Thunderdome: Timelock-Free Rationally-Secure Virtual Channels
Zeta Avarikioti
34th USENIX Security Symposium (USENIX Security '25) · Day 2 · Blockchain Security 2: Infrastructure, Protocol Design, and Governance
This talk introduces Thunderdome, a novel **virtual channel** protocol designed to enhance the scalability of **blockchain** platforms, specifically addressing the limitations of existing **Layer 2 protocols** like **payment channel networks**. Presented by Yuong Wang, a PhD student from TU Vienna, this work, a collaboration with Zeta Avarikioti and Y1, tackles the fundamental problem of blockchain scalability, exemplified by Ethereum's transaction throughput being significantly lower than centralized systems like Visa. While many solutions propose changes to the underlying Layer 1 blockchain, Thunderdome focuses on a Layer 2 approach, aiming to improve efficiency without requiring a hard fork.
AI review
Thunderdome is legitimate academic work published at USENIX Security — time-lock-free virtual channels with game-theoretic rational security is a real contribution, not marketing fluff. The protocol design is rigorous and the dual Byzantine/rational security analysis is the interesting bit. But this is a narrow-lane crypto/blockchain scalability paper, and the talk as described doesn't push far enough beyond the paper itself to make it a must-attend session.