Belief and Survey Propagation for SAT信仰和调查传播的SAT.ppt
Security of works Tanya Roosta TRUST Seminar UC Berkeley, November 9, 2006 1 Overview Taxonomy of attacks on works Convergence analysis of Reweighted-Tree sum-product algorithms Time synchronization security Reputation system for tracking Game theory 2 Overview Taxonomy of attacks on works Convergence analysis of Reweighted-Tree sum-product algorithms Time synchronization security Reputation system for tracking Game theory 3 Background on work works consist of a large number of motes anizing, highly integrated with changing environment work Highly Constrained resources processing, storage, bandwidth, power Facilitate large scale deployment Health care Surveillance Critical infrastructure 4 Motivation Sometimes deployed in hostile environment, and have random topology Vision is to integrate sensors into critical infrastructure, such as wireless Supervisory Control And Data Acquisition systems (SCADA) Traditional security techniques can not be applied because … 5 Challenges Unique to works Random Topology Secure aggregation Context privacy [PMRSSW06] Scalability of trust/key management schemes Power putation efficiency [PMRBSSW06] “Sameer Pai, Marci Meingast, Tanya Roosta, Sergio Bermudez, Shankar Sastry, Stephen Wicker. “Privacy in works: A Focus On Transactional Information”. Under submission to IEEE Security and Privacy Magazine 6 Security Attacks on works Need to have prehensive taxonomy of security and confidentiality attacks on works to describe [RSS06]: Attacker’s goal Trust model Security requirements Various types of attacks [RSS06] Tanya Roosta, Shiuhpyng Shieh, Shankar Sastry. "Taxonomy of Security Attacks on works". IEEE International Conference on System Integration and Reliability Improvements 2006 7 Attacker’s Goal Eavesdropping (outsider attacker) Disruption of applications (insider attacker) Subverting a subset of sensor nodes (insider attacker) 8 There is usually a central base station that gathers all the data reported
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