Greetings!

Welcome to the IC3 Research Newsletter! This is a new publication devoted to providing timely updates highlighting the exciting blockchain research IC3 faculty, students, and partners publish. This will supplement our Quarterly Newsletters and be published monthly (nominally).

Please send any new research or presentations to  sarahallen@cornell.edu  to be included in the next research update.
 
Best wishes,
 
Sarah Allen
IC3 Community Manager 
 
PRESENTATIONS
Phil Daian presented  Flash Boys 2.0: Frontrunning in Decentralized Exchanges, Miner Extractable Value, and Consensus Instability at IEEE Symposium on Security & Privacy ‘20 on May 18-20, 2020.
 
RESEARCH

Summary: DP-3T is a decentralized, secure proximity tracing system to assist governments in tracing the spread of COVID-19. It aims to make contact tracing possible in a privacy preserving manner using ephemeral identifiers broadcast via bluetooth. 
An international consortium of technologists, legal experts, engineers and epidemiologists, including IC3 faculty member Srđan Čapkun (ETH Zurich)
Press:  EPFL News
Twitter: Announcement of Prototype Applications
Summary: The authors analyze privacy in the Lightning Network. They present 3 main attacks based on publicly available information to learn information that is intended to be secret. 
George Kappos (UCL), Haaroon Yousaf (UCL), Ania M. Piotrowska (UCL, NYM Technologies), Sanket Kanjalkar (UIUC), Sergi Delgado-Segura (PISA Research), Andrew Miller (UIUC), and Sarah Meiklejohn (UCL)
Press:  Coindesk
 
Summary: The authors propose a practical, simple, and clean model of asynchronous non-Byzantine consensus.
Bryan Ford (EPFL), Philipp Jovanovic (UCL), Ewa Syta (Trinity College Hartford)
 
Summary: The authors identify that in leader based consensus protocols, a malicious leader can manipulate transaction ordering. They propose a third fundamental property (in addition to consistency and liveness) of consensus: order-fairness. They propose a new class of consensus protocols called Aequitas, which achieve all three properties. 
M Kelkar, F Zhang, S Goldfeder, A Juels (All Cornell University, Cornell Tech)
 
Summary: The authors show how to build a tailored protocol for threshold ECDSA with cheater detection and present a highly efficient protocol that allows players to participate without needing to be online at the same time.
Rosario Gennaro (CUNY) and Steven Goldfeder (Cornell Tech/ Offchain Labs)
 
Summary: The authors present an idealized version of the proposed Ethereum 2.0 “beacon chain,” a proof-of-stake-based consensus protocol that combines Casper FFG, a finality tool, with LMD GHOST, a fork-choice rule.
Vitalik Buterin (Ethereum Foundation), Diego Hernandez (SJSU), Thor Kamphefner (SJSU), Khiem Pham (VinAI Research), Zhi Qiao (SJSU), Danny Ryan (Ethereum Foundation), Juhyeok Sin (SJSU), Ying Wang (SJSU), Yan X Zhang (SJSU)
 
Summary: The authors propose a natural, streamlined protocol for constructing consensus protocols which proceeds in synchronized epochs. Players notarize blocks, and an epoch is finalized when all blocks in it are notarized. 
Benjamin Y Chan and Elaine Shi (All Cornell University)
Blog Presentation by Benjamin Y Chan (begins at 5:55:42)
 
Summary: Twins is a new way to test Byzantine Fault Tolerant systems by running two instances of a node with the same identity. Twins can systematically generate attack scenarios and execute them in a controlled manner to check for desired system properties. 
Shehar Bano, Alberto Sonnino, Andrey Chursin, Dmitri Perelman, Dahlia Malkhi (All Calibra)
Press:  Cointelegraph
 
Summary: Chainlink VRF utilizes verifiable random functions to generate randomness that is verifiable on-chain.
Chainlink Research Team
 
Summary: The researchers explore the precise latency to commit measured in time of byzantine broadcast. They propose the first byzantine broadcast protocol with optimal good-case latency.  
Ittai Abraham (VMware Research), Kartik Nayak (Duke), Ling Ren (UIUC), and Zhuolun Xiang (UIUC)
 
Summary: The authors propose a standard for proof of liabilities and reserves in a way that preserves privacy while increasing transparency for users. It combines previously devised cryptographic techniques into a layered solution with predefined levels of privacy in the form of gadgets.
Konstantinos Chalkias, Kevin Lewi, Payman Mohassel, Valeria Nikolaenko (All Calibra) 
Press:  Cointelegraph
 
AWARDS

Dawn Song was awarded 3 Test-of-Time Awards at the IEEE Symposium on Security & Privacy ‘20 on May 18-20, 2020. Watch the Presentation of the Test of Time Awards by Prof. David Evans.



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