Colour, usability and security: a case study
Ahmad El Ahmad, Jeff Yan · 2010
The use of colour in user interfaces is extensive. It is typically a usability issue, and has rarely caused any security concerns. In this ar ticle, 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 inter esting but critical implications on both security and usability.