5 papers
Cassandra: Consensus with Partial Progress via Robust Partitionable View Synchronization
Shaokang Xie, Dakai Kang, Junchao Chen +3
Replicated databases and permissioned blockchain systems rely on Byzantine Fault-Tolerant (BFT) consensus to maintain a globally consistent order of transactions across distributed…
FairDAG: Consensus Fairness over Multi-Proposer Causal Design
Dakai Kang, Junchao Chen, Tien Tuan Anh Dinh +1
The rise of cryptocurrencies like Bitcoin and Ethereum has driven interest in blockchain database technology, with smart contracts enabling the growth of decentralized finance (DeF…
Did we miss P In CAP? Partial Progress Conjecture under Asynchrony
Junchao Chen, Suyash Gupta, Daniel P. Hughes +1
Each application developer desires to provide its users with consistent results and an always-available system despite failures. Boldly, the CALM theorem disagrees. It states that…
Securing Consensus from Long-Range Attacks through Collaboration
Junchao Chen, Suyash Gupta, Alberto Sonnino +2
Decentralized systems built around blockchain technology promise clients an immutable ledger. They add a transaction to the ledger after it undergoes consensus among the replicas t…
Thunderbolt: Concurrent Smart Contract Execution with Non-blocking Reconfiguration for Sharded DAGs
Junchao Chen, Alberto Sonnino, Lefteris Kokoris-Kogias +1
Sharding has emerged as a critical technique for enhancing blockchain system scalability. However, existing sharding approaches face unique challenges when applied to Directed Acyc…