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<achow101>
is it possible to create a proof which proves that a blob of data is an encrypted private key which corresponds to a given public key?
<gmaxwell>
achow101: your question is underspecified, I don't see how it excludes that tautology that pubkey is a self cooresponding encryption of 1 with its provate key.
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<achow101>
gmaxwell: apparently some scammers have taken to adding a ckey record to wallet files where the "encrypted key" is just garbage and not the private key that corresponds to the public key in that record
<achow101>
I was thinking whether it was possible to construct some proof to append to the ckey record that proves the encrypted private key is actually the private key
<achow101>
but it's a pointless thing to do because scammers will just use old wallet versions which don't support this change
<gmaxwell>
scammers? you mean saviors of mankind.
<gmaxwell>
people who buy stolen wallets to crack are the bad guys...
<achow101>
I presume the scam is along the lines of "heres an encrypted wallet with money and we will sell you the password"
<gmaxwell>
it would be easy to design the wallet in such a way that you couldn't make fake encrypted wallets... but you couldn't prevent there from being a real encrypted wallet where the password will never be guessable.
<gmaxwell>
achow101: well your requested proof wouldn't prevent that scam.
<achow101>
right, i've turned this into a thought experiment :)
<luke-jr>
could you "encrypt" the private key by saving only a signature made with K=passphrase?
<luke-jr>
then you could verify the signature to prove it is the correct private key
<luke-jr>
achow101: gmaxwell: ^
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<achow101>
luke-jr: that's an interesting idea
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<gmaxwell>
I still don't see what you're trying to prove.
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<luke-jr>
gmaxwell: he wants to prove that some passphrase in fact does exist which would reveal a private key; arguably this is not useful to prove, so it's become a thought exercise
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<instagibbs>
waxwing, both amount and bytes I guess, since they're related to the same concept: effective value of wallet outputs in total
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