Horcrux: Synthesize, Split, Shift and Stay Alive; Preventing Channel Depletion via Universal and Enhanced Multi-hop Payments
Anqi Tian
Network and Distributed System Security (NDSS) Symposium 2025 · Day 3 · Blockchain Security 2
This article delves into "Horcrux," a groundbreaking protocol presented at the NDSS Symposium, designed to fundamentally address the persistent problem of fund depletion in **payment channel networks (PCNs)**. Presented by Anqi Tian, this work offers a novel approach to enhance the scalability and reliability of blockchain-based payment systems, particularly those relying on off-chain channels like the Lightning Network. The core innovation of Horcrux lies in its ability to synthesize, split, and shift funds within multi-hop payments, ensuring channels remain balanced and operational, thereby preventing the significant performance degradation and service interruptions caused by depleted channels.
AI review
Horcrux is legitimate academic cryptography/systems work on a real and underappreciated problem in payment channel networks. The flow-neutrality framing, time-sliced online requirements, and domino-attack resistance are genuine technical contributions. But this is a conference proceedings presentation, not a security research talk in the traditional offensive/defensive sense — and the write-up reads like an AI-generated summary of the paper rather than a firsthand account of the talk.