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Comment on AmEx: "We discourage the use of special characters because..."parent

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why not just throw a hash function in the middle? technically you're not increasing the search space for a brute-force attack (but that's not the goal), but you are probably slightly increasing entropy. and most of all, you avoid bad PR like this. :)

that said, it's probably still quite expensive and this PR isn't that bad.

Interesting post. But it doesn't make the case that the title promises.

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