Skype对等网络电话协议分析
An Analysis of the Skype Peer-to-Peer Internet Telephony Protocol
摘要：
Skype是由KaZaa于2003年开发的点对点VoIP客户端。Skype声称，它可以几乎无缝地跨越NAT和防火墙，并有更好的语音质量比MSN和雅虎IM应用程序。它对端到端的呼叫进行加密，并以分散的方式存储用户信息。Skype还支持即时消息和会议。该报告分析了三种不同网络设置下的关键Skype功能，如登录，NAT和防火墙穿越，呼叫建立，媒体传输，编解码器和会议。通过仔细研究Skype网络流量进行分析。
英文摘要：
Skype is a peer-to-peer VoIP client developed by KaZaa in 2003. Skype claims that it can work almost seamlessly across NATs and firewalls and has better voice quality than the MSN and Yahoo IM applications. It encrypts calls end-to-end, and stores user information in a decentralized fashion. Skype also supports instant messaging and conferencing. This report analyzes key Skype functions such as login, NAT and firewall traversal, call establishment, media transfer, codecs, and conferencing under three different network setups. Analysis is performed by careful study of Skype network traffic.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
