Verification of the Denning-Sacco Protocol Based on APTC

With the rapid development of information technology, network communication security has become one of the core issues in ensuring information security. As a typical representative in the field of key exchange, the security analysis and verification of the Denning - Sacco protocol have always been a hot topic in cryptography. The protocol was initially designed to address security issues in key exchange, but it has exposed some security vulnerabilities in practical applications, such as being susceptible to replay attacks and man - in - the - middle attacks. Therefore, in response to these known vulnerabilities, this study will conduct a detailed modeling and analysis of the protocol using true concurrent process algebra to verify its security and ensure that the protocol can resist various types of attacks.