> On Feb 26, 2017, at 1:36 AM, Pieter Wuille <pieter.wui...@gmail.com> wrote: > > Typical hash function breaks produce collision attacks, while a preimage > attack is needed to reduce single-key address security.
Thank you Pieter - that was really helpful. I realize now that I was thinking of a preimage attack but had mistakenly assumed that the birthday bound applied... So the unit operation: [genkeypair; ripemd160(sha256(pubkey));check_utxoset] would need to be performed 2.9*10^42 and not (as I had first calculated) 2.4*10^18. Oops. My bad. _______________________________________________ bitcoin-dev mailing list bitcoin-dev@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
