证实问题 meaning in English

validation problem

The article first analyses the major vulnerabilities of sip : plain text transmission of sip messages and the lack of effective mechanisms for identification , then do research on the security threats caused by the vulnerabilities of sip , including registration hijacking , impersonating a server , tampering with message bodies , tearing down sessions and denial of service . after setting up a sip communication platform in the laboratory environment , the article confirms the existence of security risks by using simulation attacking experiments
本文首先分析sip协议主要的脆弱性: sip消息明文传送和缺乏有力的身份鉴定机制,以及由于这些脆弱性而引发的包括注册劫持、服务器伪装、消息篡改、拆卸会话和拒绝服务等的安全威胁,并通过在实验室环境下搭建的sip通信平台,进行模拟攻击实验来证实问题的存在性。