Bittensor adds quantum-resistant wallet support with new digital signatures

Bittensor is preparing its wallets for a threat that doesn’t fully exist yet. The network has introduced native support for post-quantum digital signatures on its Subtensor blockchain.

The goal is to keep core activity, including TAO transfers, staking and validator work, secure if quantum computers eventually crack today’s cryptography.

What Bittensor actually shipped

The Opentensor Foundation formally announced the feature on November 6, 2026. The code itself was merged into the release-487 development branch on October 27, 2026.

There is a catch for anyone hoping to use it today. As of the announcement, the latest runtime reported on mainnet was 486, so the feature was not yet live on the production network.

The update adds three new signing algorithms: ML-DSA-65, Falcon-512 and Falcon-1024. Each is designed to resist the kinds of attacks that quantum machines could one day mount against classical signature schemes.

The three options trade off speed and strength. ML-DSA-65 has a signing speed of approximately 0.521 ms, which is fast enough that users shouldn’t notice it. Falcon-1024 sits at the top of the range, offering security level 5, the highest of the three.

What it covers, and what it doesn’t touch

The new signatures apply to the operations that matter most on Bittensor. That list includes TAO transfers, staking, validator weight-setting and the use of both hotkeys and coldkeys.

Hotkeys and coldkeys are Bittensor’s two-tier key system. Coldkeys typically guard funds, while hotkeys handle day-to-day network activity.

Notably, the upgrade does not change token economics. Supply, emissions and rewards are untouched. This is purely a security layer on top of existing mechanics.

Existing wallets also stay exactly as they are. Accounts using the classical Sr25519 and Ed25519 schemes are unaffected and do not require migration. Nobody is being forced to move funds on a deadline.

For users who want extra protection, there is an optional automatic signing-key rotation feature. Enabling it requires a one-time registration lock of 0.2 TAO. According to the research findings, the feature is aimed at helping legacy addresses maintain their operational integrity while adopting the newer cryptography.

What this means for TAO holders and validators

For now, the practical impact is close to zero. The feature lives in a development branch, and mainnet was still running runtime 486 when it was announced. Holders should watch for the release-487 runtime upgrade to actually go live before treating the protection as active.

Once it does, large holders and validators managing significant stake are the obvious early candidates. A 0.2 TAO lock for automatic key rotation is a modest cost relative to the value many of them secure.