A Framework for Anonymizing GSM Calls over a Smartphone VoIP Network. - Ioannis Psaroudakis; Vasilios Katos; Pavlos S. Efraimidis (SEC, 2012)

The Sphinx enigma in critical VoIP infrastructures: Human or botnet? - Dimitris Gritzalis; Yannis Soupionis; Vasilios Katos; Ioannis Psaroudakis; Panajotis Katsaros; Anakreon Mentis (IISA, 2013)

A method for forensic artefact collection, analysis and incident response in environments running session initiation protocol and session description protocol. - Ioannis Psaroudakis; Vasilios Katos; Panagiotis Saragiotis; Lilian Mitrou (Int. J. Electron. Secur. Digit. Forensics, 2014)

Voice over IP Forensics - Ioannis Psaroudakis (2014)

A novel mechanism for anonymizing Global System for Mobile Communications calls using a resource-based Session Initiation Protocol community network. - Ioannis Psaroudakis; Vasilios Katos; Pavlos S. Efraimidis (Secur. Commun. Networks, 2015)