Proceedings ArticleDOI
A Secure Sharding Protocol For Open Blockchains
Loi Luu,Viswesh Narayanan,Chaodong Zheng,Kunal Baweja,Seth Gilbert,Prateek Saxena +5 more
- pp 17-30
TLDR
ELASTICO is the first candidate for a secure sharding protocol with presence of byzantine adversaries, and scalability experiments on Amazon EC2 with up to $1, 600$ nodes confirm ELASTICO's theoretical scaling properties.Abstract:
Cryptocurrencies, such as Bitcoin and 250 similar alt-coins, embody at their core a blockchain protocol --- a mechanism for a distributed network of computational nodes to periodically agree on a set of new transactions. Designing a secure blockchain protocol relies on an open challenge in security, that of designing a highly-scalable agreement protocol open to manipulation by byzantine or arbitrarily malicious nodes. Bitcoin's blockchain agreement protocol exhibits security, but does not scale: it processes 3--7 transactions per second at present, irrespective of the available computation capacity at hand. In this paper, we propose a new distributed agreement protocol for permission-less blockchains called ELASTICO. ELASTICO scales transaction rates almost linearly with available computation for mining: the more the computation power in the network, the higher the number of transaction blocks selected per unit time. ELASTICO is efficient in its network messages and tolerates byzantine adversaries of up to one-fourth of the total computational power. Technically, ELASTICO uniformly partitions or parallelizes the mining network (securely) into smaller committees, each of which processes a disjoint set of transactions (or "shards"). While sharding is common in non-byzantine settings, ELASTICO is the first candidate for a secure sharding protocol with presence of byzantine adversaries. Our scalability experiments on Amazon EC2 with up to $1, 600$ nodes confirm ELASTICO's theoretical scaling properties.read more
Citations
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Journal ArticleDOI
Cooperative Mining System to Improve Bitcoin Scalability
TL;DR: The Cooperative Mining System (CMS) as mentioned in this paper was proposed to improve the scalability of the Bitcoin system by increasing the transaction throughput and eliminating transaction latency and starvation without affecting decentralization and security.
Journal ArticleDOI
The construction of blockchain platform for engineering museums based on vectorized image processing technology
TL;DR: Wang et al. as mentioned in this paper proposed a hierarchical blockchain architecture to store block data in multiple distributed cloud servers and edge servers in a hierarchical manner to cope with the growing data volume in the industrial Internet.
Proceedings ArticleDOI
CougaR: fast and eclipse-resilient dissemination for blockchain networks
TL;DR: CougaR's key advantages stem from its link selection policy, which combines a network latency criterion with randomness to offer fast and reliable block dissemination to the entire network.
Book ChapterDOI
Elastic Resource Allocation in Sharding-Based Blockchains
TL;DR: In this article , a drift-plus-penalty (DPP) algorithm was proposed to solve the problem of bursty-TX injection attacks in PBFT-based sharded permissioned blockchain.
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