Multiparty watermarking protocol based on blockchain

With the development of multimedia and the Internet, the problem of multimedia copyright infringement has become more and more serious. The combination of digital watermark and security protocol plays a vital role in copyright protection of multimedia in the up-to-date open network environment. Most of the existing schemes involve trusted third parties and arbitration institutions, but they are not usually credible. This paper proposes a new watermarking protocol with multiple parties based on the blockchain. The protocol involves the buyer, the seller, the cloud platform and the blockchain. In the protocol, the certificateless secret key negotiation between the buyer and the seller is utilized to avoid Man-in-the-middle Attack, and the cloud platform is used to perform homomorphic calculations and watermark embedding operation. By using the characteristics of the blockchain such as non-tamperability and traceability, the security and fairness of the protocol can be ensured.

Automated summary

With the development of multimedia and the Internet, the issue of multimedia copyright infringement has become increasingly serious. The combination of digital watermark and security protocol is crucial for protecting multimedia copyright in the current open network environment. Existing schemes involving trusted third parties and arbitration institutions are often not credible. This paper proposes a new blockchain-based watermarking protocol with multiple parties, including the buyer, seller, cloud platform, and blockchain. The protocol utilizes certificateless secret key negotiation to prevent Man-in-the-middle Attack, and the cloud platform performs homomorphic calculations and watermark embedding. The protocol ensures security and fairness by leveraging the characteristics of the blockchain, such as non-tamperability and traceability.