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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

There is an ongoing competition among blockchain technologies and the existence of one ultimate blockchain is impossible for many reasons. On the other hand, such variety can create difficulties in adoption, especially for the governments…

Cryptography and Security · Computer Science 2020-07-24 Oleksii Konashevych

Blockchain offers a decentralized, immutable, transparent system of records. It offers a peer-to-peer network of nodes with no centralised governing entity making it unhackable and therefore, more secure than the traditional paper-based or…

Cryptography and Security · Computer Science 2019-11-27 Harsh Jot Singh , Abdelhakim Senhaji Hafid

The rapid advancement of large language models (LLMs) demands increasingly reliable evaluation, yet current centralized evaluation suffers from opacity, overfitting, and hardware-induced variance. Our empirical analysis reveals an alarming…

Artificial Intelligence · Computer Science 2026-02-10 Yifan Yang , Jinjia Li , Kunxi Li , Puhao Zheng , Yuanyi Wang , Zheyan Qu , Yang Yu , Jianmin Wu , Ming Li , Hongxia Yang

Access to the system resources. The current access control systems face many problems, such as the presence of the third-party, inefficiency, and lack of privacy. These problems can be addressed by blockchain, the technology that received…

Cryptography and Security · Computer Science 2019-08-23 Sara Rouhani , Ralph Deters

As blockchain applications become increasingly widespread, there is a rising demand for on-chain data queries. However, existing schemes for on-chain data queries face a challenge between verifiability and efficiency. Queries on blockchain…

Cryptography and Security · Computer Science 2024-11-01 Meng Shen , Yuzhi Liu , Qinglin Zhao , Wei Wang , Wei Ou , Wenbao Han , Liehuang Zhu

Machine learning has recently enabled large advances in artificial intelligence, but these tend to be highly centralized. The large datasets required are generally proprietary; predictions are often sold on a per-query basis; and published…

Cryptography and Security · Computer Science 2019-07-18 Justin D. Harris , Bo Waggoner

Blockchain as a digital ledger for keeping records of digital transactions and other information, it is secure and decentralized technology. The globally growing number of digital population every day possesses a significant threat to…

Cryptography and Security · Computer Science 2023-11-03 Naresh Kshetri , James Hutson , Revathy G

The concept of blockchain has emerged as an effective solution for data-sensitive domains, such as healthcare, financial services, etc., due to its various attributes like immutability, non-repudiation, and availability. Thus,…

Distributed, Parallel, and Cluster Computing · Computer Science 2022-02-16 Shashank Joshi , Arhan Choudhury , Ojas Saraswat

Blockchain is challenging the status quo of the central trust infrastructure currently prevalent in the Internet towards a design principle that is underscored by decentralization, transparency, and trusted auditability. In ideal terms,…

Permissionless blockchains face considerable challenges due to increasing storage demands, driven by the proliferation of Decentralized Applications (DApps). This paper introduces EC-Chain, a cost-effective storage solution for…

Cryptography and Security · Computer Science 2024-12-10 Minghui Xu , Hechuan Guo , Ye Cheng , Chunchi Liu , Dongxiao Yu , Xiuzhen Cheng

Blockchain is a core technology to manage the value of cryptocurrencies, or to record trails of important business trades. The Smart Contract on blockchain is expected to improve security on blockchain system with automated operation, but…

Cryptography and Security · Computer Science 2020-01-07 Shingo Fujimoto , Yoshiki Higashikado , Takuma Takeuchi

Federated Learning (FL) is a well-known paradigm of distributed machine learning on mobile and IoT devices, which preserves data privacy and optimizes communication efficiency. To avoid the single point of failure problem in FL,…

Cryptography and Security · Computer Science 2024-03-13 Xiaoxue Zhang , Yifan Hua , Chen Qian

This paper addresses the critical challenge of ensuring healthcare policy compliance in the context of Electronic Health Records (EHRs). Despite stringent regulations like HIPAA, significant gaps in policy compliance often remain undetected…

Cryptography and Security · Computer Science 2023-12-19 Md Al Amin , Hemanth Tummala , Seshamalini Mohan , Indrajit Ray

Electronic Bill (E-Bill) is a rucial negotiable instrument in the form of data messages, relying on the Electronic Bill System (EB System). Blockchain technology offers inherent data sharing capabilities, so it is increasingly being adopted…

Cryptography and Security · Computer Science 2023-08-22 Hao Yang , Jie Fu , Zhili Cheng , Haifeng Qian

A significant body of research in decentralized federated learning focuses on combining the privacy-preserving properties of federated learning with the resilience and transparency offered by blockchain-based systems. While these approaches…

Cryptography and Security · Computer Science 2025-06-04 Gabriele Digregorio , Francesco Bleggi , Federico Caroli , Michele Carminati , Stefano Zanero , Stefano Longari

In this paper, we develop BlockMarkchain, as a secure data market place, where individual data sellers can exchange certified data with buyers, in a secure environment, without any mutual trust among the parties, and without trusting on a…

Cryptography and Security · Computer Science 2020-03-26 Hamidreza Ehteram , Mohammad Taha Toghani , Mohammad Ali Maddah-Ali

This research introduces the Blockchain Academic Credential Interoperability Protocol (BACIP), designed to significantly enhance the security, privacy, and interoperability of verifying academic credentials globally, addressing the…

Cryptography and Security · Computer Science 2024-06-25 Juan A. Berrios Moya

Blockchain has been increasingly used as a software component to enable decentralisation in software architecture for a variety of applications. Blockchain governance has received considerable attention to ensure the safe and appropriate…

Software Engineering · Computer Science 2022-03-29 Yue Liu , Qinghua Lu , Liming Zhu , Hye-Young Paik , Mark Staples

Blockchain is a decentralized, distributed ledger technology that ensures transparency, security, and immutability through cryptographic techniques. However, advancements in quantum computing threaten the security of classical cryptographic…

Cryptography and Security · Computer Science 2026-01-14 Nicholas J. C. Papadopoulos