Aztec Ships “Tierra” Upgrade, Closing V5 Test Hole

Aztec deployed Aztec landthe sixth alpha release of its L2 privacy on Ethereum, alongside a new brand and a range of private applications. The upgrade fixes the critical proof system flaw revealed by the team in August and roughly doubles the speed of client-side proofs.

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• The fix: On August 7, Aztec revealed that an attacker could potentially forge a proof that the V5 network would accept for a transaction that it should have rejected. Since rollup contracts are immutable, the only remedy was to ship a completely new rollup, which is what V6 is. Aztec says it has also formally verified essential elements of the proof system and added an AI-based safety testing harness.

• Everything is faster: Private proofs now take around 1 second on native hardware, according to Aztec, compared to around 2.5 seconds for a token transfer on V5. Ethereum deposits, which previously took an average of two minutes to land, now arrive in approximately 12 to 30 seconds thanks to a reworked inbox.

• The wave of applications: Aztec Labs has relaunched zk.money, its private payments product, three years after shutting down the original. Also present are Galactica’s private inference (payment for GPT, Claude and open models from a private balance), Nemi (a private DEX, currently waitlisted only), Xochi (private intentions), Nulo wallet and Olla liquid staking for AZTEC.

• Already canonical: The channel actually upgraded to V6 on October 26 after a vote by token holders; today is the public launch and rebranding. V5 remains funded for approximately 30 days so latecomers can migrate.