2 ms·
> What if the files are intentionally created to match the desired hash? That's called a second-preimage attack and is similarly infeasible to achieve against
by Ajedi32 5y ago
> What if the files are intentionally created to match the desired hash?
That's called a second-preimage attack and is similarly infeasible to achieve against a cryptographically secure hash function.
There are good arguments to be made for why this is a bad idea, but hash collisions aren't one of them.
- skinkestek 5y agoBut this isn't your average hash function. This is a function that is created to be robust against modifications to the image. A perfectly robust function would - in my opinion - be one that could detect even a recreation of the original setup. I don't know where on this scale the function law enforcement use is, but if it is any good I struggle to see how it cannot detect similar legal imagesm