ReCAPTCHA is a system designed to establish that a computer user is human (normally in order to protect websites from bots) which was acquired by Google in September 2009. The new 2.0 version has only 2 visual themes; light and dark, while the original ReCAPTCHA had 4; red, white, blackglass, clean, and an extra 'custom' mode which allowed more advanced customisation. These impenetrable aesthetic choices of the new version symbolise the dichotomous and inaccessible features of online securities, which continues to "digitise books, newspapers and images that cannot be deciphered by scanning technology, therefore using humans to do their work for them", via the "I am not a robot" tests. The terminology here is ironic, as we are reminded that we are not robots, even though we take part in the non-consensual unpaid labour of helping digital corporations with their work.