If you re-use a nonce for two different signatures with the same key, it leaks the key.
Imagine a UTXO is encumbered with a script that says “you have to use 7” as the nonce.
If you can spend that UTXO and you sign more than one transaction spending it, you leak your private key.
Lots of interesting applications (especially in multi party settings) where you can make it costly for someone to sign two conflicting transactions
rot13maxi / Rijndael
npub1mx…u0htc
2024-06-27 01:48:00
in reply to nevent1q…ermv
Author Public Key
npub1mxrssnzg8y9zjr6a9g6xqwhxfa23xlvmftluakxqatsrp6ez9gjssu0htcPublished at
2024-06-27 01:48:00Event JSON
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"pubkey": "d987084c48390a290f5d2a34603ae64f55137d9b4affced8c0eae030eb222a25",
"created_at": 1719452880,
"kind": 1,
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"content": "If you re-use a nonce for two different signatures with the same key, it leaks the key. \n\nImagine a UTXO is encumbered with a script that says “you have to use 7” as the nonce. \n\nIf you can spend that UTXO and you sign more than one transaction spending it, you leak your private key. \n\nLots of interesting applications (especially in multi party settings) where you can make it costly for someone to sign two conflicting transactions",
"sig": "abe88f1ace7543da0e5419a2dc61a27b906e19553aeb05000e927b09f429138f3a118f9506b1321ee0a4c3c8e4a749500c9f7f54e77e37fa93f8dfd56d48010b"
}