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On the Cryptographic Features of a VoIP Service

School of Pure & Applied Sciences, Open University of Cyprus, Latsia 2220, Cyprus
Author to whom correspondence should be addressed.
Cryptography 2018, 2(1), 3;
Received: 27 November 2017 / Revised: 8 January 2018 / Accepted: 18 January 2018 / Published: 19 January 2018
Security issues of typical Voice over Internet Protocol (VoIP) applications are studied in this paper; in particular, the open source Linphone application is being used as a case study. An experimental analysis indicates that protecting signalling data with the TLS protocol, which unfortunately is not always the default option, is needed to alleviate several security concerns. Moreover, towards improving security, it is shown that a VoIP application may operate over a virtual private network without significantly degrading the overall performance. The conclusions of this study provide useful insights to the usage of any VoIP application. View Full-Text
Keywords: Linphone; SIP; TLS; VoIP; ZRTP Linphone; SIP; TLS; VoIP; ZRTP
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Alvanos, D.; Limniotis, K.; Stavrou, S. On the Cryptographic Features of a VoIP Service. Cryptography 2018, 2, 3.

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