A blockchain is a distributed system that achieves strong security guarantees in storing,
managing, and processing data. All blockchains achieve a common goal: building a …

Blockchains are tamper evident and tamper resistant digital ledgers implemented in a
distributed fashion (ie, without a central repository) and usually without a central authority …

Blockchain is the technology used by developers of cryptocurrencies, like Bitcoin, to enable
exchange of financial “coins” between participants in the absence of a trusted third party to …

Cryptocurrency and blockchain technologies are recently gaining wide adoption since the
introduction of Bitcoin, being distributed, authority-free, and secure. Proof of Work (PoW) is at …

We present Poligraph, an intrusion-tolerant and decentralized fake news detection system.
Poligraph aims to address architectural, system, technical, and social challenges of building …

The recent surge in federated data management applications has brought forth concerns
about the security of underlying data and the consistency of replicas in the presence of …

Asynchronous BFT protocols such as HoneyBadgerBFT and BEAT are inherently robust
against timing, performance, and denial-of-service attacks. The protocols, however, achieve …

Recently, the emergence of blockchain has stirred great interests in the field of Internet of
Things (IoT). However, numerous non-trivial problems in the current blockchain system …

The runtime evolution of a system concerns the ability to make changes during runtime
without disrupting the service. Blockchain systems need to provide continuous service and …

Recently, blockchain has elicited escalating attention from academia to industry. However,
blockchain is still in its initial stage, and remains a great number of non-trivial problems to be …