What is the Name of the random "code" in the code box when you are signing on to some sites as a security check to prove you are genuine(Some hackers are getting past this too! )Invented 2001

Clue Answer has 7 letters starts with C

and sounds like a kids card/tag game (synonym)

Captcha -- an acronym for "Completely Automated Public Turing test to tell Computers and Humans Apart", trademarked by Carnegie Mellon University.

Thanks Professor for the correction ( I always get them mixed up)