J4 ›› 2015, Vol. 42 ›› Issue (4): 176-181.doi: 10.3969/j.issn.1001-2400.2015.04.029

• Original Articles • Previous Articles     Next Articles

Secure zero knowledge watermark detection scheme  based on the text robust feature

FU Zhangjie1,2;SHU Jiangang1,2;SUN Xingming1,2;ZHOU Lu1,2   

  1. (1. College of Computer and Software, Nanjing Univ. of Information Science and Technology, Nanjing  210044, China;
    2. Jiangsu Center of Network Monitoring Engineering, Nanjing Univ. of Information Science and Technology, Nanjing  210044, China)
  • Received:2014-03-25 Online:2015-08-20 Published:2015-10-12
  • Contact: FU Zhangjie E-mail:wwwfzj@126.com

Abstract:

The security of a digital watermarking scheme must not depend on the watermarking algorithm itself or the embedding key. To improve the security of the digital watermarking scheme, the zero knowledge watermark detection (ZKWD) scheme based on asymmetric encryption is proposed for a plain text. The scheme consists of four components. Firstly, text features are extracted using the robust feature extraction method, and watermarking information is generated using the logistic chaotic map function. Then watermarking information is embedded into the original text medium using the common text watermarking method. When a copyright dispute occurs, the verifier and prover could verify the embedded watermark information according to the proposed ZKWD protocol based on asymmetric encryption. Using the method of zero knowledge proof, the watermark information could be detected without exposing the secrets related to the watermark, which makes the attacker unable to modify, forge or remove the watermark using the information obtained in the process of watermarking detection. The scheme does not leak any information to the verifier, and improves the security of watermarking detection.

Key words: digital watermarking, zero knowledge, copyright protection, asymmetric encryption

CLC Number: 

  • TP30912