📅 Original date posted:2013-05-27
📝 Original message:Commenting on my own mail...
Rereading the BIP, it occurs to me that the private derivation is
actually intentional. So:
(m/i/j/k)*G = (M/i/j/k), but (m/i'/j/k)*G <> (M/i/j/k) (M/i'/j/k => ERROR)
But: ((m/i')*G)/j/k = (m/i'/j/k)*G
So, the motivation for the private derivation is to avoid the known (K,
c) and known k_i => k known too! I fear that many will fall in this
trap, though...
/Michael
Michael Gronager [ARCHIVE] /
npub1nc…gw452
2023-06-07 15:02:29
in reply to nevent1q…vr3w
Author Public Key
npub1nc78dlt7hp3v5dl32qu3m678h2j0ss374glcjnz8df75xcx7ngpq4gw452Published at
2023-06-07 15:02:29Event JSON
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"content": "📅 Original date posted:2013-05-27\n📝 Original message:Commenting on my own mail...\n\nRereading the BIP, it occurs to me that the private derivation is\nactually intentional. So:\n(m/i/j/k)*G = (M/i/j/k), but (m/i'/j/k)*G \u003c\u003e (M/i/j/k) (M/i'/j/k =\u003e ERROR)\n\nBut: ((m/i')*G)/j/k = (m/i'/j/k)*G\n\nSo, the motivation for the private derivation is to avoid the known (K,\nc) and known k_i =\u003e k known too! I fear that many will fall in this\ntrap, though...\n\n/Michael",
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