructing an index vector from the source file, quantizing the source file, generating an authentication mark from the quantized source file and the index vector, generating an authentication tag by appending the index vector to the authentication mark, and generating the output file by appending the authentication tag to the source file.

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Maria Paula Queluz, “Content-based integrity protection of digital images”, SPIE vol. 3657, Jan. 1999, pp. 85-93.
Bhattacharjee, et al., “Compression Tolerant Image Authentication”, IEEE, 1998.
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Chen, et al., “Preprocessed and postprocessed quantization index modulation methods for digital watermarking”, SPIE vol. 3971, 2000, pp. 48-59.
Hernandez, et al., “Improving Data Hiding by Using Convolutional Codes and Soft-Decision Decoding”, SPIE vol. 3971, 2000, pp. 24-47.
Handbook of Applied Cryptography, Menezes, Von Oorschet & Vanstore, pp. 22-23 and 33.

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