PQS-BFL: a Post-Quantum Secure Blockchain-Based Federated Learning Framework

Federated Learning FL enables collaborative model training while preserving data privacy, but its classical cryptographic underpinnings are vulnerable to quantum attacks. This vulnerability is particularly critical in sensitive domains like healthcare. This paper introduces PQS-BFL Post-Quantum...

Decentralized Vulnerability Disclosure Via Permissioned Blockchain: a Secure, Transparent Alternative to Centralized CVE Management

This paper proposes a decentralized, blockchain-based system for the publication of Common Vulnerabilities and Exposures CVEs, aiming to mitigate the limitations of the current centralized model primarily overseen by MITRE. The proposed architecture leverages a permissioned blockchain, wherein on...

A Comprehensive Study of Exploitable Patterns in Smart Contracts: from Vulnerability to Defense

With the rapid advancement of blockchain technology, smart contracts have enabled the implementation of increasingly complex functionalities. However, ensuring the security of smart contracts remains a persistent challenge across the stages of development, compilation, and execution...

Building Trust in Healthcare with Privacy Techniques: Blockchain in the Cloud

This study introduces a cutting-edge architecture developed for the NewbornTime project, which uses advanced AI to analyze video data at birth and during newborn resuscitation, with the aim of improving newborn care. The proposed architecture addresses the crucial issues of patient consent, data...

SoK: a Survey of Mixing Techniques and Mixers for Cryptocurrencies

Blockchain technologies have overturned the digital finance industry by introducing a decentralized pseudonymous means of monetary transfer. The pseudonymous nature introduced privacy concerns, enabling various deanonymization techniques, which in turn spurred development of stronger...

Proof of Useful Intelligence (PoUI): Blockchain Consensus beyond Energy Waste

Blockchain technology enables secure, transparent data management in decentralized systems, supporting applications from cryptocurrencies like Bitcoin to tokenizing real-world assets like property. Its scalability and sustainability hinge on consensus mechanisms balancing security and efficiency...

Mining Characteristics of Vulnerable Smart Contracts across Lifecycle Stages

Smart contracts are the cornerstone of decentralized applications and financial protocols, which extend the application of digital currency transactions. The applications and financial protocols introduce significant security challenges, resulting in substantial economic losses. Existing solution...

Malicious Code Detection in Smart Contracts Via Opcode Vectorization

With the booming development of blockchain technology, smart contracts have been widely used in finance, supply chain, Internet of things and other fields in recent years. However, the security problems of smart contracts become increasingly prominent. Security events caused by smart contracts...

Clustering and Analysis of User Behaviour in Blockchain: a Case Study of Planet IX

Decentralised applications dApps that run on public blockchains have the benefit of trustworthiness and transparency as every activity that happens on the blockchain can be publicly traced through the transaction data. However, this introduces a potential privacy problem as this data can be track...

Blockchain Application in Metaverse: a Review

In recent years, the term Metaverse emerged as one of the most compelling concepts, captivating the interest of international companies such as Tencent, ByteDance, Microsoft, and Facebook. These company recognized the Metaverse as a pivotal element for future success and have since made significa...

U.S. Treasury Lifts Tornado Cash Sanctions Amid North Korea Money Laundering Probe

The U.S. Treasury Department has announced that it's removing sanctions against Tornado Cash, a cryptocurrency mixer service that has been accused of aiding the North Korea-linked Lazarus Group to launder their ill-gotten proceeds. "Based on the Administration's review of the novel legal and poli...

[SECURITY] Fedora 40 Update: vyper-0.4.1-1.fc40

Pythonic Smart Contract Language for the EVM...

GO-2025-3448 Malicious smart contract can crash the chain in github.com/CosmWasm/wasmvm

Malicious smart contract can crash the chain in github.com/CosmWasm/wasmvm...

GHSA-23QP-3C2M-XX6W wasmvm: Malicious smart contract can crash the chain

CWA-2025-001 Severity Medium Moderate + Likely^1 Affected versions: - wasmvm = 2.2.0, = 2.1.0, = 2.0.0, 2.0.6 - wasmvm 1.5.8 Patched versions: - wasmvm 1.5.8, 2.0.6, 2.1.5, 2.2.2 Description of the bug The vulnerability can be used to crash the chain. The underlying bug that causes this is presen...

wasmvm: Malicious smart contract can slow down block production

CWA-2025-002 Severity Medium Moderate + Likely^1 Affected versions: - wasmvm = 2.2.0, = 2.1.0, = 2.0.0, 2.0.6 - wasmvm 1.5.8 Patched versions: - wasmvm 1.5.8, 2.0.6, 2.1.5, 2.2.2 Description of the bug The vulnerability can be used to slow down block production. The attack requires a malicious...

CVE-2025-21607 Success of Certain Precompile Calls not Checked in Vyper

Vyper is a Pythonic Smart Contract Language for the EVM. When the Vyper Compiler uses the precompiles EcRecover 0x1 and Identity 0x4, the success flag of the call is not checked. As a consequence an attacker can provide a specific amount of gas to make these calls fail but let the overall executi...

Why Ethereum Will Be a Key Platform for Businesses in the Future

Explore how Ethereum revolutionizes industries with smart contracts, DeFi, NFTs, gaming, DAOs, and sustainability, shaping the future of…...

The Role of Blockchain and Smart Contracts in Securing Digital Transactions

Learn how blockchain and smart contracts improve cybersecurity factors in online transactions, remove the element of fraud, and…...

Top 5 Platforms for Identifying Smart Contract Vulnerabilities

How well do you know your smart contracts’ health? This article highlights the top five platforms that DeFi…...

Malware Campaign Uses Ethereum Smart Contracts to Control npm Typosquat Packages

An ongoing campaign is targeting npm developers with hundreds of typosquat versions of their legitimate counterparts in an attempt to trick them into running cross-platform malware. The attack is notable for utilizing Ethereum smart contracts for command-and-control C2 server address distribution...