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The rapid expansion of the use of blockchain-based systems often leads to a choice between customizable private blockchains and more secure, scalable and decentralized but expensive public blockchains. This choice represents the trade-off…

Cryptography and Security · Computer Science 2023-06-06 Thomas Lavaur , Jonathan Detchart , Jérôme Lacan , Caroline P. C. Chanel

Prompting a language model (LM) is an increasingly important research topic for better utilization of large language models (LLMs). While simple prompting is effective for single-step questions, it fails to activate the correct knowledge…

Artificial Intelligence · Computer Science 2025-10-09 Iok Tong Lei , Ziyu Zhu , Han Yu , Yige Yao , Zhidong Deng

Large proof of work (PoW) networks allow anyone to earn rewards by running computation-intensive hash puzzles for profit, yet they typically consume electricity comparable to that of medium-sized countries. Repurposing computing resources…

Cryptography and Security · Computer Science 2026-05-06 Peihao Li , Nadia Dahmani

In the current digital landscape, supply chains have transformed into complex networks driven by the Internet of Things (IoT), necessitating enhanced data sharing and processing capabilities to ensure traceability and transparency.…

Cryptography and Security · Computer Science 2024-10-22 Amir Jabbari , Gowri Ramachandran , Sidra Malik , Raja Jurdak

Liquid staking has become the largest category of decentralized finance protocols in terms of total value locked. However, few studies exist on its implementation designs or underlying risks. The liquid staking protocols allow for earning…

Cryptography and Security · Computer Science 2024-01-30 Krzysztof Gogol , Benjamin Kraner , Malte Schlosser , Tao Yan , Claudio Tessone , Burkhard Stiller

A blockchain is a decentralized ledger where all transactions are recorded. For having a reliable blockchain and double-spending prevention, we need a decentralized consensus and agreement on a blockchain. Bitcoin uses proof-of-work (PoW).…

Cryptography and Security · Computer Science 2019-05-06 Siamak Solat

In decentralized web applications, users face an inherent conflict between public verifiability and personal privacy. To participate in regulated on-chain services, users must currently disclose sensitive identity documents to centralized…

Cryptography and Security · Computer Science 2026-03-18 Supriya Khadka , Sanchari Das

Modern blockchains face a scalability challenge due to the intrinsic throughput limitations of consensus protocols. Layer 2 optimistic rollups (L2) are a faster alternative that offer the same interface in terms of smart contract…

Cryptography and Security · Computer Science 2024-06-05 Margarita Capretto , Martín Ceresa , Antonio Fernández Anta , Pedro Moreno-Sánchez , César Sánchez

The rapid integration of Large Language Models (LLMs) into decentralized physical infrastructure networks (DePIN) is currently bottlenecked by the Verifiability Trilemma, which posits that a decentralized inference system cannot…

Cryptography and Security · Computer Science 2025-12-24 Aaron Chan , Alex Ding , Frank Chen , Alan Wu , Bruce Zhang , Arther Tian

The primary innovation we pioneer -- focused on blockchain information security -- is called the Safe-House. The Safe-House is badly needed since there are many ongoing hacks and security concerns in the DeFi space right now. The Safe-House…

Cryptography and Security · Computer Science 2023-12-04 Ravi Kashyap

We present a novel class of proof-of-position algorithms: Tree-Proof-of-Position (T-PoP). This algorithm is decentralised, collaborative and can be computed in a privacy preserving manner, such that agents do not need to reveal their…

Data Structures and Algorithms · Computer Science 2024-06-05 Aida Manzano Kharman , Pietro Ferraro , Homayoun Hamedmoghadam , Robert Shorten

With the development of precise positioning technology, a growing number of location-based services (LBSs) facilitate people's life. Most LBSs require proof of location (PoL) to prove that the user satisfies the service requirement, which…

Cryptography and Security · Computer Science 2024-06-27 Wei Wu , Erwu Liu , Xinglin Gong , Rui Wang

Blockchain applications that rely on the Proof-of-Work (PoW) have increasingly become energy inefficient with a staggering carbon footprint. In contrast, energy-efficient alternative consensus protocols such as Proof-of-Stake (PoS) may…

Cryptography and Security · Computer Science 2021-01-05 Muhammad Saad , Zhan Qin , Kui Ren , DaeHun Nyang , David Mohaisen

To address the large amount of energy wasted by blockchains, we propose a decentralized consensus protocol for blockchains in which the computation can be used to search for good approximate solutions to any optimization problem. Our…

Distributed, Parallel, and Cluster Computing · Computer Science 2019-12-03 Naoki Shibata

As cryptographic tokens and altcoins are increasingly being built to serve as utility tokens, the notion of useful work consensus protocols, as opposed to number-crunching PoW consensus, is becoming ever more important. In such contexts,…

Cryptography and Security · Computer Science 2019-05-13 Michał Król , Alberto Sonnino , Mustafa Al-Bassam , Argyrios Tasiopoulos , Ioannis Psaras

Blockchain intercommunication systems enable the exchanges of messages between blockchains. This interoperability promotes innovation, unlocks liquidity and access to assets. However, blockchains are isolated systems that originally were…

Cryptography and Security · Computer Science 2022-10-25 Miguel Díaz Montiel , Rachid Guerraoui , Pierre-Louis Roman

Consensus protocols used today in blockchains often rely on computational power or financial stakes - scarce resources. We propose a novel protocol using social capital - trust and influence from social interactions - as a non-transferable…

Cryptography and Security · Computer Science 2025-11-06 Juraj Mariani , Ivan Homoliak

Blockchains facilitate decentralization, security, identity, and data management in cyber-physical systems. However, consensus protocols used in blockchains are prone to high message and computational complexity costs and are not suitable…

Distributed, Parallel, and Cluster Computing · Computer Science 2023-03-28 Alexander Mozeika , Mohammad M. Jalalzai , Marcin P. Pawlowski

Bitcoin uses blockchain technology and proof-of-work (PoW) mechanism where nodes spend computing resources and earn rewards in return for spending these resources. This incentive system has caused power to be significantly biased towards a…

Cryptography and Security · Computer Science 2019-09-04 Yujin Kwon , Jian Liu , Minjeong Kim , Dawn Song , Yongdae Kim

Multi-party data management and blockchain systems require data sharing among participants. To provide resilient and consistent data sharing, transactions engines rely on Byzantine FaultTolerant consensus (BFT), which enables operations…

Databases · Computer Science 2021-02-24 Suyash Gupta , Jelle Hellings , Sajjad Rahnama , Mohammad Sadoghi
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