Abstract
This thesis focuses on studying characteristics of Norwegian passwords as a means to find the best way of attacking them. This was done by using a password-cracking tool to attack offline copies of several password data breaches. We found that a majority of Norwegian passwords use long passwords but equally as many of them still use passwords found in known password leaks. In conclusion we recommend that Norwegians can strengthen their passwords by increasing their passwords length, add more special Norwegian characters and most importantly check their passwords against lists of leaked passwords.