Concordia: A Streamlined Consensus Protocol for Blockchain Networksopen access
- Authors
- Santiago, Carlos; Ren, Shuyang; Lee, Choonhwa; Ryu, Minsoo
- Issue Date
- Jan-2021
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Protocols; Consensus protocol; Security; Scalability; Safety; Fault tolerant systems; Fault tolerance; Blockchain; Byzantine fault tolerance; consensus; transaction processing
- Citation
- IEEE ACCESS, v.9, pp.13173 - 13185
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE ACCESS
- Volume
- 9
- Start Page
- 13173
- End Page
- 13185
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/142550
- DOI
- 10.1109/ACCESS.2021.3051796
- ISSN
- 2169-3536
- Abstract
- In this paper, we present a novel Byzantine fault-tolerant consensus protocol for sharded blockchain networks that does not rely on expensive leader-driven communication. The proposed protocol selects a single block proposer at a time and uses threshold signatures as a voting mechanism to confirm the validity of the proposed block. By using a gossip-like communication scheme, each node can collect and recover the group signature within O(logN) steps. With only one block proposer per consensus round, there is no possibility of conflicting blocks and resultant forks. Therefore, our consensus protocol requires only one round of one-way communication to achieve finality for each block. Our protocol guarantees safety and liveness while tolerating up to f faulty participants among 2f + 1 nodes. Our performance study shows that the proposed protocol enables hundreds of nodes to participate in the agreement process, and can finalize large blocks in approximately 10 seconds.
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Collections - 서울 공과대학 > 서울 컴퓨터소프트웨어학부 > 1. Journal Articles
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