Colloquiums and Public Lectures

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2019

Date Information
​06 August 2019 ​Title: Fractal: A high-performance, scalable, proof-of-stake Blockchain

Professor Jonathan Katz
Time: 3.30pm to 4.30pm

Abstract
I will present Fractal, a high-performance, scalable, provably secure blockchain. The Fractal system incorporates two components. The first is a novel proof-of-stake protocol that is provably secure and addresses notorious challenges such as nothing-at-stake and grinding attacks. The second is a new method for achieving scalability by decoupling data distribution and data ordering to improve network throughput. Via rigorous analysis and real-world benchmarking, we show that Fractal achieves excellent block-propagation time as well as near-optimal throughput (up to 80% of the network-physical-limit). Fractal's cross-layer design can scale to 10,000+ nodes across the globe and, under modest network assumptions, sustain a throughput of 3,000+ tps.

Host: Division of Mathematical Sciences, School of Physical and Mathematical Sciences​
16 January 2019 ​Title: Characterization of Intersecting Families of Maximum Size in PSL(2,q)

Professor Qing Xiang
Time: 1.30pm to 2.30pm

Abstract

Host: Professor Bernhard Schmidt
Division of Mathematical Sciences, School of Physical and Mathematical Sciences
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