If you use the Web, you have probably encountered an annoying invention called a CAPTCHA. They're the squished-up, stretched and squiggled, color-blotched collections of letters that often must be ...

How do you let people create user accounts or post comments on your Web site without letting spam bots in? Simple — make your users prove they’re human. Many Web sites use CAPTCHA (Completely ...

MUMBAI, India — Faced with stricter Internet security measures, some spammers have begun borrowing a page from corporate America’s playbook: they are outsourcing. Sophisticated spammers are paying ...

Apple took several steps toward a password-free future at its Worldwide Developer Conference, but another component of its strategy will be to replace CAPTCHA (Completely Automated Public Turing Test ...