Stacks Labs reported that it successfully carried out the first sBTC transfer secured by post-quantum cryptography directly on the Stacks mainnet. The operation consisted of withdrawing funds from a test vault in Clarity smart contracts, validating the transaction using a hash-based Lamport one-time signature scheme.
How Stacks engineers moved sBTC with a post-quantum signature, without a protocol upgrade:
Bitcoin and Stacks use elliptic-curve signatures, which a powerful enough quantum computer could break to forge transactions. Hash-based signatures are designed to resist that. pic.twitter.com/PhBSMIdRWq
— stacks.btc (@Stacks) November 11, 2026
This is a significant technical milestone against the future threat of quantum computing on traditional elliptic curve cryptographic algorithms. Although this is a limited proof of concept that does not yet modify standard sBTC wallets or the Bitcoin base layer, it demonstrates Stacks’ operational capability to verify quantum-resistant primitives in production environments.
The next step for the Stacks ecosystem will be to scale these signatures into reusable schemes aligned with NIST standards, within its technical roadmap toward 2030.
Source: https://x.com/Stacks/status/2120585238816690423
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