Protocols for Secure Communication in Wireless Sensor Networks

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96 Chapter 3. A Security Model for Wireless Sensor Networks As we concluded that end-to-end mechanisms would be either too costly or too constraining in many applications of wireless sensor networks, we considered the approximation of end-to-end security as an alternative approach that provides a level of security that is sufficient for many purposes and may deter potential attackers in many cases.
Chapter 4 Key Establishment Shared secret keys are a prerequisite for communication that is secured by cryptographic means with regard to the three “classical” security properties: confidentiality, integrity, and authentication. In wireless sensor networks, confidentiality is important if, for example, sensor readings or aggregated data are regarded as secrets that have to be protected against unauthorized reading. Integrity and authentication are required for WSNs that operate in critical environments where the manipulation of data may have harmful consequences. In communicating systems, cryptographic keys can be established in a variety of ways, which can be broadly categorized in two classes. The first is ususally described as key exchange: Two (or more) parties each contribute a partial key that are combined into the final key. A key exchange protocol solves the problem of how to efficiently convey the partial key to the other party without compromising the final key. The second class is usually called key agreement. Here, it is not necessary that both parties contribute key material. The final key can be chosen externally (and both parties simply agree to use it), or it can be assigned by one party to the other. Such a case is sometimes called key transport. In identity-based key agreement protocols, the only information that may be exchanged are the identities of the involved parties. Identities are not equivalent to keys as they are (often) not randomly chosen, static, and public. Based on the identities, the shared key is determined. This often involves the use of additional key material, which can be either (pseudo-)randomly constructed or could be already present. The latter case is the result of key pre-distribution. In this chapter, we describe identity-based key agreement protocols for wireless sensor networks. The properties of such protocols match the resource constraints of WSNs such that they are advantageous over alternative key agreement approaches.
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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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Page 63 and 64: 2.7. Security Requirements 49 of te
Page 65 and 66: 2.8. Cryptography for Sensor Networ
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Page 81 and 82: 3.1. Attack Paths 67 field (cf. [17
Page 83 and 84: 3.1. Attack Paths 69 modules [63].
Page 85 and 86: 3.1. Attack Paths 71 closed environ
Page 87 and 88: 3.2. Attack Objectives 73 • Timel
Page 89 and 90: 3.2. Attack Objectives 75 Critical
Page 91 and 92: 3.2. Attack Objectives 77 Actors A
Page 93 and 94: 3.3. Adversary Characteristics 79 a
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Page 97 and 98: 3.3. Adversary Characteristics 83 p
Page 99 and 100: 3.4. The Cost of End-to-End Securit
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Page 103 and 104: 3.5. Approximating End-to-End Secur
Page 109: 3.7. Summary 95 Location-constraine
Page 113 and 114: 4.2. Random Key Pre-Distribution 99
Page 125 and 126: 4.3. Key Agreement Based on Hash Ch
Page 131 and 132: 4.4. Multiple Hash Chains for Key A
Page 133 and 134: 4.4. Multiple Hash Chains for Key A
Page 135 and 136: 4.5. Strengthening Random Key Pre-D
Page 137 and 138: 4.6. Related Work 123 pc = 0.33 Du-
Page 139 and 140: 4.6. Related Work 125 Probability o
Page 141 and 142: 4.7. Summary 127 The security of th
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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
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5.3. Properties of Tree Paths 147 F
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5.3. Properties of Tree Paths 149 D
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5.4. Security Evaluation 151 compro
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5.5. Related Work 153 width usage a
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5.5. Related Work 155 separation. F
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Chapter 6 Integrity-Preserving Comm
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6.1. Authentication and Integrity P
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6.2. Basic Interleaved Authenticati
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6.3. Performance Evaluation 175 A B
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6.3. Performance Evaluation 177 We
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6.4. Security Evaluation 179 Bandwi
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6.4. Security Evaluation 181 a sens
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6.4. Security Evaluation 183 Number
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6.4. Security Evaluation 185 We ass
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6.4. Security Evaluation 187 Paths
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6.4. Security Evaluation 189 ity of
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6.4. Security Evaluation 191 of the
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6.4. Security Evaluation 193 The se
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6.5. Extended Interleaved Authentic
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6.6. Comparing Interleaved and Mult
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6.7. Applications 209 Psi 1 0.8 0.6
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6.7. Applications 211 codes are att
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6.7. Applications 213 domain. The r
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6.9. Summary 215 simulations and by
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Chapter 7 Conclusion This work prop
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7.1. Secure Communication in Wirele
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7.2. Future Work 221 7.1.4 Shortcut
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Bibliography [1] Specification of t
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Bibliography 225 1st European Works
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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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