Spam defeats CAPTCHAs

摘要

Spammers And Fraud Artists; are getting more devious in their efforts to use legitimate services such as Yahoo and Gmail to put a thorn into the side of Web administrators. Miscreants are finding ways to get around CAPTCHA, or those ragged, faded, distorted-looking numbers and letters that many Web sites ask users to enter in order to confirm they are real people. CAPTCHA, which stands for Completely Automated Public Turing Test to Tell Computers and Humans Apart, is used by services such as Yahoo, Google, Hotmail and ad site Kijiji.