Some systems require you to change your password at regular intervals, such as every 30, 60 or 90 days. This is most common for your computer account at work, but some websites may require it too. If you are a systems administrator, it is good practice to change admin account password for routers and firewalls periodically. Even for social media and other websites, it is not a bad idea to change your password every year or so.
This is not a problem for the STEN method. You can
