Re:We didn't encrypt your password, we hashed it
by tialaramex on Saturday September 05, 2020 @05:26AM
(#24382439)
Allowing symbols increases the search space, but requiring them reduces it.
And in practice this effect can be exaggerated when people don't use random passwords but must actually choose a password they'll remember - because what they'll actually do is choose something easy and then shove a symbol in there to meet your requirement. You may well allow 30+ different symbols, or even more, but the users will invariably pick one of a dozen or so that were easiest to reach on their keyboard and they may learn to be shy of characters that sometimes "don't work" such as quote marks and any local currency symbol even if those are easy to type.
And in practice this effect can be exaggerated when people don't use random passwords but must actually choose a password they'll remember - because what they'll actually do is choose something easy and then shove a symbol in there to meet your requirement. You may well allow 30+ different symbols, or even more, but the users will invariably pick one of a dozen or so that were easiest to reach on their keyboard and they may learn to be shy of characters that sometimes "don't work" such as quote marks and any local currency symbol even if those are easy to type.