# Lean Ethereum Reaches Devnet5 Interop

> Lean Ethereum has reached Devnet5 interop using leanVM to enable entire blocks to carry just one aggregated signature proof.

**Published by:** [ETH Daily](https://ethdaily.io/)
**Published on:** 2026-05-29
**Categories:** lean-ethereum, quantum-resistance, consensus, ethereum, zk, leanvm
**URL:** https://ethdaily.io/lean-ethereum-reaches-devnet5-interop

## Content

Lean Ethereum has reached Devnet5 interop, a major milestone in its effort to make Ethereum's consensus layer quantum-resistant. Ethereum currently uses BLS signatures, which are not post-quantum secure. Lean Ethereum is leveraging quantum-resistant hash-based signatures to address this. The goal is to achieve a PQ signature scheme ready for Ethereum mainnet. Devnet5 uses leanVM, a ZK-based aggregation layer, to enable entire blocks to carry just one aggregated signature proof instead of many individual signatures. Eight clients are participating in the devnets, with the Lean team progressively scaling validators and subnets to reach production-grade performance.Sponsored byETHConf lands in NYC June 8-10, bringing together 5,000+ attendees, 150+ speakers, and 100+ companies across Ethereum, stablecoins, and institutional adoption. Get your tickets at ethconf.com and use code ETHDAILY for 30% off General and 20% off VIP.Disclaimer: Content is for informational and educational purposes only and does not constitute financial, investment, legal, or other professional advice. No representations or warranties are made as to accuracy, completeness, or timeliness. Use of this content is at your own risk, and you should consult a qualified professional before making decisions. No fiduciary or advisory relationship is created

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