Since the last research update, IC3 researchers presented five papers at FC'22, explored the NFT art market, suggested ways to improve smart contracts during network congestion, won a best paper award at EURO/SYS’22, and more! If you are an IC3 member, please register for the 2022 IC3 Blockchain Camp (Aug. 1-7) in Ithaca!

2022 IC3 Blockchain Camp: August 1-7 in Ithaca!

IC3 Faculty, Students, Alumni, Fellows and Partners: Please join us for the 2022 IC3 Blockchain Camp in-person on the Cornell campus in Ithaca, NY! Please note that dates have shifted from the initial announcement. 

See more: IC3 Website

Register: Here

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Narwhal and Tusk: A DAG-based Mempool and Efficient BFT Consensus won a Best Paper Award at EURO/SYS’22!

The authors propose separating the task of reliable transaction dissemination from transaction ordering. They design and evaluate a mempool protocol, Narwhal, specializing in high-throughput reliable dissemination and storage of causal histories of transactions.

George Danezis (Mysten Labs & UCL), Eleftherios Kokoris Kogias (IST Austria), Alberto Sonnino (Mysten Labs), Alexander Spiegelman (Aptos) 

Five papers by IC3 authors were presented at FC’22!

Sliding Window Challenge Process for Congestion Detection

The authors suggest ways to auto-extend deadlines in smart contracts during times of network congestion. 

Ayelet Lotem (The Hebrew University of Jerusalem), Sarah Azouvi (Protocol Labs), Patrick McCorry (Infura), Aviv Zohar (The Hebrew University of Jerusalem)

SnarkPack: Practical SNARK Aggregation 

The authors present SnarkPack, a new argument that further reduces the size of SNARK proofs by means of aggregation. It is designed to work with Groth16 scheme and has logarithmic size proofs and a verifier that runs in logarithmic time in the number of proofs to be aggregated and reuses the public parameters from Groth16 system.

Anca Nitulescu (Protocol Labs), Nicolas Gailly (Protocol Labs), Mary Maller (Ethereum Foundation)

Be Aware of Your Leaders

The authors introduce Carousel, a novel, reputation-based Leader-rotation solution to achieve Leader-Aware SMR. Among other properties, it formalizes a Leader-utilization requirement that bounds the number of rounds whose leaders are faulty in crash-only executions.

Shir Cohen (Technion & Novi Research), Rati Gelashvili (Novi Research), Eleftherios Kokoris Kogias (IST Austria & Novi Research), Zekun Li (Facebook/Novi), Dahlia Malkhi (Novi Research), Alberto Sonnino (Novi Research), Alexander Spiegelman (Novi Research)

Jolteon and Ditto: Network-Adaptive Efficient Consensus with Asynchronous Fallback

The authors present Ditto, a Byzantine SMR protocol that enjoys the best of both worlds: optimal communication on and off the happy path (linear and quadratic, respectively) and progress guarantee under asynchrony and DDoS attacks. They also design a 2-chain version of HotStuff, Jolteon, which leverages a quadratic view-change mechanism to reduce the latency of the standard 3-chain HotStuff

Rati Gelashvili (Novi Research), Elefteris Kokoris-Kogias (Novi Research & IST Austria), Alberto Sonnino (Novi Research), Alexander Spiegelman (Novi Research), Zhuolun Xiang (UIUC)

Decentralization Conscious Players And System Reliability

The authors propose a game-theoretic model of the reliability of decentralized systems based on Varian’s model of system reliability to which they add a new normalized total effort case that models decentralization conscious players who prioritize decentralization.

Sarah Azouvi (Protocol Labs), Alexander Hicks (University College London)


NFTs for Art and Collectables: Primer and Outlook

The authors give non-technical readers a basic familiarity with the traditional art market, the technology behind NFTs, the history of their development, the current state of the NFT community and marketplace, and a notion of how NFTs might evolve in the future.

Sarah Allen (Cornell Tech, IC3), Ari Juels (Cornell Tech, IC3), Mukti Khaire (Cornell Tech, Cornell), Tyler Kell (Cornell Tech, IC3), and Siddhant Shrivastava (SUTD)

Press: Cornell Tech

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Broken Proofs of Solvency in Blockchain Custodial Wallets and Exchanges

The authors provide an overview of broken liability proof systems used in production today and suggest fixes.

Konstantinos Chalkias (Meta / Novi Financial), Panagiotis Chatzigiannis (George Mason University), Yan Ji (Cornell University)

UTT: Decentralized Ecash with Accountable Privacy

The authors present UnTraceable Transactions (UTT), a system for decentralized ecash with accountable privacy. UTT is the first ecash system that combines: decentralized trust (BFT), balances accountability and privacy via anonymity budgets, high throughput and low latency via optimized crypto vertical and horizontal scaling.

Alin Tomescu (VMware), Adithya Bhat (VMware and Purdue), Benny Applebaum (VMware and TAU), Ittai Abraham (VMware), Guy Gueta (VMware), Benny Pinkas (VMware and BIU), Avishay Yanai (VMware) 

Twitter TL;DR: Ittai Abraham


IC3 was proud to support the Cornell Fintech Club’s 2022 Hackathon! Over 100 undergraduate students built blockchain projects on Avalanche.


ConsensusDay 22: Call for Contributions!

ConsensusDay 22, hosted by IC3 Partner Protocol Labs Research, aims to provide a forum for the discussion of early-stage but high-impact research with scientific interest and real-world applications. 

Learn more and submit: Here (Deadline June 24)

Platypus: A Central Bank Digital Currency with Unlinkable Transactions and Privacy Preserving Regulation by Karl Wüst, Kari Kostiainen, and Srdjan Capkun (all ETH Zurich at the time of the work) was selected in the top five finalists for the 2022 ETH Zurich Spark Award

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Recordings are available for Patrick McCorry’s 2022 online cryptocurrency class! The two most recent lectures cover “Scaling with Bridges in a Multi-chain World” and “Plasma to Rollups.”

Course page: Github 

Please send any new research or presentations to to be included in the next research update.


Best wishes, 

Sarah Allen

IC3 Research Program Manager

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