Blockstream on Nostr: Today, losing your hardware wallet is fine. Your recovery phrase gets you back in. In ...
Today, losing your hardware wallet is fine.
Your recovery phrase gets you back in. In a post-quantum signing setup, the device also holds state: a running count of how many times it has signed. That state matters for security.
SHRINCS is designed so that if the device is lost, the recovery phrase loads into a new one and falls back to a path that needs no state at all.
The fallback needs no state, so a lost device is never a lost wallet. More expensive to spend from, but always accessible. Blockstream Research Director Jonas Nick on building a post-quantum scheme that stays safe even when hardware fails:
https://blog.blockstream.com/op_checkshrincs-a-hash-based-signature-opcode-for-post-quantum-bitcoin/Published at
2026-07-15 05:21:33 CESTEvent JSON
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"pubkey": "922945779f93fd0b3759f1157e3d9fa20f3fd24c4b8f2bcf520cacf649af776d",
"created_at": 1784085693,
"kind": 1,
"tags": [
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"content": "Today, losing your hardware wallet is fine. \n\nYour recovery phrase gets you back in. In a post-quantum signing setup, the device also holds state: a running count of how many times it has signed. That state matters for security. \n\nSHRINCS is designed so that if the device is lost, the recovery phrase loads into a new one and falls back to a path that needs no state at all.\n\nThe fallback needs no state, so a lost device is never a lost wallet. More expensive to spend from, but always accessible. Blockstream Research Director Jonas Nick on building a post-quantum scheme that stays safe even when hardware fails: \n\nhttps://npub1yngh6qf9th6rmechf8fy93vdc6rgvpzm4mj97tql0pxs2kwlmthqdvhtgg.blossom.band/b747746cff789728e2b33e1a409c4b266fde56e1a58218c0ad571b900c92e815.gif\n\nhttps://blog.blockstream.com/op_checkshrincs-a-hash-based-signature-opcode-for-post-quantum-bitcoin/",
"sig": "af900fee7a6136ce90ea72f4069bb01fcb88520cfd33934f764a4590e4bf4228cdadb2529c8c18537b6977c7be261ab1dab4154ce89de3a1153d74b9a318980d"
}
