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reCAPTCHA Mailhide secures your e-mail link online

I just came across a fantastic free service which utilizes the CAPTCHA image generation feature (you know, the hard-to-read distorted words on website registration forms) that offers a free service for performing the same protection for linking to an e-mail address:

A CAPTCHA is a program that can tell whether its user is a human or a computer. You've probably seen them — colorful images with distorted text at the bottom of Web registration forms. CAPTCHAs are used by many websites to prevent abuse from "bots," or automated programs usually written to generate spam. No computer program can read distorted text as well as humans can, so bots cannot navigate sites protected by CAPTCHAs.

Here is a link to my e-mail address (fill out the reCAPTCHA form and you'll get my unencrypted e-mail address). This is perfect for posting your address publicly, but protecting it from being picked up by spam bots/spiders that routinely scour websites for e-mail addresses. I've also posted this link in the "about the author" page on this blog, too (no more having to contact me through my LinkedIn profile!).

Furthermore, reCAPTCHA also has the added benefit of using their API to help digitize books: