Title :
On the Privacy of Encrypted Skype Communications
Author :
Dupasquier, Benoît ; Burschka, Stefan ; McLaughlin, Kieran ; Sezer, Sakir
Author_Institution :
Centre for Secure Inf. Technol. (CSIT), Queen´´s Univ. of Belfast, Belfast, UK
Abstract :
The privacy of voice over IP (VoIP) systems is achieved by compressing and encrypting the sampled data. This paper investigates in detail the leakage of information from Skype, a widely used VoIP application. In this research, it has been demonstrated by using the dynamic time warping (DTW) algorithm, that sentences can be identified with an accuracy of 60%. The results can be further improved by choosing specific training data. An approach involving the Kalman filter is proposed to extract the kernel of all training signals.
Keywords :
Internet telephony; Kalman filters; cryptography; data compression; data privacy; DTW algorithm; Kalman filter; VoIP system privacy; dynamic time warping; encrypted Skype communication; voice over IP; Accuracy; Codecs; Cryptography; Data models; Heuristic algorithms; Kalman filters; Speech;
Conference_Titel :
Global Telecommunications Conference (GLOBECOM 2010), 2010 IEEE
Conference_Location :
Miami, FL
Print_ISBN :
978-1-4244-5636-9
Electronic_ISBN :
1930-529X
DOI :
10.1109/GLOCOM.2010.5684214
