Audio Captcha is vulnerable, it can be cracked!!




Many websites rely on CAPTCHA to distinguish genuine humans from bots and malware. Now researchers have devised software that can be trained to decipher and defeat audio CAPTCHAs. 
CAPTCHAs are those frustrating tests that ask you to type in characters that correspond to words that have been obscured or defaced by graffiti.
The idea is this task should be easy for humans and impossible for non-humans but to assist the visually impaired many CAPTCHAs offer an audio alternative, in which a computerized voice reads out letters or digits distorted by noise, and these have been proved to be vulnerable to machine recognition. Decaptcha is a system to defeat audio CAPTCHAs based on non-continuous speech (i.e. a series of digits or letters rather than spoken words). Devised by a team of computer scientists who presented their research at this week's IEEE Symposium on Security and Privacy in Oakland California, it uses audio-processing techniques to remove the noise and identify the digits. The software has to be trained, a process that takes around 20 minutes for each type of CAPTCHA, but then can solve CAPTCHAs without human assistance. The software has proved effective against the systems currently used by eBay (82% accuracy), Microsoft (49%) and Yahoo (45%) but has has much less success with reCAPTCHA which uses background conversations to obscure the digits.
Even so with a success rate of 1.5%, a machine that made hundreds of attempts would quite quickly make a correct match - and would probably have more success than humans who also find reCAPTCHA difficult to decipher.

The researchers conclude that the use of "semantic noise" - i.e. noise such as background conversations or music is the least harmful to human understanding

at levels while also being most able to hinder Decaptcha’s performance.

SHARE OUR NEWS DIRECTLY ON SOCIAL NETWORKS:-

LINK TO OUR HOME PAGE :
Voice Of GREYHAT is a non-profit Organization propagating news specifically related with Cyber security threats, Hacking threads and issues from all over the spectrum. The news provided by us on this site is gathered from various Re-Sources. if any person have some FAQ's in their mind they can Contact Us. Also you can read our Privacy Policy for more info. Thank You ! -Team VOGH
If you enjoyed VOGH News, Articles Then Do Make sure you to Subscribe Our RSS feed. Stay Tuned with VOGH and get Updated about Cyber Security News, Hacking Threads and Lots More. All our Articles and Updates will directly be sent to Your Inbox. Thank You! -Team VOGH

Categories:
Related Posts Plugin for WordPress, Blogger...