The widespread adoption of the consumer-centric mobile devices in which various sensors are equipped have enabled the adoption of mobile crowdsensing (MCS). In this thesis, a design of worker sharing framework for MCS platforms using blockchain technology is proposed to enable collaboration between MCS platforms. Collaborating MCS platforms use smart contract on the blockchain as a reference that collaboration happens between them. Furthermore, data sharing protocol which is related to the external worker personal data and the external worker sensed data are also proposed so that information exchange between MCS platforms is secured. A prototype is implemented to show the feasibility of the proposed protocol. In addition, security analysis is conducted to evaluate the security strength of the proposed protocol.

The widespread adoption of the consumer-centric mobile devices in which various sensors are equipped have enabled the adoption of mobile crowdsensing (MCS). In this thesis, a design of worker sharing framework for MCS platforms using blockchain technology is proposed to enable collaboration between MCS platforms. Collaborating MCS platforms use smart contract on the blockchain as a reference that collaboration happens between them. Furthermore, data sharing protocol which is related to the external worker personal data and the external worker sensed data are also proposed so that information exchange between MCS platforms is secured. A prototype is implemented to show the feasibility of the proposed protocol. In addition, security analysis is conducted to evaluate the security strength of the proposed protocol.

Abstract IV
Acknowledgment V
Contents VI
List of Figures VIII
List of Tables X
List of Pseudocode XI
Chapter 1 Introduction 1
Chapter 2 Literature Review 7
2.1 Mobile crowdsensing 7
2.2 Blockchain 12
2.1.1. Distributed Ledger 12
2.1.2. Consensus 14
2.1.3. Smart Contract 16
Chapter 3 Proposed System Design 17
3.1 Assumptions 17
3.2 Proposed System Architecture 18
3.3 Applicable Scenario 20
Chapter 4 Proposed Data Sharing Protocol 24
4.1 Personal Data Sharing Protocol for External Workers 25
4.2 External Worker Sensed Data Transfer Protocol 29
Chapter 5 Prototype Design & Implementation 32
5.1 Prototype Design 32
5.2 Prototype Implementation 36
Chapter 6 Security Analysis 45
6.1 Security against attack within the proposed protocol 45
6.2 Other security properties on the proposed framework 47
Chapter 7 Conclusion 49
References 51

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