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 Performance Analysis of Novel Randomly Shifted Certification Authority Authentication Protocol for MANETs | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2009 Article ID 243956 11 pages doi 2009 243956 Research Article Performance Analysis of Novel Randomly Shifted Certification Authority Authentication Protocol for MANETs G. A. Safdar and M. P. O Neill nee McLoone The Institute of Electronics Communications and Information Technology ECIT Queen s University of Belfast Northern Ireland Science Park Queen s Road Queen s Island Belfast BT3 9DT UK Correspondence should be addressed to G. A. Safdar Received 14 August 2008 Revised 19 March 2009 Accepted 3 June 2009 Recommended by Kameswara Namuduri The provision of security in mobile ad hoc networks is of paramount importance due to their wireless nature. However when conducting research into security protocols for ad hoc networks it is necessary to consider these in the context of the overall system. For example communicational delay associated with the underlying MAC layer needs to be taken into account. Nodes in mobile ad hoc networks must strictly obey the rules of the underlying MAC when transmitting security-related messages while still maintaining a certain quality of service. In this paper a novel authentication protocol RASCAAL is described and its performance is analysed by investigating both the communicational-related effects of the underlying IEEE MAC and the computational-related effects of the cryptographic algorithms employed. To the best of the authors knowledge RASCAAL is the first authentication protocol which proposes the concept of dynamically formed short-lived random clusters with no prior knowledge of the cluster head. The performance analysis demonstrates that the communication losses outweigh the computation losses with respect to energy and delay. MAC-related communicational effects account for 99 of the total delay and total energy consumption incurred by the RASCAAL protocol. The results also show that a .
