[mriet]

This comment on github, by Yann Collet (of zstd fame), is the most enlightening, practical information about the practical uses of hashes and checksums that I've seen about hash collisions. I highely, highly recommend it:

https://github.com/Cyan4973/xxHash/issues/229#issuecomment-5...

[mriet]

Further down in the discussion, he also adds this comment, which is also good:

https://github.com/Cyan4973/xxHash/issues/229#issuecomment-6...