[NoMoreNicksLeft]

> Most anyone would agree that the hash matching should probably form probable cause for a warrant

I disagree with this. Yes, if we were talking MD5, SHA, or some similar true hash algo, then the probability of a natural collision is small enough that I agree in principle.

But if the hash algo is of some other kind then I do not know enough about it to assert that it can justify probable cause. Anyone who agrees without knowing more about it is a fool.

[cool_dude85]

That's fair. I came away from reading the opinion that this was not a perceptual hash, but I don't think it is explicitly stated anywhere. I would have similar misgivings if indeed it is a perceptual hash.