The comic https://xkcd.com/936/ makes an important point about usability for passwords. They need to be easy to remember and from a space with a high enough entropy. A similar problem is faced when evaluating hash or fingerprints. For a human we suggest that it is very difficult to compare long enough random alphanumeric sequence. We instead propose that the human should compare a few picture from an big enough picture space. When hope that this will lead to a lower probability for the success of spoofing of hashes or fingerprints. The goal of this thesis is to investigate whether this is true or not.