With the rapid development of the internet, copying a digital document is so easy and economically affordable that digital piracy is rampant. As a result, software protection has become a vital issue in current computer industry and a hot research topic. Software watermarking and obfuscation are techniques to protect software from unauthorized access, modification, and tampering. While software watermarking tries to insert a secret message called software watermark into the software program as evidence of ownership, software obfuscation translates software into a semantically- equivalent one that is hard for attackers to analyze. In this thesis, firstly, we present a survey of software watermarking and obfuscation. Then we formalize two impor- tant concepts in software watermarking: extraction and recognition and we use a concrete software watermarking algorithm to illustrate issues in these two concepts. We develop a technique called the homomorphic functions through residue numbers to obfuscate variables and data structures in software programs. Lastly, we explore the complexity issues in software watermarking and obfuscation.
Identifer | oai:union.ndltd.org:ADTP/274722 |
Date | January 2007 |
Creators | Zhu, William Feng |
Publisher | ResearchSpace@Auckland |
Source Sets | Australiasian Digital Theses Program |
Language | English |
Detected Language | English |
Rights | Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated., http://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm, Copyright: The author |
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