公开(公告)号：JP2000083159A

公开(公告)日：2000-03-21

申请号：JP10088799

申请日：1999-04-08

Applicant: IBM

Inventor： COPPERSMITH DON ,  MINTZER FREDERICK COLE ,  TRESSER CHARLES P ,  WU CHAI WAH ,  YEUNG MINERVA MING-YEE

IPC: G06F21/10 ,  G06T1/00 ,  G09C1/00 ,  G09C5/00 ,  H04L9/32 ,  H04N1/32 ,  H04N1/387 ,  H04N7/08 ,  H04N7/081 ,  H04N21/2389 ,  H04N21/8358

Abstract: PROBLEM TO BE SOLVED: To fulfill a requirement according to an intended use and to obtain as inconspicuous, safe and quick water-marking as possible by converting a water-marked edition by using an identified privacy encoding method and extracting a water-mark from the privacy coded water-marked edition of a source data set. SOLUTION: Privacy control 202 is added to source data 201. Thus, authentication can be attained, and simultaneously the privacy of the content of a data set can be protected. Then, water-marking algorithm is applied (203). Thus, privacy reinforced water-marked data 204 can be obtained. The water-mark is present in an image so that only the least significant bit of the image can be affected, and the maximum picture quality protection can be attained. An authenticated result 212 can be obtained from the privacy reinforced water- marked data 204.

公开(公告)号：JPH10208026A

公开(公告)日：1998-08-07

申请号：JP33675797

申请日：1997-12-08

Applicant: IBM

Inventor： MINTZER FREDERICK COLE ,  YEUNG MINERVA MING-YEE

IPC: H04N1/44 ,  G06T1/00 ,  G06T7/00 ,  G09C5/00 ,  H04N1/32 ,  H04N1/387 ,  H04N7/08 ,  H04N7/081 ,  H04N7/30

Abstract: PROBLEM TO BE SOLVED: To verify that contents of a picture are not changed after being stamped by discriminating alteration of the stamped picture at the time extracted stamping information is unmatching with source stamping information. SOLUTION: A picture server 108 verifies the integrity of picture data stored in a picture archive 106. That is, a source picture 104 stamped from the archive is selected, and each information is read into a calculation device after a verification key 105 corresponding to a picture stamped from a key protection storage device 107 is acquired. In the verification processing, the stamped source picture and the verification key are processed to extract stamping information embedded in the picture. Next, extracted stamping information and stamping information 100 known by the server are compared with each other. If they coincide with each other, it is judged that this picture is not changed after being stamped. This verification result is used to confirm the integrity of contents, and a proper processing is performed if it is verified that contents have been changed.

公开(公告)号：JP2003309559A

公开(公告)日：2003-10-31

申请号：JP2003029283

申请日：2003-02-06

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーション

Inventor： COPPERSMITH DON ,  MINTZER FREDERICK COLE ,  TRESSER CHARLES P ,  WU CHAI WAH ,  YEUNG MINERVA MING-YEE

IPC: G06F21/10 ,  G06T1/00 ,  G09C1/00 ,  G09C5/00 ,  H04L9/32 ,  H04N1/32 ,  H04N1/387 ,  H04N7/08 ,  H04N7/081 ,  H04N21/2389 ,  H04N21/8358

CPC classification number: G06T1/0064 ,  H04N1/32144 ,  H04N1/32213 ,  H04N1/32309 ,  H04N21/23892 ,  H04N21/8358 ,  H04N2201/3214 ,  H04N2201/3215 ,  H04N2201/3225 ,  H04N2201/3226 ,  H04N2201/3233 ,  H04N2201/3235 ,  H04N2201/327

Abstract: PROBLEM TO BE SOLVED: To maintain the perceivability as to a watermarked data set I made by embedding a watermark in a source data set I, and also to allow an authenticator to precisely authenticate the contents of I while keeping it secret to him. SOLUTION: Bits constituting the watermark data set I are divided into the least significant bit and other superordinate bits. The superordinate bits I t are extracted from I. I s =f 2 (I t ) as an encrypted version or a hash version of It is generated. Watermark I 1 =V(I s ) is calculated. The watermark data set I is obtained by inserting I 1 into the least significant bit of I. The authenticator receives I s and I 1 from an authentication requester, and calculates I 1 '=V(I s ), and compares I 1 ' with I 1 . COPYRIGHT: (C)2004,JPO

