What it is
Many online forms at UNI and elsewhere get large amounts of spam. One fairly straight forward method of defeating this problem is to implement a Captcha. Captcha stands for Completely Automated Public Turing test to tell Computers and Humans Apart. A captcha is simply an image of a word or a series of characters, often skewed and with distractions to make them possible for humans to read but hard or impossible for bots to defeat. Captchas are easy and cheap, but do come with several disadvantages, the main being some accessibility issues.
How it's used
by University Marketing & Public Relations