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F. Fankhauser, M. Ronniger, C. Schanes, T. Grechenig:
"Security test environment for voip research";
International Journal for Information Security Research, 1 (2011), 1; S. 53 - 60.

Voice over IP (VoIP) is in wide use today, replacing
phone lines in many scenarios. However, often, security
isn´t considered well enough, even though many security
attacks are already known. More research on VoIP security
is needed to enhance the level of security of VoIP systems
and to show the implications of failing to take appropriate
security measures. This paper presents a short introduc-
tion in testing VoIP components, proposes an architecture
and implementation of a robust, flexible and efficient VoIP
test environment for security related tests. Experiences us-
ing the implemented environment for different VoIP security
tests are shown to demonstrate the suitability of the pro-
posed test environment for research and teaching purposes