Zhong Chen

The Scale-free Network of Passwords : Visualization and Estimation of Empirical Passwords

2015 · arXiv (Cornell University)

In this paper, we present a novel vision of large scale of empirical password sets available and improve the understanding of passwords by revealing their interconnections and considering the security on a level of the …

Making Tagging Systems Resistant to Tricky Spam Attacks

2015

Tagging systems are known vulnerable to tag spam. While there have been efforts aiming at addressing this problem, tricky spam attackers could exploit and leverage vulnerabilities within them to invalidate these seemingly robust efforts. Rather …

Semantic Neuron Networks Based Associative Memory Model

2017

In our previous work, Hopfield weight matrices were used as the primary inputs to learn associations among concepts or objects in different learning tasks. One of the challenging problems, however, was how to endow the …

BB-PKI: Blockchain-Based Public Key Infrastructure Certificate Management

2020

Recently, real-world attacks against the web Public Key Infrastructure (PKI) have arisen more frequently. The current PKI that use Registration Authorities/Certificate Authorities (RAs/CAs) model suffer from notorious security vulnerabilities. Most of these vulnerabilities are due …

ChainDB: Ensuring Integrity of Querying Off-Chain Data on Blockchain

2022

Enterprise blockchain applications have been widely adopted and the data scale on blockchain increases rapidly in recent years. In practical application, participants prefer to store most of the business data in local database systems and …

Online Semi-supervised Learning with Mix-Typed Streaming Features

2023 · Proceedings of the AAAI Conference on Artificial Intelligence

Online learning with feature spaces that are not fixed but can vary over time renders a seemingly flexible learning paradigm thus has drawn much attention. Unfortunately, two restrictions prohibit a ubiquitous application of this learning …

Three-dimensional visualization of thyroid ultrasound images based on multi-scale features fusion and hierarchical attention

2024 · BioMedical Engineering OnLine

BACKGROUND: Ultrasound three-dimensional visualization, a cutting-edge technology in medical imaging, enhances diagnostic accuracy by providing a more comprehensive and readable portrayal of anatomical structures compared to traditional two-dimensional ultrasound. Crucial to this visualization is the …

Demystifying and Detecting Cryptographic Defects in Ethereum Smart Contracts

2025

Ethereum has officially provided a set of system-level cryptographic APIs to enhance smart contracts with cryptographic capabilities. These APIs have been utilized in over 10% of Ethereum transactions, motivating developers to implement various on-chain cryptographic …