07100050 is referenced by 10 patents and cites 16 patents.

A watermarking scheme is provided that allows the watermarked image to be authenticated by an authentication agent without revealing the human-readable content of the image. There is disclosed an approach that combines privacy control with watermarking and authentication mechanisms. The watermark can be made to be imperceptible to humans. Public key cryptography allows the authentication agent to authenticate without being able to watermark an image. Watermark information may also be encoded in a vector graphics image that includes at least one stroke defined by coordinate values of an ordered sequence of points. This may be obtained by providing watermark information as a bit sequence, identifying one or more redundant properties of the image, modifying the redundant properties based upon the bit sequence to generate a representation of the image and storing the representation of the image for subsequent use.

Title
Secured signal modification and verification with privacy control
Application Number
9/571359
Publication Number
7100050 (B1)
Application Date
May 15, 2000
Publication Date
August 29, 2006
Inventor
Minerva Ming Yee Yeung
Sunnyvale
CA, US
Chai Wah Wu
Poughquag
NY, US
Samuel M Weber
New York
NY, US
Charles P Tresser
Mamaroneck
NY, US
Frederick C Mintzer
Shrub Oak
NY, US
Don Coppersmith
Ossining
NY, US
Agent
McGinn IP Law Group PLLC
Jesse L Abzug Esq
Assignee
International Business Machines Corporation
NY, US
IPC
H04N 7/16
H04L 9/00
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