Google's reCAPTCHA Anti-Bot Service Simplified for Human Users.

The article discusses the improvements in the user-dialogue system reCAPTCHA posted by Vinay Shet, product manager for reCAPTCHA, on the Google Online Security Blog as of October 25, 2013 implementing risk analysis techniques. The nonsymmetrical letters challenge the automated bots to enter into the website, while the numerals are not visible to the Internet bots. The Completely Automated Public Turing test to tell Computers and Humans Apart was developed by professor Von Ahn in 2000.