Consensus algorithms are applied in the context of distributed computer systems to improve
their fault tolerance. The explosive development of distributed ledger technology following …

Byzantine fault-tolerant (BFT) consensus algorithms are at the core of providing safety and
liveness guarantees for distributed systems that must operate in the presence of arbitrary …

Scalability is one of the main roadblocks to business adoption of blockchain systems.
Despite recent intensive research on using sharding techniques to enhance the scalability of …

Blockchain technology has emerged as the cornerstone of many decentralized applications
operating among otherwise untrusted peers. However, it is well known that existing …

With the growing commercial interest in blockchains, permissioned implementations have
received increasing attention. Unfortunately, the BFT consensus algorithms that are the …

The emergence of blockchains has fueled the development of resilient systems that can deal
with Byzantine failures due to crashes, bugs, or even malicious behavior. Recently, we have …

A blockchain is an append-only linked-list of blocks, which is maintained at each
participating node. Each block records a set of transactions and their associated metadata …

The eruption of a pandemic, such as COVID-19, can cause an unprecedented global crisis.
Contact tracing, as a pillar of communicable disease control in public health for decades …

Blockchain technology has a great potential for improving efficiency, security and privacy of
Electronic Health Records (EHR) sharing systems. However, existing solutions relying on a …

Blockchain serves as a replicated transactional processing system in a trustless distributed
environment. Existing blockchain systems all rely on an explicit ordering step to determine …