With the increase in the number of Internet of Things (IoT) applications, the reliance on
robust networking, reliable communications, and efficient and secure data storage is …

While blockchain systems are quickly gaining popularity, front-running remains a major
obstacle to fair exchange. In this paper, we show how to apply identity-based encryption …

Blockchain sharding has been increasingly used to improve blockchain systems'
performance, in which a blockchain is split into multiple smaller, disjoint shards. In practice …

This paper presents iBatch, a middleware system running on top of an operational Ethereum
network to enable secure batching of smart-contract invocations against an untrusted relay …

Users must pay a fee depending on resource consumption when using smart contracts on
the Ethereum blockchain. As even the most basic operations cost several dollars under …

The idea of hash time‐lock contracts (HTLCs) has been around from 2013. Nowadays these
contracts power the majority of atomic swaps making decentralized exchange of tokens …

Concurrent execution of smart contracts is a promising approach to boost their performance
in current blockchain systems. However, prior work on concurrent execution only considered …

Hybrid blockchain architectures combine centralized applications, like enterprise systems,
with (public) blockchain to implement additional functionality, such as tamper-proof record …

Cash flow is crucial to the financial wellbeing of construction and engineering firms.
Construction progress payments, constituting a big portion of cash flow on projects, are …

This thesis aims to examine the security of a blockchain's communication network. A
blockchain relies on a communication network to deliver transactions. Understanding and …