Password policy
A password policy can be used to make sure that a password meets a certain amount of minimum requirements such as password length, numeric, alphanumeric symbols, …
There are a few options that can be used:
Change password after first login
Change password on portal
Minimum password length
Password expires after x days: This option makes it possible to force a user/subscriber to change his password
Block account after x login attempts
Password history: don't allow reuse of the same password, enforce a different password choice.
Password complexity (these options can be combined)
Numeric
Alphanumeric
Use special characters