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Research on Public Key Digital Watermarking Based on ECC

Author: WangYu
Tutor: JiangJianGuo
School: Xi'an University of Electronic Science and Technology
Course: Applied Computer Technology
Keywords: Digital Watermarking Public key Arnold transformation Elliptic Curve Cryptography Hadamard transform
CLC: TP309.7
Type: Master's thesis
Year: 2008
Downloads: 70
Quote: 0
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Abstract


With digital products copyright protection has become increasingly important digital watermarking as an effective means to solve the problem attracted universal attention . Most of the current research is based on symmetric watermarking model , the algorithm can not open , and watermark can only be extracted by the owner himself . In addition , research is concentrated in the watermark embedding and extraction algorithm , there is little research on watermarking model and implementation of the agreement . In fact, the absence of the model and the implementation of the agreement to do to protect , and then a robust algorithm also amounted to less than effective copyright protection purposes , thereby constraining the practical application of digital watermarking technology . This paper analyzes the the digital watermarking basic principle and the typical algorithm , and put forward the Arnold transform an improved algorithm ; summarizes the a common digital watermark performance assessment method , provided the basis for subsequent watermark performance evaluation ; analysis of the basic theory of elliptic curve cryptography elliptic curve cryptography public key digital watermarking proposed two ways to achieve ; Finally for current symmetric watermarking model , drawing on the thinking of public key cryptography , the public key based on elliptic curve cryptosystem digital watermarking model , and an implementation agreement for the introduction of a central regulatory body is constructed on the basis of the model . The watermarking model proposed in this paper , the watermark verification convenient ability of anti - explanatory attack , and can track the illegal copying and dissemination . Use of elliptic curve public key cryptography algorithm , watermark security processing decryption speed . Arnold transformation algorithm , improved to increase the key space , and to strengthen the security of the algorithm . Use of the second-order Hadamard transform watermark hybrid coding the double watermark embedding and independently extracted , and laid the foundation for the establishment of the model . Experimental results show that the model has a strong robustness to common image processing attacks , the implementation of the agreement has good reliability and practicality . The model of this paper to achieve a public key digital watermarking thinking , but it is the help of public key cryptography algorithm based on public key digital watermarking , there is a certain distance . This will be the future research directions .

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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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