SSLVPN user identity verification method and system based on collaborative signature

The invention relates to a collaborative signature-based SSLVPN (Secure Socket Layer Virtual Private Network) user identity authentication method and system, and relates to the technical field of secure socket layer protocol server authentication. The system comprises a client, a collaborative signature server and an SSLVPN server, the client is in communication connection with the collaborative signature server and the SSLVPN server, and the collaborative signature server is in communication connection with the SSLVPN server; and the collaborative signature server is in communication connection with the SSLVPN server. In the process of user identity verification, the method does not depend on the identity verification factor of a traditional single digital certificate, combines a collaborative signature, an encryption protocol based on random number encryption and decryption and a redundancy verification form, emphasizes the combination of safety and efficiency, simplifies the flow of user identity verificat