>> Please note as well that you need 4G of data until you have a
>> guaranteed collision.
> Huh?  I don't understand the origin of that number.

I didn't come up with it, but I suspect that it was due to wetware
confusion with the (true) statement "you need 4G different data blocks
until you are guaranteed to have a hash collision between two of them".
(Which is true of any 32-bit hash, including 32-bit CRCs.)

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