Comment by BitwiseFool

I belonged to an organization that had password complexity requirements. That's normal and understandable. However one requirement was that no part of my password could contain a three character subsstring that was included in my full name. I won't give my real name here, but sadly it includes some three letter subsequences that are somewhat common in many English words. I can understand a policy that prevents someone from using "matthew1234" as Matthew Smith's password, but this rule also prevents such a person from using "correcthorsebatterystaple" because it has 'att' in it.

Turns out, this rule was not from IT. It was a requirement from the cybersecurity insurance policy the organization had taken.