Multimedia Interactive Network Virtual Design Based on Digital Information Security and Blockchain Technology

Security has always been a critical challenge in the virtual design of multimedia interactive networks. This study explored the application of digital information security and blockchain technology within these systems. The SHA-256 algorithm and smart contracts were employed to implement blockchain encryption, and simulation experiments were conducted for scenarios such as Distributed Denial of Service attacks and data tampering. The experimental results showed that applying digital information security and blockchain technology enhanced system performance, with an anti-attack ability of 95.0%, a security score of 90.5, and a data source accuracy of 95.3%. Data traceability reached 90.4%, while the user experience and immersion scores were 90.2 and 96, respectively.