Global Patent Index - EP 1013073 A1

EP 1013073 A1 2000-06-28 - METHOD FOR GENERATING AND VERIFYING DEGITAL WATERMARKS AND FOR EXCHANGING DATA CONTAINING DIGITAL WATERMARKS

Title (en)

METHOD FOR GENERATING AND VERIFYING DEGITAL WATERMARKS AND FOR EXCHANGING DATA CONTAINING DIGITAL WATERMARKS

Title (de)

DIGITALWASSERZEICHENERZEUGUNGS- UND -ÜBERPRÜFUNGSVERFAHREN SOWIE VERFAHREN ZUM AUSTAUSCH VON DIGITALWASSERZEICHEN ENTHALTENDEN DATEN

Title (fr)

PROCEDE DE GENERATION ET DE VERIFICATION DE FILIGRANES NUMERIQUES ET D'ECHANGE DE DONNEES CONTENANT DES FILIGRANES NUMERIQUES

Publication

EP 1013073 A1 (EN)

Application

EP 98947703 A

Priority

  • EP 98947703 A
  • EP 97810708 A
  • IB 9801500 W

Abstract (en)

[origin: EP0905967A1] A method for generating digital watermarks and for exchanging data containing such watermarks is described. The system is based on an watermarking technique which is robust against image transformation techniques such as compression, rotation, translation, and scaling. It uses modulation of the magnitude components in Fourier space and adds/reads a template in the log polar transform of the magnitude components. The template is used for analyzing scaling and rotation. In addition, the system applies cryptographic protocols and public key techniques for both, encoding the watermark and transferring watermarked data. Preferably, an author (ICH) encodes the watermark using an asymmetric cryptographic key pair provided by a public key infrastructure (PKI) and registers the watermarked data at a trusted registration party (ICO) before transmitting the data to a receiving party (IB). The latter can use the public key infrastructure (PKI) for verifying authorship. Transmission between the parties uses data protection provided by the cryptographic keys. <IMAGE>

IPC 1-7 (main, further and additional classification)

H04N 1/32; H04N 7/26

IPC 8 full level (invention and additional information)

H04N 7/26 (2006.01); G06T 1/00 (2006.01); G09C 5/00 (2006.01); H04L 9/30 (2006.01); H04L 29/06 (2006.01); H04N 1/32 (2006.01); H04N 1/387 (2006.01); H04N 1/44 (2006.01)

CPC (invention and additional information)

H04N 1/32154 (2013.01); G06T 1/0064 (2013.01); H04L 9/3247 (2013.01); H04L 63/0442 (2013.01); H04L 63/045 (2013.01); H04N 1/3216 (2013.01); H04N 1/32187 (2013.01); H04N 1/32192 (2013.01); H04N 1/32267 (2013.01); H04N 1/32309 (2013.01); H04N 21/8358 (2013.01); G06T 2201/0052 (2013.01); G06T 2201/0083 (2013.01); H04L 2209/34 (2013.01); H04L 2209/608 (2013.01); H04L 2463/103 (2013.01); H04N 2201/3233 (2013.01); H04N 2201/327 (2013.01); H04N 2201/3278 (2013.01)

Citation (search report)

See references of WO 9917536A1

Designated contracting state (EPC)

AT BE CH DE ES FR GB GR IE IT LI NL SE

EPO simple patent family

EP 0905967 A1 19990331; AU 9453798 A 19990423; CA 2304611 A1 19990408; EP 1013073 A1 20000628; JP 2001518650 A 20011016; WO 9917536 A1 19990408

INPADOC legal status


2003-10-08 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20030401

2000-06-28 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000311

2000-06-28 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH DE ES FR GB GR IE IT LI NL SE