This Week in Blockchain Research Issue #60
|Jun 10, 2020|
Paper of the Week:
Paper Title: An airdrop that preserves recipient privacy.
Newly-created cryptocurrencies face a chicken-and-egg problem: users appear to prefer currencies that already have a thriving ecosystem.
An airdrop is designed to transfer value to passive recip- ients. To be most effective at recruiting new users, an airdrop should not require recipients to enroll ahead of time—or, in the best case, even to know about the airdrop in advance.
Airdrops have a serious flaw: they offer no privacy to their recipients. This means that an observer can easily learn whether or not any given recipient has claimed her airdropped value.
Even cryptocurrencies that provide anonymity mechanisms for on-chain transactions do not prevent this leakage, because a recipient must first use her existing identity to claim the airdropped funds.
Existing solutions fall short of addressing this issue. The simplest possible approach—sending each recipient a fresh secret key for claiming her funds— carries an even stronger disincentive: it requires recipients to trust the sender.
This work builds an efficient and practical private airdrop system using special-purpose zero-knowledge proofs designed for this task.
It exhibits practical private airdrop schemes designed to work with ECDSA and RSA credentials.
Next, it carefully describes how to use private airdrops to bootstrap a new cryptocurrency, a scheme called a private genesis airdrop.
1. Paper Title: Blockchain with Varying Number of Players.
Summary: Does Nakamoto’s protocol satisfy consistency and liveness when the total computing power in the network can vary, assuming just an upper-bound on the maximum network delay?
2. Paper Title: Bitcoin covenants unchained.
Summary: A formal model of covenants, which can be implemented with minor modifications to Bitcoin.
Authors: Massimo Bartoletti*, Stefano Lande*, and Roberto Zunino†,
1. Paper Title: Ledger Combiners for Fast Settlement.
Summary: Combining a family of existing ledgers into a new, virtual ledger that provides amplified security properties.
Summary: A novel notion of Decentralized Clock/Time (DC/DT) as global and logical clock/time which can be agreed upon as a consensus.
Authors: Wenbo MAO* and Wenxiang WANG*,
Affiliations: * LotMint DAO.
Summary: This work examines the economic consequences of an interest-bearing design of the Central-Bank Digital Currency (CBDC), and extends the discussion to an open-economy context with trade and capital flows.
Authors: Ammu George*, Taojun Xie†, and Joseph D. Alba*,
Summary: This study provides a better understanding of the business and legal environment surrounding Initial Coin Offerings (ICOs).
Affiliations: * John Molson School of Business.
3. Paper Title: The Public Blockchain Ecosystem: An Empirical Analysis.
Summary: This paper offers an organizing empirical framework to understand the largely unexplored public blockchain ecosystem.
4. Paper Title: A Survey of Fintech Research and Policy Discussion.
Summary: This paper provides a comprehensive fintech literature survey with relevant research studies and policy discussion around the various aspects of fintech.
Conferences, Journals, & CFPs:
October 21-23 - The second ACM conference on Advances in Financial Technologies (AFT’20) (New York City)
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