a16z's Aerie Speeds Up Post-Quantum Signatures as Ethereum Devs Meet

a16z crypto published research on October 16, 2026 introducing a system it calls Aerie, which aggregates lattice-based signatures using lattice-based SNARKs — a construction the firm presents as a faster path to post-quantum signature aggregation than prior approaches.

Separately, Ethereum's post-quantum transaction signature (PQTS) working group has scheduled its seventeenth breakout call for Wednesday, October 28, 2026 at 14:00 UTC, according to a GitHub-linked meeting notice posted on the Ethereum Magicians forum on October 23, 2026. The posted agenda lists two presenters: Tom Wambsgans, referencing a resource at sphincs.art, and Matteo Vena, speaking on SPHINCS parameters.

Why signature aggregation matters for post-quantum Ethereum

Ethereum's validator set signs enormous volumes of attestations every epoch, and today's aggregation relies on BLS signatures, a scheme vulnerable to a sufficiently capable quantum computer. The Ethereum Magicians PQTS working group exists specifically to evaluate replacement signature schemes that would hold up against that threat while keeping transaction and attestation overhead manageable at Ethereum's scale.

SPHINCS+ — the subject of Matteo Vena's planned presentation — is one of the hash-based signature schemes standardized by NIST as quantum-resistant, but it produces signatures far larger than BLS, which creates a real bandwidth and storage problem if adopted network-wide without a compression layer. a16z crypto's Aerie research targets exactly that kind of problem: compressing many post-quantum signatures into a single lattice-based SNARK proof, intended to cut the aggregate verification cost that a naive post-quantum signature scheme would otherwise impose.

a16z crypto's publication and the PQTS group's scheduled call are not directly linked in either primary source — the a16z post does not reference the Ethereum Magicians thread, and the October 23 meeting notice does not mention Aerie. Both materials, however, sit inside the same narrow research problem: how a blockchain that currently depends on BLS aggregation migrates to quantum-resistant signatures without breaking the performance assumptions validators rely on today.

What to watch next

The October 28 breakout call is a working-group meeting, not a specification vote; its outputs, if any, will surface through the linked GitHub issue referenced in the forum post rather than through an on-chain change. No Ethereum core developer call or Ethereum Foundation blog post has yet referenced Aerie as of this writing, so whether the aggregation scheme a16z crypto describes becomes part of the PQTS group's evaluated options remains an open question tied to the working group's own documented process rather than to this research release. Readers tracking Ethereum's technical roadmap should watch the GitHub issue linked from the October 23 forum post for whether Vena's SPHINCS parameter discussion or Wambsgans' presentation references aggregation approaches like the one a16z crypto published.