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title: 'Post-Quantum Signature Aggregation with Falcon + LaBRADOR'
date: 2025-05-19
author: PSE Research
image: "/articles/post-quantum-signature-aggregation-with-falcon-and-LaBRADOR/cover.webp"
tagline: 'Compact lattice-based proofs for Ethereum'
description: 'Introducing our work on aggregating Falcon signatures using LaBRADOR, a lattice-based proof system optimized for Ethereum.'
canonical: 'https://ethresear.ch/t/lattice-based-signature-aggregation/22282'

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We demonstrate efficient aggregation of Falcon signatures using LaBRADOR, achieving compact, quantum-resistant proofs. Read the full technical breakdown on [ethresear.ch](https://ethresear.ch/t/lattice-based-signature-aggregation/22282).

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Ethereum currently uses BLS signatures, but these are vulnerable to future quantum attacks. Our recent research explores lattice-based signature aggregation using Falcon signatures and the LaBRADOR proof system.

Key highlights:

* **Compact proofs:** Aggregate 10,000 Falcon-512 signatures into a 74 KB proof.
* **Efficient generation:** Proofs generated in \~6 seconds on commodity hardware.
* **Verification optimization:** Current verification time (\~2.6 seconds) identified as a primary bottleneck, with active work to reduce it further.

This work is part of our broader post-quantum initiative at PSE, focusing on securing Ethereum's core infrastructure.

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🔗 **Full technical details and discussions:** [Lattice-based signature aggregation on ethresear.ch](https://ethresear.ch/t/lattice-based-signature-aggregation/22282)

