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Would like to create a strong password in C++. Any suggestions?
I assume it should use alpha (upper and lower), numeric, special characters.
It would be good to be able to specify a minimum length.
It would be great to avoid characters that are hard to visually distinguish like ‘O’ and ‘O’
It would be great to void all characters same, dictionary words, reversed words, names.
Any other tips? Where could I find code like this?
APG (Automated Password Generator) implements all but your last requirement (no dictionary words / usernames / repeated characters). It includes both pronounceable and fully random password generation algorithms. Pronounceable passwords look something like this:
It’s written in C and is available under a BSD-like license.
Cryptographically speaking, I’m not sure that your last requirement is valid…? If the password generation is truly random, then a password of
aaaaaaaais just as likely as a password of6-n&1jIK, and if your attacker knows your algorithm, then by disallowing passwords likeaaaaaaaa, you’re reducing the attacker’s search space.