UniPCH framework separates channel execution from private cross-chain payments
Original title: UniPCH: A Unified Framework for Cross-Chain Payments via Payment Channel Hubs
A Go prototype of UniPC plus selective re-signing blind conditional signatures is faster than comparable schemes under most tested delays.
Researchers present UniPCH, a two-layer framework for private cross-chain payments through payment channel hubs. The lower UniPC layer defines shared state transitions and security requirements, with realizations for UTXO ledgers and smart-contract account ledgers. The upper layer uses selective re-signing blind conditional signatures to coordinate channels in four phases. Analysis claims local UniPC security, griefing resistance, economic atomicity, and session unlinkability, and a prototype shows modest overhead from the common interfaces.
Unconfirmed: Security properties are the authors' analysis of their own protocol, not an independent audit.
- Existing hub protocols are hard to extend across heterogeneous blockchains.
- Task authorization is separated from confirmation of the full channel state.
- A full-refresh ablation finds reusing valid task evidence cuts account-ledger cost.
- Most evaluated configurations run faster than comparable schemes under network delay.
From the original article
1 min read at arxiv.orgPayment channel hubs (PCHs) enable private cross-chain payments, but existing protocols remain difficult to extend across heterogeneous blockchains. Their payment flows often depend on how particular blockchains represent transactions, authorize channel updates, and settle balances. Some protocols do not explain how their channels are implemented on actual blockchains.
By Yuanming Shao · arxiv.org
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