Shinseungback Kimyonghun (say that out-loud five times), is a Seoul based artist group consisting of Shin Seung Back and Kim Yong Hun. One of their creations is the Captcha Tweet, "an application which users can post tweets in a CAPTCHA form with. Since computers can hardly read it, humans can communicate behind their sight."
We see CAPTCHA as a symbol of the relationship between human vision and computer vision and the intervention of computers in human life. CAPTCHA Tweet attempts to re-present this implication of CAPTCHA to the public sphere by applying it to the social network communication.