> the rule of "don't roll your own crypto". That's an extremely important principle when doing the routine work of protecting sensitive information, but less r

> the rule of "don't roll your own crypto". That's an extremely important principle when doing the routine work of protecting sensitive information, but less relevant when you're making hash modifications that are going to be obsolete in a few months anyway. By the time anyone's done serious cryptanalysis, it's probably too late. Anyway, the worst case scenario is that things get screwed up and you need to do a premature hard fork that rolls back some transactions. Not the end of the world.