Password and security ninaul Your NTNU password is as secret as your Visa/mastercard code. Learn how to keep it secret in the best possible ways. Safekeeping Why can't I write it down? It's much easier for other to get hold of your password if you do write it down somewhere. And if someone gets hold of your password, they can use it to gain access to the computersystems and create a great deal of trouble for both you and other users. Learn more about why other people shouldn't use your password and account.. But it's so hard to remember my password! You can do something about that yourself. Read more abouthow to make safe and good passwords who are easy to remember. And here are some tips on how to remember your password..