The easier a password is for the owner to remember generally means it will be easier for an attacker to guess.[12] However, passwords that are difficult to remember may also reduce the security of a system because (a) users might need to write down or electronically store the password, (b) users will need frequent password resets and (c) users are more likely to re-use the same password across different accounts. Similarly, the more stringent the password requirements, such as "have a mix of uppercase and lowercase letters and digits" or "change it monthly", the greater the degree to which users will subvert the system.[13] Others argue longer passwords provide more security (e.g., entropy) than shorter passwords with a wide variety of characters.[14]