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: SeGrid: A Secure Grid Framework for Sensor Networks | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2006 Article ID 90652 Pages 1-11 DOI WCN 2006 90652 SeGrid A Secure Grid Framework for Sensor Networks Xiuzhen Cheng 1 Fang Liu 1 and Fengguang An2 1 Department of Computer Science The George Washington University Washington DC 20052 USA 2 Institute of Computing Technology Chinese Academy of Sciences Beijing 100080 China Received 10 October 2005 Accepted 22 December 2005 In this paper we propose SeGrid a secure framework for establishing grid keys in low duty cycle sensor networks for which establishing a common key for each pair of neighboring sensors is unnecessary since most sensors remain in sleep mode at any instant of time. SeGrid intends to compute a shared key for two grids that may be multihop away. This design explores the fact that for most applications closer grids have higher probability and desire for secure message exchange. SeGrid relies on the availability of a low-cost public cryptosystem. The query and update of the corresponding public shares are controlled by a novel management protocol such that the closer the two grids the shorter the distance to obtain each other s public share. We instantiate SeGrid based on Blom s key establishment to illustrate the computation of a grid key. Copyright 2006 Xiuzhen Cheng 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. 1. INTRODUCTION Security provisioning is a critical service for many sensor network applications 1-3 . However the severely constrained resources memory processor battery etc. within a sensor render many of the popular public key-based security primitives inapplicable 4 . Therefore much research effort 5-11 has been placed on how to establish a shared key between two sensors such that their communications can be secured .
