4 papers
AgentValve: Sybil-Resilient Payment Authorization for Permissionless AI Markets
Jianting Zhang, Zhongtang Luo, Aniket Kate
AI agents increasingly select and pay service providers without human review. In emerging permissionless markets, however, adversaries can create inexpensive identities and fabrica…
Lifefin: Escaping Mempool Explosions in DAG-based BFT
Jianting Zhang, Sen Yang, Alberto Sonnino +2
Directed Acyclic Graph (DAG)-based Byzantine Fault-Tolerant (BFT) protocols have emerged as promising solutions for high-throughput blockchains. By decoupling data dissemination fr…
Five Minutes of DDoS Brings down Tor: DDoS Attacks on the Tor Directory Protocol and Mitigations
Zhongtang Luo, Jianting Zhang, Akshat Neerati +1
The Tor network offers network anonymity to its users by routing their traffic through a sequence of relays. A group of nine directory authorities maintains information about all a…
Optimistic, Signature-Free Reliable Broadcast and Its Applications
Nibesh Shrestha, Qianyu Yu, Aniket Kate +3
Reliable broadcast (RBC) is a key primitive in fault-tolerant distributed systems, and improving its efficiency can benefit a wide range of applications. This work focuses on signa…