Congratulations to Chris Culnane for successfully passing his MPhil to PhD transfer
Monday 14 April 2008
Chris successfully transferred on Friday 11th April with his work titled "Authenticating Binary Watermarking Robust to Printing and Scanning". Chris is supervised by Dr Helen Treharne and Professor Anthony TS Ho and was examined by Professor Keith Martin (Royal Holloway, University of London) and Dr Hans Georg Schaathun.
Abstract:
The presentation will provide an introduction to Binary Text Watermarking followed by a discussion and demonstration of our recent work in the field. An overview of our continuous line multi-set embedding technique will be provided. The focus of the presentation will be our authentication and localisation scheme to produce a watermark which can be embedded in a limited capacity binary text document and that will work in a print and scan environment. The scheme utilises Message Authentication Codes (MAC), specifically OMACs, which create a cryptographic fixed-length summary of a document. The OMAC is truncated to form part of our watermark, with the other part being used for localisation of errors. We have created over 2,000,000 watermarks in controlled experiments to evaluate the effective of the localisation and authentication scheme. In addition, we have embedded an authenticating watermark into seven different documents and authenticated them after printing and scanning.