IT Security Stack Exchange
IT Security Stack Exchange

Questions tagged [audio]

31 questions
22
votes
3 answers

How practical is a laser microphone and how to protect against it?

A laser microphone is a "surveillance device that uses a laser beam to detect sound vibrations in a distant object". - Wikipedia. It's also known as a Laser Based Listening System (LBLS). Firstly, how practical or easy is it to use a laser…
Bob Ortiz
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13
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2 answers

How to find all the microphones in a room?

"Smart" devices are all around us nowadays and many of them have built-in mics which can be be misused to spy on you in cases when the device is hacked (which is rather probable to happen as there are countless and growing vulnerabilities in all the…
Ivan
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12
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3 answers

Can a speaker be used as a microphone?

From LWN's security quotes of the week: These days audio hardware usually consists of a very generic codec containing a bunch of digital→analogue converters, some analogue→digital converters and a bunch of io pins that can basically be wired…
muru
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7
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1 answer

How sensitive are acoustic side-channels to compression with a narrowband codec?

Assume sensitive audio emissions from a mechanical keyboard. These audio emissions are often sufficient to reconstruct the actual key presses that generated the sound. If the audio is compressed using a narrowband audio codec such as G.711, how much…
forest
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6
votes
1 answer

32-bit Radio Voice Encryption, is it really that secure? If so, how?

I'm a student studying Electrical and Computer Engineering and a ham radio operator (i.e. my knowledge of encryption is basic). More and more, police and local government radio has become encrypted, this obviously prevents the average police scanner…
lswim
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5
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2 answers

Does the iOS 10 keyboard click sound divulge too much?

The updated keyboard in iOS 10 has at least three distinct "click" sounds that I'm aware of: a high click upon entry of any normal character; a mid-range click when entering a space, toggling shift, or switching between the ABC, 123, and #+=…
smitelli
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3
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2 answers

Is it possible to get malware through an incoming video/audio stream? (e.g. Omegle, Skype etc.)

Is it possible for incoming video/audio streams to contain malware through exploits in the transfer of the video/audio?
ElectricStarfish
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1 answer

Can I add 'user-identifying noise' to MP3 files to determine which user shared my file, if I find it later on the internet?

Problem I'm streaming MP3 files to users. Users are not allowed to share these files. I know that it's in the end impossible to not let anyone download the files. That's not the problem, people can download if they really want (but still I will try…
user21287
3
votes
3 answers

How to make sure that no one is watching you through webcam?

I have heard that intelligence agencies and hackers can illicitly gain access to a computer's webcam and microphone and keep a close eye on people using suspicious programs or malware. Is there any way to check if such thing is happening to you and…
Deepak Tatyaji Ahire
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3
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1 answer

Media files : how to protect from 0-day?

I am in the following situation : media files (image, audio, video) are uploaded from untrusted sources and made public to visitors. What are the best pratices for handling these potentially malicious files before they are served to users (to reduce…
msec24
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2
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1 answer

How secure is the wireless Bluetooth data stream going from my computer to my headphones?

Let's say I have bought a USB-to-Bluetooth dongle and "paired" it with my wireless Bluetooth headphones which I purchased by accident, thinking that they were wired. One of the biggest reasons I've always avoided wireless network, wireless mouse,…
Caseton Siebenhaar
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1 answer

How to stop my phone from secretly recording me?

I unplug my microphone from my computer when I am not using it. The same with my webcam. I am not using Alexa or similar. However, my smartphone has an included battery that I cannot take out. My phone might indicate that it has no wifi connection,…
Vitalis Hommel
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2
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1 answer

Steganography in MP3s

Is there a way to hide a message in an audio file and hear it by playing it in reverse? Like if you play the audio file forward, it will skip my secret message and just play the next frame, but is there a way to play it backwards and hear the secret…
Kelsie
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2
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4 answers

Is it possible to use steganography on an analog audio channel?

Is it possible to use steganography using an analog audio channel? I know this can be done using images. My idea is to encode an audio message in way that if listened by an ordinary device (e.g., radio or telephone) it delivers a normal message.…
user3496510
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2
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3 answers

Is it possible to put malware in an audio file with steganography?

I have recently read malware being hidden in a "usable" picture file with stenography such as this forum, https://www.bleepingcomputer.com/forums/t/574487/is-it-possible-for-a-virus-to-be-embedded-in-a-image/ . Could a malicious hacker use similar…
BillTheMagnificient
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