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Passwords are a good idea, in theory. They have the potential to act as afairly strong gateway. In practice though, passwords are plagued with problems.They are (1) easily shared, (2) trivial to observe and (3) maddeningly elusivewhen forgotten. While alternatives to passwords have been proposed, none, asyet, have been adopted widely. There seems to be a reluctance to switch fromtried and tested passwords to novel alternatives, even if the most glaringflaws of passwords can be mitigated. One argument is that there is not enoughinvestigation into the feasibility of many password alternatives. Graphicalauthentication mechanisms are a case in point. Therefore, in this paper, wedetail the design of two prototype applications that utilise graphicalauthentication mechanisms. However, when forced to consider the design of suchprototypes, we find that pertinent password problems eg. observation of entry,are just that: password problems. We conclude that effective, alternativeauthentication mechanisms should target authentication scenarios rather thanthe well-known problems of passwords. This is the only route to wide-spreadadoption of alternatives.

You Only Live Twice or "The Years We Wasted Caring about Shoulder-Surfing"