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Machine translation
1. (WO2001023981) AUTHENTIFICATION OF DIGITAL DATA WORKS USING SIGNATURES AND WATERMARKS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2001/023981    International Application No.:    PCT/GB2000/003712
Publication Date: 05.04.2001 International Filing Date: 28.09.2000
Chapter 2 Demand Filed:    24.04.2001    
IPC:
G06F 1/00 (2006.01), G06F 21/00 (2006.01), G06T 1/00 (2006.01)
Applicants: SIGNUM TECHNOLOGIES LIMITED [GB/GB]; 6 Thorney Leys Business Park, Witney, Oxford OX8 7GE (GB) (For All Designated States Except US).
HILTON, David [GB/GB]; (GB) (For US Only)
Inventors: HILTON, David; (GB)
Agent: ORIGIN LIMITED; 52 Muswell Hill Road, London N10 3JR (GB)
Priority Data:
9922904.9 28.09.1999 GB
Title (EN) AUTHENTIFICATION OF DIGITAL DATA WORKS USING SIGNATURES AND WATERMARKS
(FR) AUTHENTIFICATION DE DONNEES NUMERIQUES A L'AIDE DE SIGNATURES ET DE FILIGRANES
Abstract: front page image
(EN)A method of authenticating a digital data work, to enable its integrity or authenticity to be established, is taught. The method envisages calculating a unique signature for the unaltered work and embedding that signature in some manner back into the unaltered work in a way that actually changes the work itself.
(FR)L'invention concerne un procédé d'authentification de données numériques pour valider l'intégrité ou l'authenticité à établir. Ce procédé consiste à calculer une signature unique pour les données non altérées et à réintégrer cette signature dans les données non altérées d'une manière qui les modifie elles-mêmes.
Designated States: AU, JP, US.
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE).
Publication Language: English (EN)
Filing Language: English (EN)