📅 Original date posted:2023-07-24
🗒️ Summary of this message: Party 1 is unable to determine the final value of (R, s1+s2) or m, but a blinding step may be missing, allowing the server to scan the blockchain for signatures and compute corresponding hashes to check for a match.
📝 Original message:
> Party 1 never learns the final value of (R,s1+s2) or m.
Actually, it seems like a blinding step is missing. Assume the server (party 1)
received some c during the signature protocol. Can't the server scan the
blockchain for signatures, compute corresponding hashes c' = H(R||X||m) as in
signature verification and then check c == c'? If true, then the server has the
preimage for the c received from the client, including m.
Jonas Nick [ARCHIVE] /
npub1at…y3z5a
2023-07-24 17:55:41
in reply to nevent1q…rcjp
Author Public Key
npub1at3pav59gkeqz9kegzqhk2v4j4r435x42ytf23pxs8crt74tuc8s2y3z5aPublished at
2023-07-24 17:55:41Event JSON
{
"id": "404797f6880c092e3bf48fe0f8abf971b09dc1f4f93e5942312026d0ce8ca0d5",
"pubkey": "eae21eb28545b20116d940817b2995954758d0d5511695442681f035faabe60f",
"created_at": 1690214141,
"kind": 1,
"tags": [
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],
"content": "📅 Original date posted:2023-07-24\n🗒️ Summary of this message: Party 1 is unable to determine the final value of (R, s1+s2) or m, but a blinding step may be missing, allowing the server to scan the blockchain for signatures and compute corresponding hashes to check for a match.\n📝 Original message:\n\u003e Party 1 never learns the final value of (R,s1+s2) or m.\n\nActually, it seems like a blinding step is missing. Assume the server (party 1)\nreceived some c during the signature protocol. Can't the server scan the\nblockchain for signatures, compute corresponding hashes c' = H(R||X||m) as in\nsignature verification and then check c == c'? If true, then the server has the\npreimage for the c received from the client, including m.",
"sig": "5542415ba679552310aa1a0e091b77a9c83b425c8e6df69e306694796a136441f414f71a7205385d160bcd31de55181700f6d5cbd3ec52116505a3fa8f15983f"
}