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An Efficient and Robust Committee Structure for Sharding Blockchain [article]

Mengqian Zhang, Jichen Li, Zhaohua Chen, Hongyin Chen, Xiaotie Deng
2021 arXiv   pre-print
In addition, we introduce a referee committee and partial sets in each committee, and design a recovery procedure in case the leader is malicious.  ...  In order to break the performance bottlenecks, we propose a reputation mechanism for selecting leaders. The term of reputation in our design reflects each node's honest computation resources.  ...  SSChain [26] introduces a root chain in Cryptology - CRYPTO 2017 - 37th Annual International Cryptology Conference, Santa  ... 
arXiv:2112.15322v1 fatcat:uaqrt57nt5hhxm6lxl5zua4jmq

Quantum Lazy Sampling and Game-Playing Proofs for Quantum Indifferentiability [article]

Jan Czajkowski, Christian Majenz, Christian Schaffner, Sebastian Zur
2021 arXiv   pre-print
Subsequently, we use our game-playing framework to prove quantum indifferentiability of the sponge construction, assuming a random internal function.  ...  First, we describe how Zhandry's compressed quantum oracles~(Crypto'19) can be used to do quantum lazy sampling of a class of non-uniform function distributions.  ...  In: Advances in Cryptology -CRYPTO 2019 -39th Annual International Cryptology Conference, Santa Barbara, CA, USA, August 18-22, 2019, Proceedings, Part II. 2019, pp. 296-325.  ... 
arXiv:1904.11477v4 fatcat:hlqvigznjnhe3bqls7t6t5n6fe