Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Secure Geographic Routing in Ad Hoc and Wireless Sensor Networks | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2010 Article ID 975607 12 pages doi 2010 975607 Research Article Secure Geographic Routing in Ad Hoc and Wireless Sensor Networks Mariano Garcia-Otero 1 Theodore Zahariadis 2 Federico Alvarez 1 Helen C. Leligou 2 Adrian Poblacion-Hernandez 1 Panagiotis Karkazis 2 and Francisco J. Casajus-Quiros1 1 Escuela Tecnica Superior de Ingenieros de Telecomunicación Universidad Politecnica de Madrid Avenida Complutense 30 28040 Madrid Spain 2 Technological Educational Institute ofChalkida Psahna Evias 34400 Chalkida Greece Correspondence should be addressed to Federico Alvarez fag@ Received 21 February 2010 Accepted 27 July 2010 Academic Editor Roberto Verdone Copyright 2010 Mariano Garcia-Otero et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Security in sensor networks is one of the most relevant research topics in resource constrained wireless devices and networks. Several attacks can be suffered in ad hoc and wireless sensor networks WSN which are highly susceptible to attacks due to the limited resources of the nodes. In this paper we propose innovative and lightweight localization techniques that allow for intrusion identification and isolation schemes and provide accurate location information. This information is used by our routing protocol which additionally incorporates a distributed trust model to prevent several routing attacks to the network. We finally evaluate our algorithms for accurate localization and for secure routing which have been implemented and tested in real ad hoc and wireless sensor networks. 1. Introduction Security in sensor networks is one of the most relevant research topics in resource-constrained wireless devices and networks. Many security issues arise from .
