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- posterNovember 2019
Poster: GRANDPA Finality Gadget
CCS '19: Proceedings of the 2019 ACM SIGSAC Conference on Computer and Communications SecurityNovember 2019, Pages 2649–2651https://doi.org/10.1145/3319535.3363278We present GRANDPA, a finality gadget, that is a protocol that can be used to provide provable finality for a blockchain. It works in addition to a block production mechanism and a chain selection rule, that on their own would only provide eventual ...
- posterNovember 2019
Poster: A Proof-of-Stake (PoS) Blockchain Protocol using Fair and Dynamic Sharding Management
CCS '19: Proceedings of the 2019 ACM SIGSAC Conference on Computer and Communications SecurityNovember 2019, Pages 2553–2555https://doi.org/10.1145/3319535.3363254Sharding-based consensus protocols were introduced to enable the parallelization of the consensus work and storage for blockchain systems. However, existing sharding-based consensus algorithms are not sufficiently designed for distributing miners and ...
- research-articleNovember 2019
Prism: Deconstructing the Blockchain to Approach Physical Limits
CCS '19: Proceedings of the 2019 ACM SIGSAC Conference on Computer and Communications SecurityNovember 2019, Pages 585–602https://doi.org/10.1145/3319535.3363213The concept of a blockchain was invented by Satoshi Nakamoto to maintain a distributed ledger. In addition to its security, important performance measures of a blockchain protocol are its transaction throughput and confirmation latency. In a ...
- research-articleNovember 2019
Atomic Multi-Channel Updates with Constant Collateral in Bitcoin-Compatible Payment-Channel Networks
CCS '19: Proceedings of the 2019 ACM SIGSAC Conference on Computer and Communications SecurityNovember 2019, Pages 801–815https://doi.org/10.1145/3319535.3345666Current cryptocurrencies provide a heavily limited transaction throughput that is clearly insufficient to cater their growing adoption. Payment-channel networks (PCNs) have emerged as an interesting solution to the scalability issue and are currently ...
- research-articleNovember 2019
You Shall Not Join: A Measurement Study of Cryptocurrency Peer-to-Peer Bootstrapping Techniques
CCS '19: Proceedings of the 2019 ACM SIGSAC Conference on Computer and Communications SecurityNovember 2019, Pages 2231–2247https://doi.org/10.1145/3319535.3345649Cryptocurrencies are digital assets which depend upon the use of distributed peer-to-peer networks. The method a new peer uses to initially join a peer-to-peer network is known as bootstrapping. The ability to bootstrap without the use of a centralized ...