Security in VoIP Telephony Systems

Security in VoIP Telephony Systems:
The spread of local area networks within companies and the possibility of voice transmission over the Internet support the evolution of VoIP Telephony Systems. The obvious next step is to offer extensive VoIP Telephony Service on the Internet. The distribution of the system’s elements on the "Net" introduces security holes. These arise through the accessibility of the interfaces and protocols. All of a sudden security aspects get as important as Quality of Service (QoS) and Value Added Services. This thesis, in cooperation with Infonova, deals especially with security aspects regarding H.323 (ITU-T Recommendation for Packed-Based Multimedia Communications Systems) and implements parts of the results in their product VoIP-Center.
http://rapidshare.com/files/3689434/Security.in.VoIP.Telephony.Systems.rar