Computer scientists prevent data theft on smartphones and tablet computers

Feb 27, 2013
Some mobile applications on web-enabled mobile phones and tablet computers spy on personal data. Computer scientists from Saarbrücken prevent this through a new approach. The freely available app attacks the program code of the digital spies. Credit: Bellhäuser - das bilderwerk

Some mobile applications on web-enabled mobile phones and tablet computers spy on personal data. Computer scientists from Saarbrücken prevent this through a new approach. Its chief attraction: For the protection to work, it is not necessary to identify the suspicious programs in advance, nor must the operating system be changed. Instead, the freely available app attacks the program code of the digital spies. The researchers present the app at Cebit 2013 in Hanover.

"Malicious Android apps are becoming a mass plague" is the headline of a study published by a German software company for anti-virus programs in recent days. That this is not just a is confirmed by the analysis of the governmental supported "Stiftung Warentest" . In May last year, it categorized 37 popular apps as "critical" for the user's privacy.

"I am not surprised. My smartphone knows everything about me, starting with my name, my phone number, my e-mail address, my interests, up to my current location," explains computer science professor Michael Backes, who manages the Center for IT-Security, Privacy and Accountability at Saarland University.

To prevent smartphones and tablets turning into digital spies the researchers have developed a new method which works for the Android operating system. "Similar to a screening line, the method scans every selected app installed on the smartphone and indicates its real behavior: Accessing your private contacts, establishing a connection to the internet and checking your position", Backes explains. The user can now revoke or grant privileges to the respective app at any time. A company founded by Backes used the published method to develop an app named "SRT Appguard". It runs problem-free on Android 2.0 and higher. It is also now guaranteed that the guarded apps receive updates from the Play Store.

For their approach, the Saarbrücken researchers use the fact that the Android apps, written in the programming language Java, run in a so-called virtual machine. Compared to other smartphone operating systems, a running app can access the storage of Android's virtual machine. That's when SRT Appguard comes into play. Before the suspicious app starts, Appguard scans the storage of the virtual machine to detect security-critical functions – identified by the IT-security experts from Saarbrücken. It does not manipulate the bytecode anymore. Instead, it directs the function call within the virtual machine to the security monitor, which observes the suspicious method calls and can even block them.

Explore further: Hong Kong democracy protesters flock to new messaging app

More information: Michael Backes, Sebastian Gerling, Christian Hammer, Matteo Maffei and Philipp von Styp-Rekowsky: The Android Monitor – Real-time policy enforcement for third-party applications
www.infsec.cs.uni-saarland.de/… /android-monitor.pdf

Download of SRT Appguard from the software register Heise.de
www.heise.de/download/srt-appguard-1187469.html

add to favorites email to friend print save as pdf

Related Stories

Yahoo! helps find smartphone 'apps'

Jun 16, 2011

Yahoo! has begun helping people navigate the sea of applications available for Apple iPhones or mobile gadgets powered by Google-backed Android software.

Android users get malware with their apps

Mar 02, 2011

(PhysOrg.com) -- As new platforms make their way into the market there will always someone who is looking to exploit them for illegal or unethical ends. More proof of that fact has come today when Google was ...

Recommended for you

Microsoft skips Windows 9 to emphasize advances

4 hours ago

The next version of Microsoft's flagship operating system will be called Windows 10, as the company skips version 9 to emphasize advances it is making toward a world centered on mobile devices and Internet ...

Microsoft to offer early look at next Windows

Sep 29, 2014

Microsoft plans to offer a glimpse of its vision for Windows this week, as its new CEO seeks to redefine the company and recover from missteps with its flagship operating system.

User comments : 0