Applied cryptography (2nd ed.): protocols, algorithms, and source code in C
Applied cryptography (2nd ed.): protocols, algorithms, and source code in C
CRYPTO '94 Proceedings of the 14th Annual International Cryptology Conference on Advances in Cryptology
Towards the Equivalence of Breaking the Diffie-Hellman Protocol and Computing Discrete Algorithms
CRYPTO '94 Proceedings of the 14th Annual International Cryptology Conference on Advances in Cryptology
New directions in cryptography
IEEE Transactions on Information Theory
Secure spread spectrum watermarking for multimedia
IEEE Transactions on Image Processing
A buyer-seller watermarking protocol
IEEE Transactions on Image Processing
An efficient and anonymous buyer-seller watermarking protocol
IEEE Transactions on Image Processing
Buyer-seller watermarking protocols with off-line trusted third parties
International Journal of Ad Hoc and Ubiquitous Computing
An ID-based digital watermarking protocol for copyright protection
Computers and Electrical Engineering
A legally-admissible copyrights ownership identification protocol for digital works
Proceedings of the 4th International Conference on Internet Multimedia Computing and Service
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Gradually, copyright-protection protocols have attracted much attention in that they provide effective copyright protection mechanisms. Asymmetric copyright-protection protocols allow the buyer to know and possess the protected content yet the seller has no idea about it. Subsequently, if an illegal copy is found, the seller can identify the buyer by cooperating with a trusted third party. Most copyright-protection protocols adopt public-key cryptosystems to achieve asymmetry. However, both encryption and decryption of multimedia based on public-key cryptosystems have the drawbacks of requiring high computational complexity and suffering from the burden of maintaining Public Key Infrastructure. Hence, enhancement and further development of these protocols are both necessary and central to the development of future e-commerce. In this paper, a lightweight copyright-protection protocol, benefiting from combining secret-key cryptosystems and a tamper-resistant device, is proposed to provide not only asymmetry of the protocol but also transaction anonymity of the buyer. Since the tamper-resistant device, generally speaking, provides a higher security level and is more and more commonly used, the schemes based on a tamper-resistant device are more practical than before. Moreover, the proposed protocol is computationally efficient and the key management is simple.