The first is that alternatives are rarely investigated beyond the initial proposal, with only the results from a constrained lab test provided to convince adopters of their viability. Alternatives are unconvincing for three primary reasons. The need for a replacement is widely acknowledged yet despite over a decade of research into knowledge-based alternatives, few, if any, have been adopted by industry. Initial deployment did not reveal the problems of passwords deep and profound flaws only emerged once passwords were deployed in the wild.
In this paper, we present and evaluate a graphical authentication mechanism, Tetrad, which appears to have the potential to address these specific concerns.Īlphanumeric authentication routinely fails to regulate access to resources with the required stringency, primarily due to usability issues. Such a secret has an economic cost in terms of replacement, recall and revenue, all of which affect the financial return of the offending systems and services. This may not be a real concern within the con- text of secluded space but inadvertly reveals a secret within shared space. Apple iPhone and Nintendo Wii, regularly require users to use an on-screen keyboard for character input. Asterisks may obfuscate alphanumeric characters on entry but popular systems, e.g.
#Screenium fade in password
This new reality places pressure on a password mechanism never intended for use in such a context. However, it is clearly inadequate in a world where in- creasing numbers of systems and services require people to authen- ticate in a shared space, while being actively observed. Alphanumeric authentication, by means of a secret, is not only a powerful mechanism, in theory, but prevails over all its competitors in practice.
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