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Dynamic mapping software watermarking algorithm based on tamper-resistant technology

Author: LiuMeng
Tutor: LiShuZhi
School: Jiangxi University of Technology
Course: Applied Computer Technology
Keywords: Software Watermarking Dynamic Figure Tamper-resistant technology Watermark split
CLC: TP309.7
Type: Master's thesis
Year: 2011
Downloads: 27
Quote: 0
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Abstract


With the increasingly serious phenomenon of software piracy , software watermarking technology more and more attention . In order to protect the software , in recent years, the emergence of a number of software watermarking algorithm , in particular, is a dynamic software watermarking algorithm . In this paper, to elaborate several dynamic mapping software watermarking technology , analyze their strengths and weaknesses and improvements proposed two improved dynamic mapping software watermarking algorithm . The main research work are as follows : ( 1 ) describes four dynamic graph software watermark encoding , and analysis of the advantages and disadvantages of these four encoding . Watermark tamper-resistant technology , a dynamic graph software watermark algorithm based on the the PPT (Parent-Pointer Tree) encoding . The algorithm first advantage the different hexadecimal data in the form can be transformed into each other thoughts , watermark information is divided into a plurality of small watermark information , i.e. the watermark division processing , and then these small watermark information is arranged into a set containing the parent pointer FIG structure, and dynamically embedded into the object program. Proved by experimental data , the algorithm has a strong advantage in the hidden watermark and recoverability , compared to PPCT (Planted Plane Cubic Tree) encoding , the algorithm of the watermark data rate is higher , and the watermark coding simple and convenient. ( 2) to the extent permitted by watermarking system complexity analysis improvements based the PPT coded dynamic mapping software watermarking algorithm is proposed dynamic graph software watermark algorithm based on variable tamper-resistant . The algorithm mainly do two improvements watermark encoding , it makes the watermark data rate greatly improved ; watermark tamper-resistant technology , to expand the scope of the watermark tamper-resistant features . Simulation experimental data shows that the algorithm has a good ability to watermarking against attacks , and the watermark data rate is even higher than the the Enhanced the PPCT algorithm of data rate . Compared to the first algorithm watermarking algorithm complexity is high , but the better performance of the watermarking system . ( 3 ) a summary description of the full text and proposed the two watermarking algorithm further research direction . This paper presents two watermarking algorithm has greatly improved the watermark data rates and tamper-proof capabilities , two good watermarking algorithm . Next focus on improved watermark representation , the watermark pretreatment methods and anti- tampering program .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > General issues > Security and confidentiality > Encryption and decryption
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