# Gavin Andresen # 2011-08-24 00:59:16 # https://bitcointalk.org/index.php?topic=38954.msg476696#msg476696 @s{quotedtext} @s{quotedtext} @p{brk} Because I want to enable these features reasonably soon, and modifying the way CHECKSIG works means a blockchain fork for clients that haven't upgraded. Which means giving at least 6 months notice to give everybody time to upgrade their clients. @p{par} At some point that will make sense, but with what I'm proposing it is not necessary. When SHA3 is finalized or a weakness is found in ECDSA or SHA256 maybe it'll be time to do that... @p{brk}