Ethereum’s Fast Confirmation Rule aims to cut L1 deposit times to ~13 seconds by using attestations instead of block depth, with no hard fork required.

TL;DR: The Fast Confirmation Rule (FCR) is a new upgrade for Ethereum that reduces deposit/bridge confirmation times from minutes (~13 mins) to ~13 seconds by using validator attestations instead of waiting for full finality. It significantly improves UX for L2s, exchanges, and bridges by speeding up transfers and reducing locked capital, while still maintaining strong security under assumptions like network synchrony and <25% malicious stake. If those assumptions fail, FCR safely falls back to slower confirmation or full finality. Overall, it’s a major efficiency upgrade that could become the new standard for faster, secure Ethereum transactions without requiring a hard fork.

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More coverage

• FCR — Fast Confirmation Rule for Ethereum | Single-Slot Confirmation (fastconfirm.it)
• A Fast Confirmation Rule (aka Fast Synchronous Finality) for ... - arXiv (arxiv.org)
• Fast Confirmation Rule on Safe Head in Prysm - Ethereum Research (ethresear.ch)
• The Fast Confirmation Rule will bring in a 98% improvement in ... (x.com)
• Ethereum's Fast Confirmation Rule targets 13-second bridge times ... (thedefiant.io)

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