The Opentensor Foundation is rolling out three post-quantum signing algorithms for TAO transfers, staking, and validator operations, aiming to secure core network activity against future quantum threats. However, the upgrade has not yet reached mainnet.
What Bittensor Shipped
The foundation formally announced the feature on November 6, 2026. The code was merged into the release-487 development branch on October 27, 2026. As of the announcement, the latest runtime on mainnet was 486, meaning the feature is not yet active on the production network.
The update adds three new signing algorithms: ML-DSA-65, Falcon-512, and Falcon-1024. Each is designed to resist attacks that quantum computers could eventually mount against classical signature schemes. The options trade off speed and strength: ML-DSA-65 has a signing speed of approximately 0.521 ms, fast enough that users should not notice it, while Falcon-1024 offers security level 5, the highest of the three.
What It Covers, and What It Doesn’t Touch
The new signatures apply to TAO transfers, staking, validator weight-setting, and the use of both hotkeys and coldkeys. Hotkeys and coldkeys form Bittensor’s two-tier key system, with coldkeys typically guarding funds and hotkeys handling day-to-day network activity.
Notably, the upgrade does not change token economics. Supply, emissions, and rewards remain untouched. It is purely a security layer on top of existing mechanics.
Existing wallets also remain unchanged. Accounts using the classical Sr25519 and Ed25519 schemes are unaffected and do not require migration. No one is forced to move funds on a deadline.
For users seeking 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 aims to help legacy addresses maintain 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.
