The market size of Internet of things (IoT) has grown rapidly in recent years. As a result, plenty of promising IoT applications have attracted lots of interest from both industry and academic. Unfortunately, Current IoT devices are suffer from the privacy and security issues. Thus, blockchain has been used to tackle the challenge. However, current blockchain design cannot meet the requirement of IoT.

In this thesis, we focus on the blockchain design for IoT considering following aspects:

Performance: We propose a reputation-based sharding blockchain to improve the performance of the blockchain for IoT.

Privacy: We propose a new privacy-preserving enhancement scheme for reputation-based blockchain to defend against slowly adaptive attacker.

Application: We propose a new layer-...[ Read more ]

The market size of Internet of things (IoT) has grown rapidly in recent years. As a result, plenty of promising IoT applications have attracted lots of interest from both industry and academic. Unfortunately, Current IoT devices are suffer from the privacy and security issues. Thus, blockchain has been used to tackle the challenge. However, current blockchain design cannot meet the requirement of IoT.

In this thesis, we focus on the blockchain design for IoT considering following aspects:

Performance: We propose a reputation-based sharding blockchain to improve the performance of the blockchain for IoT.

Privacy: We propose a new privacy-preserving enhancement scheme for reputation-based blockchain to defend against slowly adaptive attacker.

Application: We propose a new layer-2 design for supply chain that can reduce the collateral requirement.

Authenticity: We propose an adversarial attack on the data integrity and two authentication systems to protect the data authenticity before recoding them on the blockchain.