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Research on Authentication Algorithm Combining Digital Signature and Digital Watermarking

Author: ZhuangZuoYu
Tutor: LinKeZheng
School: Harbin University of Science and Technology
Course: Computer Software and Theory
Keywords: Digital watermarking Digital signature Discrete cosine transform Adaptive Watermarking Since the embedded watermark
CLC: TP309.7
Type: Master's thesis
Year: 2009
Downloads: 120
Quote: 1
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Abstract


Digital watermarking technology and the digital signature technology is the information of the two major branches of hiding the identity of the copyright protection information and authentication information embedded in the image , audio, video or software in a variety of digital products to meet the transmission and differentiate illegal copy protection the role of intellectual property rights . Digital watermarking and digital signature technology as the current hot field of multimedia information security technology, has received international academic community and the business community 's attention. This paper studies the background at home and abroad , that the digital watermarking and digital signature technology for research and the importance of industrial production , and the digital watermarking and digital signature technology research status and development trends are analyzed and summarized ; Then for semi-fragile watermarking and digital signature technology has been studied thoroughly and systematically . In this paper, based on DCT transform domain adaptive watermarking algorithm DCT-based features , combined with the smallest difference can be felt watermark has good invisibility and robustness , and has a semi-fragile ; Then study DCT-based transform self-embedding watermarking algorithm can not only locate tampering and can be approximated restore changes to the content , and enhance the characteristics of the watermark against attacks ; Finally, based on the above self-embedding watermarking algorithm to study the combination of semi-fragile watermarking and digital signature authentication algorithm , a self- embedding watermarking method using two-factor authentication mechanism, making the user's identity and content have been certified , thus ensuring the credibility of the process of the session , to prevent counterfeiting and tampering of information , ensure the high security certification process . Experimental results and analysis show that the proposed algorithm can improve the certification process safety certification , the certification system research provides a new way of thinking.

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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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