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Information Technology Journal
Year: 2014  |  Volume: 13  |  Issue: 2  |  Page No.: 251 - 259

A Client-side Fingerprinting Method for Text Document Distribution

Hui Peng, Gang Luo and Lingyun Xiang    

Abstract: In this study, a new method that joint fingerprinting and decryption at the client side is proposed for the electronic distribution of text documents. In mass-scale electronic distribution systems fingerprint embedding primarily at the server which may lead to computational load of server and bandwidth burden. Fingerprinting at the client side will reduce the embedding complexity and bandwidth usage but it is easy to pose a threat to security on the fingerprint information and the protected content. It will be a challenge to design a client-side embedding method which will not leak the embedding secrets or original content. Some client-side embedding methods have been proposed for images, video and other media which contain enough redundancy information and allow various processions. But for text documents, to overcome this challenge will be more difficult. In this study, by giving each user a personalized coding dictionary which constructed based on synonym substitution, only one encoded and encrypted copy needs to be sent by the server and fingerprint embedding is jointed with decryption at the client side. Theoretical analysis and experimental results prove its practice.

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