This Week in Blockchain Research Issue #67
|zk Capital||Jul 29, 2020|
Paper of the Week:
Blockchain interoperability is the ability of distinct blockchains to communicate. This crosschain communication enables useful features across blockchains such as the transfer of assets from one chain to another (one-way peg) and back (two-way peg), as well as the generic passing of information from chain to chain.
To date, there is no commonly accepted decentralized pro- tocol that enables cross-chain transactions.
In order to perform crosschain operations, mechanism that allows users of blockchain A to discover events that have occurred in chain B, such as settled transactions, must be introduced.
One tricky aspect is to ensure the atomicity of such operations, which require that either the transactions take place in both chains, or in neither. This is achievable through atomic swaps.
However, atomic swaps provide limited functionality in that they do not allow the generic transfer of information from one blockchain to a smart contract in another.
By utilizing superlight client protocols, a compressed proof for an event in chain A is constructed and dispatched to chain B. This communication is realized without the intervention of trusted third-parties.
This work leverages superblocks Non-Interactive Proofs of Proof-of-Work (NIPoPoWs) as the fundamental building block and refines it to provide a practical solution. The result is the first on-chain decentralized client that securely verifies crosschain events and is practical.
Summary: An audit trail can be managed by the blockchain without having send the data through the blockchain.
Authors: Jan Stodt* and Christoph Reich*,
Affiliations: * University of Applied Sciences Furtwangen.
1. Paper Title: Formalizing Nakamoto-Style Proof of Stake.
Summary: The first machine checked proof that guarantees both safety and liveness for a consensus algorithm.
Affiliations: * Aarhus University.
Summary: A Byzantine consistent broadcast (BCB) protocol with linear communication complexity when f ≤ (1/2 − ε)n where ε is any positive constant.
Summary: The first Longlasting Blockchain system, that relies on the deceitful failure model where most replicas are either incentivized to foment a coalition and steal assets or rewarded to participate correctly.
Summary: A conceptual framework to aid software architects, developers, and decision makers to adopt the right blockchain technology.
Authors: Martin Garriga*†$, Stefano Dalla Palma*†, Maxmiliano Arias‡, Alan De Renzis‡, Remo Pareschi§, Damian Andrew Tamburri†✜,
Conferences, Journals, & CFPs:
September 17-18 - Cryptocurrencies and Blockchain Technology (CBT’2020) (United Kingdom)
October 21-23 - The second ACM conference on Advances in Financial Technologies (AFT’20) (New York City)
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