@conference {
	title = {Modeling Key Agreement in Multi-Hop Ad Hoc Networks},
	author = {Crescenzo, Giovanni Di., Striki, Maria., Baras, John S.},
	year = {2006},
	month = {07/2006},
	abstract = {Securing multicast communications in ad hoc networks has become one of the most challenging research directions in the areas of wireless networking and security. This is especially true as ad hoc networks are emerging as the desired environment for an increasing number of civilian, commercial and military applications, also addressing an increasingly large number of users. In this paper we study a very basic security question for Ad Hoc Networks: Key Agreement against passive adversaries. Despite being a widely studied area in wired networks, the problem becomes significantly more challenging for ad hoc networks, and even more for sensor networks, due to lack of trusted entities, infrastructures, full connectivity, routing structures, and due to severe limitations on the resources and capabilities of network nodes. In this paper we perform a comprehensive investigation of Key Agreement over resource constrained ad hoc networks. First, we formally model the key agreement problem over multi-hop ad hop networks, and we directly extend known key agreement protocols for wired networks, and evaluate the efficiency of such approaches. We then go beyond natural extensions of such protocols, by proposing non-trivial extensions based on efficient topology-driven simulations of logical networks over an arbitrary physical network, in order to optimize the most significant metrics of interest for such networks: i.e. bandwidth, latency, processing cost. Indeed, the resulting protocols are significantly more efficient in some or all of the above metrics, as our analytical results indicate},
	address = {Vancouver, Canada},
	booktitle = {2006 International Wireless Communications and Mobile Computing Conference},
	pages = {pp. 39-44}
}
@conference {
	title = {A Robust Distributed TGDH-based Scheme for Secure Group Communications in MANET{\textquoteright}s},
	author = {Striki, Maria., Baras, John S., Manousakis, Kyriakos.},
	year = {2006},
	month = {06/2006},
	abstract = {Securing multicast communications in Mobile Ad Hoc Networks (MANET) is considered among the most challenging research directions in the areas of wireless networking and security. MANET is emerging as the desired environment for an increasing number of commercial and military applications, addressing also a growing number of users. Security, on the other hand, is now an indispensable requirement for these applications. However, the limitations of the dynamic, infrastructure-less nature of MANET impose major difficulties in establishing a secure framework suitable for such services. The design of efficient key management (KM) schemes for MANET is of paramount importance since the performance of the KM functions imposes an upper limit on the efficiency and scalability of the whole secure group communication system. In this work, we contribute towards this direction by extending TGDH to a novel distributed scheme: DS-TGDH. Our aim is to modify TGDH to: a) be feasible in the most general resource-constrained MANET where no nodes with special capabilities exist, b) produce considerably lower overhead for the network nodes involved, c) handle disruptions with low cost. We consider the underlying routing protocol in our design, and we apply a distributed TGDH version over a robust schedule, optimizing parameters of interest. We focus on the design and analysis of the {\textquotedblleft}stealthy{\textquotedblright} TGDH and compare it with the original. Through our analysis and results, we shed insight on the actual feasibility of these protocols for MANET and provide realistic and fair comparison results that more accurately advocate the pros and cons of each protocol over the environment of study.},
	address = {Istanbul, Turkey},
	booktitle = {ICC2006 - IEEE International Conference on Communications},
	pages = {pp. 2249-2255}
}
