Researchers developed Real-Time Captcha technique

Researchers have developed a new login authentication approach known as Real-Time Captcha to improve the security of current biometric techniques, according to a study conducted on February 19, 2018.

According to this technique, when a captcha appears on the screen with a question, the users are to look into the built-in camera of their mobile phones. Only a limited period of time is given to the users to give the response, which is too short for any machine learning programs to respond. Nowadays, biometric techniques are preferred in mobile devices and online services, and traditional password login is being eliminated now.

Wenke Lee, a professor said, “If the attacker knows that authentication is based on recognizing a face, they can use an algorithm to synthesize a fake image to impersonate the real user.” However, by using a Captcha image, the attacker can be prevented from knowing what to expect. This technique is brought in so that it becomes easy for humans and difficult for machines. 30 objects were used for the testing and it was found that humans responded to all the challenges in one second or less and machines took six to ten seconds for decoding the questions.

To prevent the accessibility of websites to bots, this Captcha technology is being widely used. A human’s ability to identify patterns makes the working of this technology easier. Identifying a speech in the midst of a noisy environment and a secured connection between the device camera and the server is still a challenge. Lee said, “For any security mechanism that we develop, we need to worry about the security of the mechanism first.”

This new technique will increase the growth of global biometric sensors market, as elaborated in the global biometric sensors market report published by Coherent Market Insights.

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