An Expanded SIP Protocol and Analysis to its Security
Z Iang · Microcomputer Information · 2008
SIP has many such advantages as opening,flexibility and expendability,but it does not establish any encrypting standard for the media-flow part. This paper analyses several network attack means SIP is faced with and its own safety mechanism,and making use of the expandability of SIP,this paper puts forward a new method of achieving the symmetrical encryption of the network media current by means of key exchange,and makes an analysis to its security.