@conference {60,
	title = {Quantifying presence using calling patterns},
	booktitle = {Communication Systems Software and Middleware and Workshops, 2008. COMSWARE 2008. 3rd International Conference on},
	year = {2008},
	month = {Jan},
	abstract = {<p>Presence technology is going to be an integral part of the next generation of communication technology. It can eliminate telephone tag between two parties (caller and callee), which will increase productivity of the parties and reduce unnecessary bandwidth usage of unwanted calls. In this paper, we propose a Willingness Estimator that computes willingness level of a callee for receiving calls from a specified caller. By knowing the willingness value of the callee the caller can decide on proceeding with the call or not. The proposed Willingness Estimator is tested with real mobile user data, and these results are highly accurate. We measure willingness based on calling patterns (arrival time, location, day) of a caller to a callee and this could serve as one of the future presence based services. The results can be used in telecommunication networks such as PSTN, Cellular networks, and Voice over IP networks.</p>
},
	keywords = {cellular networks, Communications technology, Computer science, Computer security, Intrusion detection, Laboratories, Mobile handsets, mobile user data, Network servers, next generation communication, Next generation networking, presence technology, Productivity, PSTN, telecommunication networks, telephony, user calling pattern, voice over IP networks, willingness estimator},
	doi = {10.1109/COMSWA.2008.4554403},
	author = {Husna, Husain and Phithakkitnukoon, Santi and Baatarjav, Enkh-Amgalan and Ram Dantu}
}
@article {43,
	title = {VoIP Security: Attacks and Solutions},
	journal = {Information Security Journal: A Global Perspective},
	volume = {17},
	year = {2008},
	pages = {114{\textendash}123},
	abstract = {<p>Voice over IP (VoIP) technology is being extensively and rapidly deployed. Flexibility and cost efficiency are the key factors luring enterprises to transition to VoIP. Some security problems may surface with the widespread deployment of VoIP. This article presents an overview of VoIP systems and its security issues. First, we briefly describe basic VoIP architecture and its fundamental differences compared to PSTN. Next, basic VoIP protocols used for signaling and media transport, as well as defense mechanisms are described. Finally, current and potential VoIP attacks along with the approaches that have been adopted to counter the attacks are discussed.</p>
},
	keywords = {attack, defense mechanism, PSTN, Security, VoIP},
	issn = {1939-3555},
	doi = {10.1080/19393550802308618},
	url = {http://dx.doi.org/10.1080/19393550802308618},
	author = {Phithakkitnukoon, Santi and Ram Dantu and Baatarjav, Enkh-Amgalan}
}
