This Week in Blockchain Research Issue #67

Issue #67


Issue #67

Paper of the Week:

Paper Title: A Gas-Efficient Superlight Bitcoin Client in Solidity.

TLDR:

  1. 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.

  2. To date, there is no commonly accepted decentralized pro- tocol that enables cross-chain transactions.

  3. 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.

  4. 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.

  5. 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.

  6. 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.

  7. 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.

AuthorsStelios Daveas†, Kostis Karantias‡, Aggelos Kiayias*‡, and Dionysis Zindros†‡,

Affiliations: * University of Edinburgh, † University of Athens, and ‡ IOHK.


Security:

No papers.


Privacy:

1. Paper Title: Data Confidentiality In P2P Communication And Smart Contracts Of Blockchain In Industry 4.0.

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.


Scalability:

No papers.


Proofs:

No papers.


Consensus:

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.

Authors: Søren Eller Thomsen* and Bas Spitters*,

Affiliations* Aarhus University.

2. Paper Title: Optimal Communication Complexity of Byzantine Consensus under Honest Majority.

Summary: A Byzantine consistent broadcast (BCB) protocol with linear communication complexity when f ≤ (1/2 − ε)n where ε is any positive constant.

Authors: Atsuki Momose* and Ling Ren†,

Affiliations* Nagoya University and † University of Illinois at Urbana-Champaign.

3. Paper Title: Blockchain Is Dead, Long Live Blockchain! Accountable State Machine Replication for Longlasting Blockchain.

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.

Authors: Alejandro Ranchal-Pedrosa* and Vincent Gramoli*†,

Affiliations* University of Sydney and † EPFL.


Tokenomics:

1. Paper Title: Blockchain and Cryptocurrencies: a Classification and Comparison of Architecture Drivers.

Summary: A conceptual framework to aid software architects, developers, and decision makers to adopt the right blockchain technology. 

AuthorsMartin Garriga*†$, Stefano Dalla Palma*†, Maxmiliano Arias‡, Alan De Renzis‡, Remo Pareschi§, Damian Andrew Tamburri†✜,

Affiliations: * Tilburg School of Economics and Management, † Jheronimus Academy of Data Science, ‡ Fidtech, § University of Molise, ✜ Technical Univ. of Eindhoven, $ National University of Comahue.


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