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Decentralized financial platforms rely heavily on Web of Trust reputation systems to mitigate counterparty risk in the absence of centralized identity verification. However, these pseudonymous networks are inherently vulnerable to…

密码学与安全 · 计算机科学 2026-03-17 Chang Xue , Fang Liu , Jiaye Wang , Jinming Xing , Chen Yang

A cryptocurrency is a decentralized digital currency that is designed for secure and private asset transfer and storage. As a currency, it should be difficult to counterfeit and double-spend. In this paper, we review and analyze the major…

密码学与安全 · 计算机科学 2019-04-26 Ehab Zaghloul , Tongtong Li , Matt Mutka , Jian Ren

This paper investigates whether Bittensor can be considered the Bitcoin of decentralized Artificial Intelligence by directly comparing its tokenomics, decentralization properties, consensus mechanism, and incentive structure against those…

密码学与安全 · 计算机科学 2025-07-08 Elizabeth Lui , Jiahao Sun

Many graph mining and analysis services have been deployed on the cloud, which can alleviate users from the burden of implementing and maintaining graph algorithms. However, putting graph analytics on the cloud can invade users' privacy. To…

密码学与安全 · 计算机科学 2015-03-19 Pengtao Xie , Eric Xing

Ransomware can prevent a user from accessing a device and its files until a ransom is paid to the attacker, most frequently in Bitcoin. With over 500 known ransomware families, it has become one of the dominant cybercrime threats for law…

密码学与安全 · 计算机科学 2018-04-12 Masarah Paquet-Clouston , Bernhard Haslhofer , Benoit Dupont

Bitcoin and many other similar Cryptocurrencies have been in existence for over a decade, prominently focusing on decentralized, pseudo-anonymous ledger-based transactions. Many protocol improvements and changes have resulted in new…

密码学与安全 · 计算机科学 2024-09-10 Chaitanya Rahalkar , Anushka Virgaonkar

Bitcoin has become the leading cryptocurrency system, but the limit on its transaction processing capacity has resulted in increased transaction fees and delayed transaction confirmation. As such, it is pertinent to understand and probably…

密码学与安全 · 计算机科学 2021-06-21 Befekadu G. Gebraselase , Bjarne E. Helvik , Yuming Jiang

Cryptocurrencies such as Bitcoin are realized using distributed systems and hence critically rely on the performance and security of the interconnecting network. The requirements on these networks and their usage, however can differ…

网络与互联网体系结构 · 计算机科学 2020-08-20 Maya Dotan , Yvonne-Anne Pignolet , Stefan Schmid , Saar Tochner , Aviv Zohar

Security is one of the fundamental challenges in the Internet of Things (IoT) due to the heterogeneity and resource constraints of the IoT devices. Device classification methods are employed to enhance the security of IoT by detecting…

密码学与安全 · 计算机科学 2019-03-15 Ali Dorri , Clemence Roulin , Raja Jurdak , Salil Kanhere

Cryptocurrencies gain trust in users by publicly disclosing the full creation and transaction history. In return, the transaction history faithfully records the whole spectrum of cryptocurrency user behaviors. This article analyzes and…

密码学与安全 · 计算机科学 2020-10-05 Xiao Fan Liu , Xin-Jian Jiang , Si-Hao Liu , Chi Kong Tse

Cryptocurrency systems can be subject to deanonimization attacks by exploiting the network-level communication on their peer-to-peer network. Adversaries who control a set of colluding node(s) within the peer-to-peer network can observe…

密码学与安全 · 计算机科学 2022-11-08 Piyush Kumar Sharma , Devashish Gosain , Claudia Diaz

This paper reviews the applications of Graph Neural Networks (GNNs), Graph Convolutional Networks (GCNs), and Convolutional Neural Networks (CNNs) in blockchain technology. As the complexity and adoption of blockchain networks continue to…

机器学习 · 计算机科学 2024-10-02 Amy Ancelotti , Claudia Liason

Anomaly detection tools play a role of paramount importance in protecting networks and systems from unforeseen attacks, usually by automatically recognizing and filtering out anomalous activities. Over the years, different approaches have…

密码学与安全 · 计算机科学 2020-07-06 Matteo Signorini , Matteo Pontecorvi , Wael Kanoun , Roberto Di Pietro

Anonymous social networks present a number of new and challenging problems for existing Social Network Analysis techniques. Traditionally, existing methods for analysing graph structure, such as community detection, required global…

数据结构与算法 · 计算机科学 2021-06-22 Alvaro Garcia-Recuero

Bitcoin is a decentralised digital currency that serves as an alternative to existing transaction systems based on an external central authority for security. Although Bitcoin has many desirable properties, one of its fundamental…

密码学与安全 · 计算机科学 2019-10-07 Georgios Birmpas , Elias Koutsoupias , Philip Lazos , Francisco J. Marmolejo-Cossío

Blockchain technology is ushering in another break-out year, the challenge of blockchain still remains to be solved. This paper analyzes the features of Bitcoin and Bitcoin-NG system based on blockchain, proposes an improved method of…

密码学与安全 · 计算机科学 2018-11-01 Jia Kan , Shangzhe Chen , Xin Huang

Cryptocurrency blockchains, beyond their primary role as distributed payment systems, are increasingly used to store and share arbitrary content, such as text messages and files. Although often non-financial, this hidden content can impact…

机器学习 · 计算机科学 2025-04-21 Charalampos Kleitsikas , Nikolaos Korfiatis , Stefanos Leonardos , Carmine Ventre

Recent work has demonstrated significant anonymity vulnerabilities in Bitcoin's networking stack. In particular, the current mechanism for broadcasting Bitcoin transactions allows third-party observers to link transactions to the IP…

Graph neural networks (GNNs) are designed to use attributed graphs to learn representations. Such representations are beneficial in the unsupervised learning of clusters and community detection. Nonetheless, such inference may reveal…

机器学习 · 计算机科学 2026-02-13 Dalyapraz Manatova , Pablo Moriano , L. Jean Camp

The increasing incidence of IoT-based botnet attacks has driven interest in advanced learning models for detection. Recent efforts have focused on leveraging attention mechanisms to model long-range feature dependencies and Graph Neural…

网络与互联网体系结构 · 计算机科学 2026-03-10 Hassan Wasswa , Hussein Abbass , Timothy Lynar