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Colour, usability and security: a case study

Lookup NU author(s): Ahmad El Ahmad, Dr Jeff Yan



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.

Publication metadata

Author(s): El Ahmad AS, Yan J

Publication type: Report

Publication status: Published

Series Title: School of Computing Science Technical Report Series

Year: 2010

Pages: 14

Print publication date: 01/05/2010

Source Publication Date: May 2010

Report Number: 1203

Institution: School of Computing Science, University of Newcastle upon Tyne

Place Published: Newcastle upon Tyne