Research And Implementation Of SIP-based Security Video Surveillance System

In recent years,the widespread popularization of video surveillance applications has provided a guarantee for social public safety.At the same time,the video surveillance system is also facing information security challenges from various network levels,such as equipment security,communication security,storage security and other issues.This paper studies the security issues related to video surveillance systems at home and abroad in recent years,chooses SIP protocol to design a security video surveillance system,based on PKI/CA distributed digital certificate management platform,to protect and authenticate video data and user identities,to achieve credible data interaction and identity identification.Firstly,aiming at the security issues in the video surveillance system,this paper designs a security interaction scheme based on the national secret PKI,improves the original authentication method of the SIP protocol,and uses the certificate issued by a trusted third party,combined with the private key Signature and digest value verification realizes two-way identity authentication between users,front-end devices and SIP servers;a signaling integrity protection mechanism based on key value digests is designed,and the communication parties negotiate the video key encryption key,combined with The key and time stamp calculate the summary of the key value information to realize the integrity protection of the signaling.The paper further aims at the problems of single point of failure and difficulty in cross-domain authentication existing in traditional PKI,and designs a distributed national secret video digital certificate management platform based on the blockchain architecture,using blockchain decentralization,With the characteristics of transaction consistency and information transparency,a multi-CA certificate issuance mechanism is realized,and chain code design is used to realize the query,issuance and revocation of blockchain certificates.Based on the above research,this paper designs and implements a security video surveillance system,tests the functions of video surveillance and security certificate management,and verifies the effectiveness of the system.