DocumentCode :
706327
Title :
A practical protocol for digital and printed document authentication
Author :
Vinicius Koerich Borges, Paulo ; Mayer, Joceli ; Izquierdo, Ebroul
Author_Institution :
Dept. of Electron. Eng., Queen Mary Univ. of London, London, UK
fYear :
2007
fDate :
3-7 Sept. 2007
Firstpage :
2529
Lastpage :
2533
Abstract :
This paper discusses a practical protocol for text document authentication, applicable to digital and printed form documents. It uses the text characters information to determine a key used to generate an authentication vector. Based on this vector, a feature in each character of the document is modified, without affecting the character “meaning.” The modifiable feature may be size, color, shape, relative position, among others. If any character on the text is changed, the character information is different and consequently the authentication vector is also different. The proposed system does not require database retrieval and it is extremely difficult to forge the authentication process. A correlation-based detector for the system is proposed, and because feature detection errors may occur, an analysis is performed to determine the false alarm error probability of the system. Experiments illustrate the applicability of the method, considering the digital and the printed cases.
Keywords :
cryptographic protocols; error statistics; feature extraction; text analysis; correlation-based detector; digital document authentication; false alarm error probability; feature detection; practical protocol; printed document authentication; text document authentication vector; Authentication; Error probability; Modulation; Noise; Protocols; Watermarking;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signal Processing Conference, 2007 15th European
Conference_Location :
Poznan
Print_ISBN :
978-839-2134-04-6
Type :
conf
Filename :
7099264
Link To Document :
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