Protocols for Secure Communication in Wireless Sensor Networks

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178 Chapter 6. Integrity-Preserving Communications Time overhead (ms) Time overhead (ms) 2000 1800 1600 1400 1200 1000 800 600 400 200 4000 3500 3000 2500 2000 1500 1000 500 0 0 2 4 6 8 10 12 14 16 18 20 Path length Canvas, secret suffix Canvas, HMAC EC Figure 6.7: Time overhead for a 64 byte message Canvas, secret suffix Canvas, HMAC EC 0 0 2 4 6 8 10 12 14 16 Path length Figure 6.8: Time overhead for a 512 byte message
6.4. Security Evaluation 179 Bandwidth overhead (byte) 3500 3000 2500 2000 1500 1000 500 0 0 2 4 6 8 10 12 14 16 18 20 Path length Figure 6.9: Bandwidth overhead Canvas, |mac|=7 Canvas, |mac|=20 EC MACs are truncated, the advantage of Canvas is retained, however. 6.4 Security Evaluation Before we actually present these results, we give a brief overview of the method that has been used to retrieve the numerical values for these comparisons. 6.4.1 Analytical Assessment of Resilience We introduce here the function B(x), which takes the number x of compromised nodes as input and returns an approximation of the number of compromised paths. It is obvious that this approximation can be very rough only. The number of compromised nodes says nothing about the topological position of the nodes within the network. Each position differs in how many paths it will help to compromise. As a network model, we will use a random geometric graph. We loosely assume it has rectangular shape, and we ignore border effects. The suffix E for B() describes an approximation if end-to-end authentication is being used. In this case, only those paths are considered compromised that have at least one compromised end node. For each compromised node, there are on average 2(N − 1) paths to other nodes that are considered compromised
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Diss. ETH Nr. 18174 Protocols for S
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ii often ad hoc and transient natur
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iv Dieses Ziel kann durch kryptogra
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Contents 1 Introduction 1 1.1 Backg
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Contents ix 3.3.1 Basic Assumptions
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Contents xi 6.3 Performance Evaluat
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Chapter 1 Introduction 1.1 Backgrou
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1.3. Contributions 3 on the other h
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1.4. Thesis Outline 5 • Mario Str
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Chapter 2 Wireless Sensor Networks
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2.1. Applications of Wireless Senso
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2.1. Applications of Wireless Senso
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2.2. Sensor Node Characteristics 13
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2.3. Related Network Types 21 zero,
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2.3. Related Network Types 23 • P
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2.3. Related Network Types 25 PAN,
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2.4. Related Device Types 27 in con
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2.4. Related Device Types 29 ports
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2.5. Sensor Network Models 31 both
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2.5. Sensor Network Models 33 are a
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2.6. Simulation of Sensor Networks
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2.7. Security Requirements 41 terac
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2.7. Security Requirements 43 netwo
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2.7. Security Requirements 45 acces
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2.7. Security Requirements 47 2.7.6
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2.7. Security Requirements 49 of te
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2.8. Cryptography for Sensor Networ
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2.9. Existing Approaches to Wireles
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Chapter 3 A Security Model for Wire
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3.1. Attack Paths 67 field (cf. [17
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3.1. Attack Paths 69 modules [63].
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3.1. Attack Paths 71 closed environ
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3.2. Attack Objectives 73 • Timel
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3.2. Attack Objectives 75 Critical
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3.2. Attack Objectives 77 Actors A
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3.3. Adversary Characteristics 79 a
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3.3. Adversary Characteristics 81 c
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3.3. Adversary Characteristics 83 p
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3.4. The Cost of End-to-End Securit
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3.4. The Cost of End-to-End Securit
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3.5. Approximating End-to-End Secur
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3.7. Summary 95 Location-constraine
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Chapter 4 Key Establishment Shared
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4.2. Random Key Pre-Distribution 99
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4.3. Key Agreement Based on Hash Ch
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4.4. Multiple Hash Chains for Key A
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4.4. Multiple Hash Chains for Key A
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4.5. Strengthening Random Key Pre-D
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4.6. Related Work 123 pc = 0.33 Du-
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4.6. Related Work 125 Probability o
Page 141 and 142: 4.7. Summary 127 The security of th
Page 143 and 144: Chapter 5 Multipath Communication T
Page 145 and 146: 5.1. Principles of Multipath Commun
Page 147 and 148: 5.2. Routing on Spanning Trees 133
Page 155 and 156: 5.3. Properties of Tree Paths 141 b
Page 157 and 158: 5.3. Properties of Tree Paths 143 a
Page 159 and 160: 5.3. Properties of Tree Paths 145 n
Page 161 and 162: 5.3. Properties of Tree Paths 147 F
Page 163 and 164: 5.3. Properties of Tree Paths 149 D
Page 165 and 166: 5.4. Security Evaluation 151 compro
Page 167 and 168: 5.5. Related Work 153 width usage a
Page 169 and 170: 5.5. Related Work 155 separation. F
Page 171 and 172: Chapter 6 Integrity-Preserving Comm
Page 173 and 174: 6.1. Authentication and Integrity P
Page 175 and 176: 6.2. Basic Interleaved Authenticati
Page 189 and 190: 6.3. Performance Evaluation 175 A B
Page 191: 6.3. Performance Evaluation 177 We
Page 195 and 196: 6.4. Security Evaluation 181 a sens
Page 197 and 198: 6.4. Security Evaluation 183 Number
Page 199 and 200: 6.4. Security Evaluation 185 We ass
Page 201 and 202: 6.4. Security Evaluation 187 Paths
Page 203 and 204: 6.4. Security Evaluation 189 ity of
Page 205 and 206: 6.4. Security Evaluation 191 of the
Page 207 and 208: 6.4. Security Evaluation 193 The se
Page 209 and 210: 6.5. Extended Interleaved Authentic
Page 221 and 222: 6.6. Comparing Interleaved and Mult
Page 223 and 224: 6.7. Applications 209 Psi 1 0.8 0.6
Page 225 and 226: 6.7. Applications 211 codes are att
Page 227 and 228: 6.7. Applications 213 domain. The r
Page 229 and 230: 6.9. Summary 215 simulations and by
Page 231 and 232: Chapter 7 Conclusion This work prop
Page 233 and 234: 7.1. Secure Communication in Wirele
Page 235 and 236: 7.2. Future Work 221 7.1.4 Shortcut
Page 237 and 238: Bibliography [1] Specification of t
Page 239 and 240: Bibliography 225 1st European Works
Page 241 and 242: Bibliography 227 [41] Rohan Chitrad
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Bibliography 229 [64] L. Eschenauer
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Bibliography 231 [85] Yahoo! Inc. D
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Bibliography 233 [105] Kristof Van
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Bibliography 235 [126] Anne Marie M
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Bibliography 237 [150] Sylvia Ratna
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Bibliography 239 [172] Thanos Stath
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Bibliography 241 [192] Eric W. Weis
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Curriculum Vitae Harald Vogt Person
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