Colour, usability and security: a case study

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  2. Ahmad El Ahmad
  3. Dr Jeff Yan
Author(s)El Ahmad AS, Yan J
Publication type Report
Series TitleSchool of Computing Science Technical Report Series
Year2010
Legacy DateMay 2010
Report Number1203
Pages14
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The use of colour in user interfaces is extensive. It is typically a usability issue, and has rarely caused any security concerns. In this article, we show that the use of colours in the design of CAPTCHA, a standard security technology that has found widespread applications in commercial websites, can have interesting but critical implications on both security and usability.
InstitutionSchool of Computing Science, University of Newcastle upon Tyne
Place PublishedNewcastle upon Tyne
URLhttp://www.cs.ncl.ac.uk/publications/trs/papers/1203.pdf
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