发明名称 |
SECURITY SYSTEM AND SECURING METHOD OF CALL SIGNALING MESSAGES FOR SESSION INITIATION PROTOCOL BASED VOICE OVER THE INTERNET PROTOCOL SERVICE |
摘要 |
A security system of a call signaling message for an SIP(Session Initiation Protocol)-based VoIP(Voice over Internet Protocol) service and a method thereof are provided to block messages which are not suitable for message grammar or include blocking information registered in a blocking list or are not proper for message session states, thereby preventing an attack on a call signaling message. A message suitability verification module(10) receives call signaling messages transmitted between a terminal(1) and a server(2), blocks call signaling messages which do not comply with preset types, and delivers not-blocked call signaling messages. A filtering module(20) receives the call signaling messages, blocks call signaling messages including blocking information registered in a prestored blocking list, and delivers not-blocked call signaling messages. A message state verification module(30) receives the call signaling messages, blocks call signaling messages which do not correspond to session states, and transmits not-blocked messages to the terminal or the server.
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申请公布号 |
KR100852145(B1) |
申请公布日期 |
2008.08.13 |
申请号 |
KR20070119812 |
申请日期 |
2007.11.22 |
申请人 |
KOREA INFORMATION SECURITY AGENCY |
发明人 |
WON, YONG GEUN;IM, CHAE TAE;LEE, TAI JIN;WON, YOO JAE |
分类号 |
H04L12/66;H04L9/00;H04L12/22 |
主分类号 |
H04L12/66 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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