Blockchain (eg, Bitcoin and Ethereum) has drawn much attention and has been widely-
deployed in recent years. However, blockchain scalability is emerging as a challenging …

As a decentralized distributed ledger, blockchain has developed rapidly since its birth and
has been highly valued by governments, academia, and industry. Start in the financial field …

As an important technology to ensure data security, consistency, traceability, etc., blockchain
has been increasingly used in Internet of Things (IoT) applications. The integration of …

Since the inception of Bitcoin, a plethora of distributed ledgers differing in design and
purpose has been created. While by design, blockchains provide no means to securely …

Analysis of blockchain data is useful for both scientific research and commercial
applications. We present BlockSci, an open-source software platform for blockchain …

Proof-of-work (PoW) cryptocurrency blockchains like Bitcoin secure vast amounts of money.
Their operators, called miners, expend resources to generate blocks and receive monetary …

We present and analyze an attack on Ethereum 1's consensus mechanism, which allows
miners to obtain higher mining rewards compared to their honest peers. This attack is novel …

Bitcoin uses the proof-of-work (PoW) mechanism where nodes earn rewards in return for the
use of their computing resources. Although this incentive system has attracted many …

Mining attacks allow attackers to gain an unfair share of the mining reward by deviating from
the honest mining strategy in the Bitcoin system. Among the most well-known are block …

Proof-of-Work (PoW) is the most widely adopted incentive model in current blockchain
systems, which unfortunately is energy inefficient. Proof-of-Stake (PoS) is then proposed to …