Ethereum Layer 2 Aztec launches Tierra V6 upgrade to fix security issues and speed up private transactions

Aztec Foundation launches Tierra V6 to upgrade its private network

The Aztec Foundation has rolled out Tierra V6, the latest major upgrade to Aztec, a privacy-focused Ethereum Layer 2 network. A Layer 2 network is a secondary system built on top of a main blockchain like Ethereum, designed to handle transactions faster and at lower cost.

The upgrade fixes a critical security problem found in version 5 and makes private transaction proofs about twice as fast. Aztec also launched a new brand and website as it pushes to become a leading platform for private apps.

What the upgrade changes

• Tierra V6 resolves vulnerabilities in earlier versions, including a critical issue in V5.


• Private transaction proof generation now takes about one second on a native device, up from roughly two seconds before.


• Messages from Ethereum can reach Aztec in as little as 12 seconds, compared with an average of two minutes previously.


• The foundation added a new AI-based system for security testing.

Why the critical fix took time

When asked why the critical issue in V5 had not been fixed sooner, an Aztec spokesperson said the network is decentralized. In a decentralized network, there is no single owner who can force an update. So the whole network had to move to the new version to apply the fix.

The spokesperson said Aztec has no central operator that could change anything on its own. However, the team said it plans to make future upgrades faster if new vulnerabilities are discovered.

What is known about the network's design

Aztec said its network runs on more than 3,000 validators, has no centralized sequencer, and uses no privileged viewing keys. A sequencer is a component that orders transactions before they are recorded, while viewing keys let certain parties look inside private transactions. The foundation says none of these give any single party special control.

Developers can choose what stays private

Apps built on Aztec can decide which parts are private and which are public. Private functions run and create proofs on the user's own device, while public functions run on the network.

Zac Williamson, co-founder and CEO of the Aztec Foundation, said in a statement that privacy should be built into the network by default, not something users have to request or trust someone else to protect.

Private apps preparing to launch

The upgrade follows the relaunch of zk.money, a self-custodial wallet for private crypto payments, by Aztec Labs. The original product had been discontinued three years earlier. Joe Andrews, co-founder and CEO of Aztec Labs, said users will be able to deposit directly from any Ethereum wallet and make fast private transactions without complicated bridging workflows. A wallet is an app or device that stores the credentials needed to access crypto assets.

Other applications launching or preparing to launch include:

• Galactica, for private artificial intelligence inference


• Nemi, for private perpetuals trading


• Nulo, a private browser wallet


• Xochi, supporting private intents and trading


• Nyx, for private payments to any Ethereum wallet


• Olla, offering liquid staking for the Aztec token


• Rolling Chat, a private message board based on experiments from Ethereum co-founder Vitalik Buterin

Aztec also introduced a new brand and website alongside the Tierra upgrade, describing its goal as becoming the platform for "unstoppable private apps."

What is still unclear

The announcement does not say exactly when most of the listed applications will launch, and it does not provide details of the specific V5 vulnerability or proof of independent review. The timeline for faster future upgrades if new vulnerabilities are found is also not specified.

Sources

• The Block