Explanipedia

Timestamp Manipulation: Timestamp-based Nakamoto-style Blockchains are Vulnerable Open

Junjie Hu, Sisi Duan · 2025

Nakamoto consensus are the most widely adopted decentralized consensus mechanism in cryptocurrency systems. Since it was proposed in 2008, many studies have focused on analyzing its security. Most of them focus on maximizing the profit of …

FigStep: Jailbreaking Large Vision-Language Models via Typographic Visual Prompts Open

Yichen Gong, Delong Ran, Jinyuan Liu, Conglei Wang, Tianshuo Cong , et al. · 2025

Large Vision-Language Models (LVLMs) signify a groundbreaking paradigm shift within the Artificial Intelligence (AI) community, extending beyond the capabilities of Large Language Models (LLMs) by assimilating additional modalities (e.g., …

PG: Byzantine Fault-Tolerant and Privacy-Preserving Sensor Fusion with Guaranteed Output Delivery Open

Chenglu Jin, Chao Yin, Marten van Dijk, Sisi Duan, Fabio Massacci , et al. · 2024

We design and implement PG, a Byzantine fault-tolerant and privacy-preserving multi-sensor fusion system. PG is flexible and extensible, supporting a variety of fusion algorithms and application scenarios. On the theoretical side, PG devel…

Asynchronous Consensus without Trusted Setup or Public-Key Cryptography Open

Sourav Das, Sisi Duan, S. Liu, Atsuki Momose, Ling Ren , et al. · 2024

Blockchain for digital healthcare: Case studies and adoption challenges Open

Zhou Fei, Yue Huang, Changqing Li, Xiaobin Feng, Wei Yin , et al. · 2024

Dashing and Star: Byzantine Fault Tolerance with Weak Certificates Open

Sisi Duan, Haibin Zhang, Xiao Sui, Baohan Huang, Chongyuan Mu , et al. · 2024

State-of-the-art Byzantine fault-tolerant (BFT) protocols assuming partial synchrony such as SBFT and HotStuff use regular certificates obtained from 2f + 1 (partial) signatures. We show that one can use weak certificates obtained from onl…

FigStep: Jailbreaking Large Vision-Language Models via Typographic Visual Prompts Open

Yichen Gong, Delong Ran, Jinyuan Liu, Conglei Wang, Tianshuo Cong , et al. · 2023

Large Vision-Language Models (LVLMs) signify a groundbreaking paradigm shift within the Artificial Intelligence (AI) community, extending beyond the capabilities of Large Language Models (LLMs) by assimilating additional modalities (e.g., …

Time-manipulation Attack: Breaking Fairness against Proof of Authority Aura Open

Xinrui Zhang, Rujia Li, Qin Wang, Qi Wang, Sisi Duan · 2023

As blockchain-based commercial projects and startups flourish, efficiency becomes one of the critical metrics in designing blockchain systems. Due to its high efficiency, Proof of Authority (PoA) Aura has become one of the most widely adop…

PACE Open

Bin Zhang, Sisi Duan · 2022

The classic asynchronous Byzantine fault tolerance (BFT) framework of Ben-Or, Kemler, and Rabin (BKR) and its descendants rely on reliable broadcast (RBC) and asynchronous binary agreement (ABA). However, BKR does not allow all ABA instanc…

Recent progress on BFT in the era of blockchains Open

Sisi Duan, Bin Zhang · 2022

This perspective highlights some recent progress on the research of Byzantine fault tolerant (BFT) consensus protocol in the era of blockchains, including both partially synchronous BFT and asynchronous BFT protocols, their fundamental bui…

BFT in Blockchains: From Protocols to Use Cases Open

Xin Wang, Sisi Duan, James R. Clavin, Haibin Zhang · 2021

A blockchain is a distributed system that achieves strong security guarantees in storing, managing, and processing data. All blockchains achieve a common goal: building a decentralized system that provides a trustworthy service in an untru…

A Framework for Evaluating BFT Open

James R. Clavin, Huang Yue, Xin Wang, Pradeep M. Prakash, Sisi Duan , et al. · 2021

We present a framework for evaluating the performance of Byzantine fault-tolerant (BFT) protocols theoretically. Our motivation is to identify protocols suitable for a particular power grid application. In this application, replicas are lo…

MiB: Asynchronous BFT with More Replicas Open

Chao Liu, Sisi Duan, Haibin Zhang · 2021

State-of-the-art asynchronous Byzantine fault-tolerant (BFT) protocols, such as HoneyBadgerBFT, BEAT, and Dumbo, have shown a performance comparable to partially synchronous BFT protocols. This paper studies two practical directions in asy…

Blockchains for Government Open

James R. Clavin, Sisi Duan, Haibin Zhang, Vandana P. Janeja, Karuna Pande Joshi , et al. · 2020

Blockchain is the technology used by developers of cryptocurrencies, like Bitcoin, to enable exchange of financial “coins” between participants in the absence of a trusted third party to ensure the transaction, such as is typically done by…

Demo Abstract: ByzGame, a Visualized and Understandable BFT Consensus Open

James R. Clavin, Sisi Duan · 2019

Byzantine Fault Tolerance (BFT) is the only generic technique that tolerates arbitrary failures in distributed systems, and can be used as a core primitive in building consensus in blockchains. Numerous BFT protocols have been proposed to …

Revisiting hBFT: Speculative Byzantine Fault Tolerance with Minimum Cost Open

Nibesh Shrestha, Mohan Kumar, Sisi Duan · 2019

FaB Paxos sets a lower bound of 5f + 1 replicas for any two-step consensus protocols tolerating f byzantine failures. Yet, hBFT promises a two-step consensus protocol with only 3f + 1 replicas. As a result, it violates safety property of a…

Revisiting hBFT: Speculative Byzantine Fault Tolerance with Minimum Cost Open

Nibesh Shrestha, Mohan Kumar, Sisi Duan · 2019

FaB Paxos[5] sets a lower bound of 5f + 1 replicas for any two-step consensus protocols tolerating f byzantine failures. Yet, hBFT[3] promises a two-step consensus protocol with only 3f + 1 replicas. As a result, it violates safety propert…

Best effort broadcast under cascading failures in interdependent critical infrastructure networks Open

Sisi Duan, Sangkeun Lee, Supriya Chinthavali, Mallikarjun Shankar · 2017

HotSpots Open

Liangzhe Chen, Xinfeng Xu, Sangkeun Lee, Sisi Duan, Alfonso G. Tarditi , et al. · 2017

Critical Infrastructure Systems such as transportation, water and power grid systems are vital to our national security, economy, and public safety. Recent events, like the 2012 hurricane Sandy, show how the interdependencies among differe…

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