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Blockchains face a scalability challenge due to the intrinsic throughput limitations of consensus protocols and the limitation in block sizes due to decentralization. An alternative to improve the number of transactions per second is to use…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-03-10 Margarita Capretto , Martín Ceresa , Antonio Fernández Anta , Pedro Moreno-Sánchez , César Sánchez

Increasing the transactional throughput of decentralized blockchains in a secure manner has been the holy grail of blockchain research for most of the past decade. This paper introduces a scheme for scaling blockchains while retaining…

Cryptography and Security · Computer Science 2020-07-27 John Adler , Mikerah Quintyne-Collins

Blockchains face a scalability limitation, partly due to the throughput limitations of consensus protocols, especially when aiming to obtain a high degree of decentralization. Layer 2 Rollups (L2s) are a faster alternative to conventional…

Cryptography and Security · Computer Science 2025-09-11 Margarita Capretto , Martín Ceresa , Antonio Fernández Anta , Pedro Moreno-Sanchez , César Sánchez

The thesis addresses the problem of scalability in decentralized blockchains in the context of the trade-off between transaction throughput and hardware requirements to participate in the network. Rollups are presented, that is technologies…

Cryptography and Security · Computer Science 2022-11-01 Luca Donno

Blockchain networks provide a reliable trust anchor to decentralized applications (DApps) backed by smart contracts. The Ethereum ecosystem now encompasses most blockchain networks that provide compatible support for smart contracts code.…

Software Engineering · Computer Science 2025-04-16 Cătălina Lazăr , Gabriela Secrieru , Emanuel Onica

An optimistic rollup (ORU) scales a blockchain's throughput by delegating computation to an untrusted remote chain (L2), refereeing any state claim disagreements between mutually distrusting L2 operators via an interactive dispute…

Cryptography and Security · Computer Science 2024-01-05 Zhe Ye , Ujval Misra , Jiajun Cheng , Wenyang Zhou , Dawn Song

Setchain has been proposed to increase blockchain scalability by relaxing the strict total order requirement among transactions. Setchain organizes elements into a sequence of sets, referred to as epochs, so that elements within each epoch…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-09-15 Arivarasan Karmegam , Gabina Luz Bianchi , Margarita Capretto , Martín Ceresa , Antonio Fernández Anta , César Sánchez

Blockchain technologies are facing a scalability challenge, which must be overcome to guarantee a wider adoption of the technology. This scalability issue is due to the use of consensus algorithms to guarantee the total order of the chain…

Distributed, Parallel, and Cluster Computing · Computer Science 2023-02-10 Margarita Capretto , Martín Ceresa , Antonio Fernández Anta , Antonio Russo , César Sánchez

Blockchain technologies are facing a scalability challenge, which must be overcome to guarantee a wider adoption of the technology. This scalability issue is mostly caused by the use of consensus algorithms to guarantee the total order of…

Distributed, Parallel, and Cluster Computing · Computer Science 2022-06-24 Margarita Capretto , Martín Ceresa , Antonio Fernández Anta , Antonio Russo , César Sánchez

The growing scalability demand of public Blockchains led to the rise of Layer-2 solutions, such as Rollups. Rollups improve transaction throughput by processing operations off-chain and posting the results on-chain. A critical component in…

Cryptography and Security · Computer Science 2026-03-24 Giovanni Maria Cristiano , Salvatore D'Antonio , Jonah Giglio , Giovanni Mazzeo , Luigi Romano

The scalability limitations of public blockchains have hindered their widespread adoption in real-world applications. While the Ethereum community is pushing forward in zk-rollup (zero-knowledge rollup) solutions, such as introducing the…

Cryptography and Security · Computer Science 2024-03-19 Chengpeng Huang , Rui Song , Shang Gao , Yu Guo , Bin Xiao

Rollups have emerged as a promising solution to enhance blockchain scalability, offering increased throughput, reduced latency, and lower transaction fees. However, they currently rely on a centralized sequencer to determine transaction…

Networking and Internet Architecture · Computer Science 2023-10-06 Shashank Motepalli , Luciano Freitas , Benjamin Livshits

Layer 2 (L2) protocols, payment channels, sidechains, and rollups, are central to blockchain scalability, enabling off-chain execution while preserving on-chain security. Despite growing deployment, existing security models remain…

Cryptography and Security · Computer Science 2026-05-19 Zeta Avarikioti , Matteo Maffei , Yuheng Wang

Layer 2 systems have received increasing attention due to their potential to scale the throughput of L1 blockchains. To avoid the cost of putting data on chain, these systems increasingly turn to off-chain data availability solutions such…

Cryptography and Security · Computer Science 2023-06-21 Ertem Nusret Tas , Dan Boneh

The development of underlying technologies in blockchain mostly revolves around a difficult problem: how to enhance the performance of the system and reduce various costs of nodes (such as communication, storage and verification) without…

Cryptography and Security · Computer Science 2023-12-04 Lide Xue , Wei Yang , Wei Li

A rollup network is a type of popular "Layer 2" scaling solution for general purpose "Layer 1" blockchains like Ethereum. Rollups networks separate execution of transactions from other aspects like consensus, processing transactions off of…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-04-01 Francisco Gomes Figueira , Martin Derka , Ching Lun Chiu , Jan Gorzny

Blockchain-based decentralised lending is a rapidly growing and evolving alternative to traditional lending, but it poses new risks. To mitigate these risks, lending protocols have integrated automated risk management tools into their smart…

Risk Management · Quantitative Finance 2025-10-02 Erum Iftikhar , Wei Wei , John Cartlidge

Rollup protocols have recently received significant attention as a promising class of Layer 2 (L2) scalability solutions. By utilizing the Layer 1 (L1) blockchain solely as a bulletin board for a summary of the executed transactions and…

Cryptography and Security · Computer Science 2025-10-02 Dominik Apel , Zeta Avarikioti , Matteo Maffei , Yuheng Wang

Blockchains have revolutionized decentralized applications, with composability enabling atomic, trustless interactions across smart contracts. However, layer 2 (L2) scalability solutions like rollups introduce fragmentation and hinder…

Cryptography and Security · Computer Science 2025-02-10 Ioannis Kaklamanis , Fan Zhang

Layer 1 (L1) blockchains such as Ethereum are secured under an "honest supermajority of stake" assumption for a large pool of validators who verify each and every transaction on it. This high security comes at a scalability cost which not…

Cryptography and Security · Computer Science 2024-07-25 Peiyao Sheng , Ranvir Rana , Senthil Bala , Himanshu Tyagi , Pramod Viswanath
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