Trezor to prioritize stateless signatures for post-quantum Bitcoin security

Trezor is preparing to address the unique security and user experience challenges that could emerge with a post-quantum Bitcoin , as highlighted by CTO Tomáš Sušánka. As the Bitcoin community considers SHRINCS—a leading candidate for quantum-resistant signatures—wallet manufacturers face critical decisions around how to implement these changing cryptographic standards. SHRINCS, proposed by Blockstream Research Director Jonas Nick and cryptographer Mikhail Kudinov, introduces a composite hash-based signature system. It allows users to choose between large, reusable “stateless” signatures and smaller, highly efficient “stateful” signatures. The latter are appealing for efficiency but bring significant security risks if reused beyond their prescribed signature budget. With stateful signatures, users must monitor a strict signing limit.

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