captchas
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RIM patent uses motion, CAPTCHAs to stop texting while driving, shows a fine appreciation of irony
More and more people understand that texting while driving is a bad idea, but RIM has just been granted a patent that would have smartphones step in before things get out of hand. Going beyond just filtering inbound messages like some motion-based lockdown apps, the BlackBerry maker's invention also turns off the creation of any outbound messages as long as the phone is moving within a given speed range. The override for the lock is the dictionary definition of ironic, however: the technique makes owners type out the answer to a CAPTCHA challenge onscreen, encouraging the very problem it's meant to stop. As much as we could still see the hassle being enough to deter some messaging-addicted drivers, we have a hunch that the miniscule hurdle is a primary reason why the 2009-era patent hasn't found its way into a shipping BlackBerry. Maybe RIM should have chronic texters solve a Rubik's Cube instead.
PlayThru hopes to kill text captchas with game-based authentication
At their worst, captchas are impossible to decipher; at their best, they're... fun? A startup called Are You a Human has developed PlayThru, an alternative to text-based authentication. Instead of requiring the user to type some blurry, nonsensical word, PlayThru has them play a mini-game, such as dragging and dropping a car into an open parking spot. The startup says this method is more secure than word captchas -- since automated bots have a harder time solving these image-based puzzles -- and more fun, because users generally have a better time when their ability to identify letters isn't called into question. PlayThru has been in beta for several months and is currently available as a free download. On May 21st, the solution will officially launch on both PCs and smartphones. Click through to the source link to try out the captcha alternative for yourself.
Stanford program cracks text-based CAPTCHAs, shelters the replicants among us
CAPTCHAs. In the absence of a Voigt-Kampff apparatus, they're what separate the humans from the only-posing-to-be-human. And now three Stanford researchers have further blurred that line with Decaptcha, a program that uses image processing, segmentation and a spell-checker to defeat text-based CAPTCHAs. Elie Bursztien, Matthieu Martin and John Mitchell pitted Decaptcha against a number of sites: it passed 66% of the challenges on Visa's Authorize.net and 70% at Blizzard Entertainment. At the high end, the program beat 93% of MegaUpload's tests; at other end, it only bested 2% of those from Skyrock. Of the 15 sites tried, only two completely repelled Decaptcha's onslaught -- Google and reCaptcha. So what did the researchers learn from this? Randomization makes for better security; random lengths and character sizes tended to thwart Decaptcha, as did waving text. How long that will remain true is anyone's guess, as presumably SkyNet is working on a CAPTCHA-killer of its own.
