Have tape over your webcam? Might want to fill your headphones with wax as well!

Subject: General Tech | November 24, 2016 - 12:35 PM |
Tagged: security, hack, audio, Realtec

Security researchers have discovered a way to flip an output channel on onboard Realtec audio into an input channel, thus turning your headphones into an unpowered microphone.  The ability of a speaker or headphone to be used as a microphone is not news to anyone who has played around with headphones or input jacks, but it is possible some readers had deprived childhoods and have never tried this.  While you cannot mitigate this vulnerability permanently you could certainly notice it as your headphones would no longer play audio if the port is configured as input. 

Drop by Slashdot a link, and if you have never tried this out before you really should find an old pair of headphones and experiment with ports as well as snipping off one side of a pair of earbuds.  One supposes iPhone 7 users need not worry.

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"In short, the headphones were nearly as good as an unpowered microphone at picking up audio in a room. It essentially "retasks" the RealTek audio codec chip output found in many desktop computers into an input channel. This means you can plug your headphones into a seemingly output-only jack and hackers can still listen in. This isn't a driver fix, either."

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Source: Slashdot

Have you ever wanted an audio codec decoder?

Subject: General Tech | April 16, 2012 - 02:45 PM |
Tagged: VIA, Realtec, decoder, codec, C-Media, audio, Analog Devices

There are a wide range of audio coder/decoders on the market, from a variety of vendors providing codecs for both onboard audio as well as for discrete cards which can prove confusing to even veteran PC builders.  With Analog Devices, Realtec, C-Media, VIA and several other smaller vendors providing a wide range of codecs and controllers you can easily be lost in the alphabet soup of model names.  Perhaps you wish there was a handy reference that would give you a list of the basic capabilities of these codecs, like the Channels available, input and output resolution, the maximum sampling rates and the signal to noise ratio?  Hardware Secrets has heard your plea and assembled a list of the more common codecs on the market today which you can refer to here.

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"Audio codec is a small chip measuring 0.25 sq. in. (7 mm2) located on the motherboard in charge of the analog audio functions. Knowing the specs of a codec will permit you to compare the audio quality of different motherboards, allowing you to choose the right product for your needs."

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