Survey and Benchmark of Stream Ciphers for Wireless Sensor Networks

Introduction Stream ciphers Methodo. Results CnSurvey and Benchmark of Stream Ciphers forWireless Sensor Networks1 2 2N. Fournel , M. Minier , S. Ubeda1LIP, ENS LyonLyon - FranceNicolas.Fournel@ens-lyon.fr2CITI - INSA de Lyon - ARES INRIA ProjectLyon - FranceFirstName.Name@insa-lyon.frMay 10, 2007INSA de Lyon N. Fournel, M. Minier, S. Ubeda WISTP 2007Introduction Stream ciphers Methodo. Results CnIntroductionThe aim of this paper is to present some benchmarks ofstream ciphers on a dedicated sensor (as previously done forblock in [Law et al. 2006])Why use stream ciphers in WSNs ?they could reach important ows for limited costsThey do not propagate errors in communication channels (onetime pad)Usually used in wireless communications (WEP, GSM,...)useful for pairwise secure associations in WSNsINSA de Lyon N. Fournel, M. Minier, S. Ubeda WISTP 2007Introduction Stream ciphers Methodo. Results Cn Overview Stream Ciphers Classical eStreamGeneral overview of stream ciphers (1/2)\one time pad" useThe random sequence s is generated using a stream cipheri(or pseudo-random generator)Initialized with a common shared key K and an IV thatmust be di erent for each messageINSA de Lyon N. Fournel, M. Minier, S. Ubeda WISTP 2007Introduction Stream ciphers Methodo. Results Cn Overview Stream Ciphers Classical eStreamGeneral overview of stream ciphers (2/2) A stream cipher is composed of three phases1 An initial state of length L (at least2 times the ...