Motion Sensors in Your Phone Could Eavesdrop on Your Conversations

بسنت · 08-16-2014, 01:41 PM

Motion Sensors Your Phone Could Eavesdrop Your Conversations

In the age of surveillance paranoia, most smartphone users know better than to give a random app or website permission to use their device’s microphone. But researchers have found that there’s another, little-considered sensor in modern phones that can also listen in on their conversations. And it doesn’t even need to ask.

In a presentation at the USENIX security conference next week, researchers from Stanford University and Israel’s defense research group Rafael plan to present a technique for using a smartphone to surreptitiously eavesdrop on conversations in a room — not with a gadget’s microphone, but with its gyroscopes, the Sensors designed to measure the phone’s orientation. Those Sensors enable everything from motion-based games like Doodle Jump to cameras’ image stabilization to the phone’s displays toggling between vertical and horizontal orientations. But with a piece of software the researchers built called Gyrophone, they found that the gyroscopes were also sensitive enough to allow them to pick up some sound waves, turning them into crude microphones. And unlike the actual mics built into phones, there’s no way for users of the Android phones they tested to deny an app or a website access to those sensors’ data.

“Whenever you grant anyone access to Sensors on a device, you’re going to have unintended consequences,” says Dan Boneh, a computer security professor at Stanford. “In this case the unintended consequence is that they can pick up not just phone vibrations, but air vibrations.”

Read: Photos of Unexpected Shooting Targets Used by the World’s Armies

For now, the researchers’ gyroscope snooping trick is more clever than it is practical. It works just well enough to pick up a fraction of the words spoken near a phone. When the researchers tested their gyroscope snooping trick’s ability to pick up the numbers one through ten and the syllable “oh” — a simulation of what might be necessary to steal a credit card number, for instance — it Could identify as many as 65 percent of digits spoken in the same room as the device by a single speaker. It Could also identify the speaker’s gender with as much as 84 percent certainty. Or it Could distinguish between five different speakers in a room with up to 65 percent certainty.

But Boneh argues that more work on speech recognition algorithms Could refine the technique into a far more real eavesdropping threat. And he says that a demonstration of even a small amount of audio pickup through the phones’ gyroscopes should serve as a warning to Google to change how easily rogue Android apps Could exploit the sensors’ audio sensitivity.

“It’s actually quite dangerous to give direct access to the hardware like this without mitigating it in some way,” Boneh says. “The point is that there’s acoustic information being leaked to the gyroscope. If we spent a year to build optimal speech recognition, we Could get a lot better at this. But the point is made.”

المواضيع المتشابهه:

المصدر: منتديات همس المصريين - من قسم: Global News

Motion Sensors in Your Phone Could Eavesdrop on Conversations conversations eavesdrop motion phone

Share
- Share this post on
- Digg
- Del.icio.us
- Technorati
- Twitter

__________________

الوردة الزرقاء · 01-14-2015, 06:17 AM

سلمت يداك وبارك الله فيك

Share
- Share this post on
- Digg
- Del.icio.us
- Technorati
- Twitter

__________________
اللهم اني اعوذ بك من السلب بعد العطاء

08-16-2014, 01:41 PM	#1
بسنت ☻ المشرفة العامة ☻ تاريخ التسجيل: Sun Jul 2013 المشاركات: 16,216 معدل تقييم المستوى: 36 اوسمتي مجموع الاوسمة: 2	Motion Sensors in Your Phone Could Eavesdrop on Your Conversations Motion Sensors in Your Phone Could Eavesdrop on Your Conversations In the age of surveillance paranoia, most smartphone users know better than to give a random app or website permission to use their device’s microphone. But researchers have found that there’s another, little-considered sensor in modern phones that can also listen in on their conversations. And it doesn’t even need to ask. In a presentation at the USENIX security conference next week, researchers from Stanford University and Israel’s defense research group Rafael plan to present a technique for using a smartphone to surreptitiously eavesdrop on conversations in a room — not with a gadget’s microphone, but with its gyroscopes, the Sensors designed to measure the phone’s orientation. Those Sensors enable everything from motion-based games like Doodle Jump to cameras’ image stabilization to the phone’s displays toggling between vertical and horizontal orientations. But with a piece of software the researchers built called Gyrophone, they found that the gyroscopes were also sensitive enough to allow them to pick up some sound waves, turning them into crude microphones. And unlike the actual mics built into phones, there’s no way for users of the Android phones they tested to deny an app or a website access to those sensors’ data. “Whenever you grant anyone access to Sensors on a device, you’re going to have unintended consequences,” says Dan Boneh, a computer security professor at Stanford. “In this case the unintended consequence is that they can pick up not just phone vibrations, but air vibrations.” Read: Photos of Unexpected Shooting Targets Used by the World’s Armies For now, the researchers’ gyroscope snooping trick is more clever than it is practical. It works just well enough to pick up a fraction of the words spoken near a phone. When the researchers tested their gyroscope snooping trick’s ability to pick up the numbers one through ten and the syllable “oh” — a simulation of what might be necessary to steal a credit card number, for instance — it Could identify as many as 65 percent of digits spoken in the same room as the device by a single speaker. It Could also identify the speaker’s gender with as much as 84 percent certainty. Or it Could distinguish between five different speakers in a room with up to 65 percent certainty. But Boneh argues that more work on speech recognition algorithms Could refine the technique into a far more real eavesdropping threat. And he says that a demonstration of even a small amount of audio pickup through the phones’ gyroscopes should serve as a warning to Google to change how easily rogue Android apps Could exploit the sensors’ audio sensitivity. “It’s actually quite dangerous to give direct access to the hardware like this without mitigating it in some way,” Boneh says. “The point is that there’s acoustic information being leaked to the gyroscope. If we spent a year to build optimal speech recognition, we Could get a lot better at this. But the point is made.” المواضيع المتشابهه: تحميل لعبة Subway Surfers لأجهزة Windows Phone استعادة الموبايل بسهولة لو ضاع برنامج Find My Phone v4.9 دوار السفر , دوار الحركة Motion Sickness المصدر: منتديات همس المصريين - من قسم: Global News Motion Sensors in Your Phone Could Eavesdrop on Conversations conversations eavesdrop motion phone Share Share this post on Digg Del.icio.us Technorati Twitter __________________

01-14-2015, 06:17 AM	#2
الوردة الزرقاء ◘ مشرفة عامة ◘ تاريخ التسجيل: Mon Jun 2014 الدولة: الاردن - اربد المشاركات: 24,029 معدل تقييم المستوى: 40 اوسمتي مجموع الاوسمة: 1	رد: Motion Sensors in Your Phone Could Eavesdrop on Your Conversations سلمت يداك وبارك الله فيك Share Share this post on Digg Del.icio.us Technorati Twitter __________________ اللهم اني اعوذ بك من السلب بعد العطاء

أدوات الموضوع
مشاهدة صفحة طباعة الموضوع أرسل هذا الموضوع إلى صديق
انواع عرض الموضوع
العرض العادي الانتقال إلى العرض المتطور الانتقال إلى العرض الشجري

الذين يشاهدون محتوى الموضوع الآن : 1 ( الأعضاء 0 والزوار 1)