Author Topic: How can one listen in on cordless telephone conversations?  (Read 3098 times)

Offline Tonto

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How can one listen in on cordless telephone conversations?
« on: January 26, 2011, 06:06:53 PM »
Dect 6.0 telephones are becoming more popular. It was once relatively easy to listen to telephone conversations with police scanners, but it's thought by many to be almost impossible to do with the cordless telephones of today.

But today I found this:

http://www.h-online.com/newsticker/news/item/25C3-Serious-security-vulnerabilities-in-DECT-wireless-telephony-739493.html

Anyone know how to pull this off?

Offline nyphonejacks

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Re: How can one listen in on cordless telephone conversations?
« Reply #1 on: January 26, 2011, 06:33:32 PM »
that article discussed cracking of DECT in germany (1.8Ghz) not DECT 6.0 used in the US (1.9Ghz)

not sure if that makes too much of a difference... but very curious to know if anyone else on here has any further information regarding this.

Offline BadFish

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Re: How can one listen in on cordless telephone conversations?
« Reply #2 on: February 08, 2011, 03:43:08 PM »
If you can find the proper card you can indeed listen in to DECT. https://dedected.org/trac

The Com-On-Air card that most use for this is no longer made, and thus a tad rare. The next possible solution seems to be the USRP which can listen in to this stuff along with Linux, but it costs $700

You can find all the info on the above page.

Offline judasiscariot

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Re: How can one listen in on cordless telephone conversations?
« Reply #3 on: February 08, 2011, 06:29:16 PM »
You can get USRP devices at http://www.ettus.com/products or you check out the schematics - http://gnuradio.org/redmine/wiki/1/USRP

My first though was, "what about the encyption?".  Then I learned it can deactivate the encryption by pretending to be a base station.  Interesting stuff....
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