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There is also a bip360 signet here:
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Here is a lost of things Block stream has been working on re quantum:
- @real_or_random proved post-quantum security of the Taproot commitment scheme (https://eprint.iacr.org/2025/1307.pdf), which is essential for a Taproot-based upgrade path (https://groups.google.com/g/bitcoindev/c/8O857bRSVV8/m/4cM-7pf4AgAJ)
- @real_or_random discovered in 2018 that commit-reveal schemes (first discovered by @adam3us) could be applied to obtain post-quantum security (https://bitcoinops.org/en/newsletters/2025/04/04/#securely-proving-utxo-ownership-by-revealing-a-sha256-preimage). This is still the most compact signature scheme but it has other downsides. Variants appear from time to time on the ML.
- Reviewed an earlier version of BIP 360, reported three vulnerabilities (https://groups.google.com/g/bitcoindev/c/oQKezDOc4us/m/I6tmPaA2AgAJ).
- SHRINCS: 324-byte stateful post-quantum signatures with static backups (https://delvingbitcoin.org/t/shrincs-324-byte-stateful-post-quantum-signatures-with-static-backups/2158/3)
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@cryptoquick (Hunter Beast, one of the authors of BIP 360) apparently anticipated Saylor and Carter's fervor and released yesterday updates to BIP 360:
https://github.com/cryptoquick/bips/blob/56be885cc9ba67b047e257df6692ab0c4290b294/bip-0360.mediawiki