Yinqian Zhang

CrossLine: Breaking "Security-by-Crash" based Memory Isolation in AMD SEV

2021

AMD's Secure Encrypted Virtualization (SEV) is an emerging security feature of modern AMD processors that allows virtual machines to run with encrypted memory and perform confidential computing even with an untrusted hypervisor. This paper first …

MECURY: Practical Cross-Chain Exchange via Trusted Hardware

2024 · arXiv (Cornell University)

The proliferation of blockchain-backed cryptocurrencies has sparked the need for cross-chain exchanges of diverse digital assets. Unfortunately, current exchanges suffer from high on-chain verification costs, weak threat models of central trusted parties, or synchronous requirements, …

Demystifying Private Transactions and Their Impact in PoW and PoS Ethereum

2025 · arXiv (Cornell University)

In Ethereum, private transactions, a specialized transaction type employed to evade public Peer-to-Peer (P2P) network broadcasting, remain largely unexplored, particularly in the context of the transition from Proof-of-Work (PoW) to Proof-of-Stake (PoS) consensus mechanisms. To …