Exploits

Exploits that can expose your desktop computer or server to nasty event.

iPhone Unlocking Secret Revealed

iPhone Unlocking Secret Revealed: "The iPhone unlocking story took its next logical turn this week, with the release of a free iPhone unlocking program. Previously, unlocking required buying a commercial program or following a scary sequence of documented hardware and software tweaks.
How this happened is interesting in itself. (Caveat: This is based on the stories I’m hearing; I haven’t confirmed it all myself.) The biggest technical barrier to a software-only unlock procedure was figuring out the unlocking program, once installed on the iPhone, could modify the machine’s innermost configuration information — something that Apple’s iPhone operating system software was trying to prevent. A company called iPhoneSimFree figured out a way to do this, and used it to develop easy-to-use iPhone unlocking software, which they started selling.

reCAPTCHA: Stop Spam, Read Books

reCAPTCHA: Stop Spam, Read Books: 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.

About 60 million CAPTCHAs are solved by humans around the world every day. In each case, roughly ten seconds of human time are being spent. Individually, that's not a lot of time, but in aggregate these little puzzles consume more than 150,000 hours of work each day. What if we could make positive use of this human effort? reCAPTCHA does exactly that by channeling the effort spent solving CAPTCHAs online into "reading" books.

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