Quote from: kokjo on July 02, 2013, 09:06:07 AM

Quote from: leijurv on July 02, 2013, 02:23:37 AM

However, there could be a RIPEMD-160 hash collision of two different ECDSA pubkey point. That would have two different privkeys with one pubkey.

their would be 2 keypairs, where the hash of the public keys would be equal.

keypair A: (Apub, Apriv)
keypair B: (Bpub, Bpriv)

Apub != Bpub and Apriv != Bpriv

BUT!!!!!

hash(Apub) == hash(Bpub)

Yes. However, that would mean that the bitcoin address itself would be the same. Funds sent to that bitcoin address could be spent by either private key; the txout script only checks the hash of the pubkey key, not the public key itself.