Abstract translation: 要解决的问题：为了保持对通过在源数据集I中嵌入水印而做出的水印数据集的可感知性，并且还允许认证者精确地认证I的内容，同时保持对其的秘密 。 解决方案：构成水印数据集I的位被分成最低有效位和其他上位。 上级位I t 作为加密的数据从I I / SB> = f 2（SBB）中提取 版本或哈希版本的生成。 计算水印I 1 = V（I s ）。 水印数据集I通过将I 1 插入到I的最低有效位中来获得。认证器从一个I / S> S 和I 1 认证请求者，并且计算I 1 '= V（I s ），并将I 1 与I 1 。 版权所有（C）2004，JPO

公开(公告)号：JP2002314799A

公开(公告)日：2002-10-25

申请号：JP2002025323

申请日：2002-02-01

Applicant: IBM

Inventor： MINTZER FREDERICK COLE ,  YEUNG MINERVA MING-YEE

IPC: H04N1/44 ,  G06T1/00 ,  G06T7/00 ,  G09C5/00 ,  H04N1/32 ,  H04N1/387 ,  H04N7/08 ,  H04N7/081 ,  H04N7/30

Abstract: PROBLEM TO BE SOLVED: To provide a system which quickly verifies that the content of an image has not been changed since an earlier time, when the content of that image was stamped. SOLUTION: The system consists of a stamping process that embeds stamping information into a source image and produces a verification key, and a verification process that extracts stamping information from a stamped source image based on the verification key. Furthermore, the verification process produces an image itself, from which the verification can be readily judged visually or by the use of a computer or other display device. In the verification process, the changes in an image can be detected and localized. In the stamping process, an image is safeguarded against malicious manipulations, and the proprietary rights are protected by maintaining the integrity of the image content.

公开(公告)号：DE69941043D1

公开(公告)日：2009-08-13

申请号：DE69941043

申请日：1999-04-09

Applicant: IBM

Inventor： COPPERSMITH DON ,  MINTZER FREDERICK COLE ,  TRESSER CHARLES P ,  WU CHAI WAH ,  YEUNG MINERVA MING-YEE

IPC: H04N1/32 ,  G06F21/10 ,  G06T1/00 ,  G09C1/00 ,  G09C5/00 ,  H04L9/32 ,  H04N1/387 ,  H04N7/08 ,  H04N7/081 ,  H04N21/2389 ,  H04N21/8358

Abstract: A watermarking scheme which 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 which 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.

公开(公告)号：DE69730109D1

公开(公告)日：2004-09-09

申请号：DE69730109

申请日：1997-12-19

Applicant: IBM

Inventor： MINTZER FREDERICK COLE ,  YEUNG MINERVA MING-YEE

IPC: H04N1/44 ,  G06T1/00 ,  G06T7/00 ,  G09C5/00 ,  H04N1/32 ,  H04N1/387 ,  H04N7/08 ,  H04N7/081 ,  H04N7/30 ,  G06T11/00

Abstract: A system quickly verifies that the content of an image has not been changed since an earlier time when the content of that image was stamped. The system consists of a stamping process that embeds stamping information into a source image and produces a verification key, and a verification process that extracts stamping information from a stamped source image based on the verification key. Furthermore, the verification process produces an image itself, from which the verification can be readily judged visually or by use of a computer or other display device. In the verification process, the changes in an image can be detected and localized. The image stamping process further includes an error diffusion process so that the effects of combining the stamping information with the original image are not readily perceptable. An image is safeguarded against malicious manipulations and the proprietary rights are protected by maintaining the integrity of the image content.

公开(公告)号：DE69730109T2

公开(公告)日：2005-08-11

申请号：DE69730109

申请日：1997-12-19

Applicant: IBM

Inventor： MINTZER FREDERICK COLE ,  YEUNG MINERVA MING-YEE

IPC: H04N1/44 ,  G06T1/00 ,  G06T7/00 ,  G09C5/00 ,  H04N1/32 ,  H04N1/387 ,  H04N7/08 ,  H04N7/081 ,  H04N7/30 ,  G06T11/00

Abstract: A system quickly verifies that the content of an image has not been changed since an earlier time when the content of that image was stamped. The system consists of a stamping process that embeds stamping information into a source image and produces a verification key, and a verification process that extracts stamping information from a stamped source image based on the verification key. Furthermore, the verification process produces an image itself, from which the verification can be readily judged visually or by use of a computer or other display device. In the verification process, the changes in an image can be detected and localized. The image stamping process further includes an error diffusion process so that the effects of combining the stamping information with the original image are not readily perceptable. An image is safeguarded against malicious manipulations and the proprietary rights are protected by maintaining the integrity of the image content.