Even if none of the sites are compromised; even if your device is not stolen or lost; even if the sites don&#x27;t use password expiration it doesn&#x27;t work very well because some sites are just plain stupid with their password restrictions. Some of the things you&#x27;ll face:<p>• Passwords that prevent double characters within the password: not ideal when using a scheme.<p>• Passwords with a minimum&#x2F;maximum length: I&#x27;ve seen sites with a minimum of six characters and other sites with a maximum of eight characters. That means, to cover them all, you really have to choose a password of exactly six, seven or eight characters and even then it&#x27;s no guarantee.<p>• Sites that prevent certain punctuation and other sites that require punctuation. That means you have to remember which sites require which.<p>• Likewise, sites that require&#x2F;prohibit capital letters or require a mix of case.<p>It&#x27;s a nightmare doing anything other than recording them somewhere. And recording them somewhere is not great either as you always have to carry that thing with you and, if it&#x27;s electronic, remember to charge it.