Stacks Labs says it completed the first post-quantum sBTC transfer on the Stacks mainnet, rather than in a test environment. The transaction involved sBTC, a token designed to track bitcoin at a 1:1 ratio so that its value can be used in decentralized finance applications without selling the underlying BTC. By the third quarter of 2026, sBTC supply had reached approximately 2,487 BTC, while the permissioned signer group had expanded beyond its initial 15 institutional operators to include companies such as Ankr and HashKey Cloud. The achievement remains an isolated proof of concept, as Stacks Labs has not disclosed the signature scheme used, how it interacts with the sBTC signer set, whether ordinary users can access it or how it will scale. Post-quantum protection applies to the transfer layer, while bitcoin and Stacks’ underlying settlement chain continue to rely on current cryptography.
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