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  • Jun
  • 09
  • 2008

Computer Literacy Tests: Are You Human?

Every web surfer, has been forced to stop and perform this weird little task: look at a picture of some wavy, ghostly, distorted letters and type them into a box. By correctly transcribing it, you have proved to the computer that you are a human being.

The CAPTCHA caught on, and now it's all over the Web. Luis von Ahn, an assistant professor at Carnegie Mellon who was part of the original CAPTCHA team, estimates that people fill out close to 200 million CAPTCHAS a day. But you should pause…

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  • May
  • 18
  • 2008

Spammer Anti-CAPTCHA operations and Mass-Mailing Strategy - Security Labs Blog

Websense predictions about this strategy, made originally at the time of the Anti-CAPTCHA operations, have proven to be accurate. The spammers are now using these accounts for additional, random attacks that include sophisticated new methods.

Spammer Anti-CAPTCHA operations and Mass-Mailing Strategy

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  • Apr
  • 17
  • 2008

reCAPTCHA Mailhide

Tired of spam? reCAPTCHA Mailhide helps you protect your inbox by asking people to solve a reCAPTCHA before they can view your email address.
The reCAPTCHA can only be solved by humans, so this stops spammers from gaining access to your email address through automated programs. Here is an example: john…@example.com.

Enter an email address and we'll give you HTML code that requires users to solve a reCAPTCHA before they can see the address. (We stop spam, we don't create it — we won't share your address.)

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  • Apr
  • 07
  • 2008

Gmail being blocked by some anti-spam vendors

Over the past month, major anti-spam vendors have had to apply scrutiny to Gmail in a way they haven’t had to before, and the result is reduced delivery performance and sometimes outright blocking of Gmail.

After we learned of mail being greatly slowed by MessageLabs' corporate filtering service, we contacted them to see what's up. A support analyst with MessageLabs, a major provider of software-as-a-service anti-spam…

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