qwertymoron

Phone line keylogger?

15 posts in this topic

I was wondering if there is keylogger for phone lines, a key logger is something that catches all information that runs through the keyboard wire. Is it possible to capture all the information runnig through a phone line? Thanks.

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are you talking about a wire tap, or just something that records the dial tones when people call out?

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beh double post..

Edited by dinscurge
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beh double post..

Actually, this ties into the thread about audio manipulation. You can easily write your own recording and analysis app. Both MAX/MSP and CSound provide a platform for writing apps that can be used to identify frequencies.

http://csound.sourceforge.net/

There are several different programming methods for determining frequency from an input source (Fourier Analysis, etc). I can make some suggestions and provide you more info if you choose to go this route. (and I may actually have some old Fourier CSound code lying around).

best,

Pan

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Theres some hardware here

http://www.sandman.com/digit.html

Tone-Master TM-16 Digit Decoder Supposedly decodes DTMF tones from tape or audio card but its about $200.. thats alot of dough compared to a homegrown program. I would be interested in helping that program along if I would be able to (Ive programmed plenty but never any csound, and I dont know anything about sound waves), And if I couldnt help Id really like to learn from it. If a program like that was written the best route for might be as a plugin in for Asterisk and the others.

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Thanks for the help guys but I'm not trying to get the tones but rather the 'RAW' data travelling through the wire and some how load it onto a computer. Could the information be read as codes? and if so how hard would it be to decipher? Thanks.

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I was thinkin' could I connect a keylogger to 2 phoneline usb adapters to catch the data?

[] USB Keylogger

-- Phone Line

== Phone Line USB Adapter

like this

-----=====[]=====----

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Thanks for the help guys but I'm not trying to get the tones but rather the 'RAW' data travelling through the wire and some how load it onto a computer. Could the information be read as codes? and if so how hard would it be to decipher? Thanks.

So, are you talking about something which would sniff data through a modem or fax connection? What other data on a phoneline could there be aside from DTMF tones and voice recording unless your talking about a connection via modem (I dont know if that would be called a keylogger)?

Edited by p0id
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you could only eavesdrop on faxes and really old modems Unless your looking to do some work.

from http://docstore.mik.ua/orelly/networking/puis/ch14_04.htm

14.4.4 Protecting Against Eavesdropping

Modems that are not adaptive are very susceptible to eavesdropping and wiretapping. Non-adaptive modems include data modems that are slower than 9600 baud and most fax modems.

Im not an expert though. Thats just what I found on the subject.

Edited by p0id
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I was wondering if there is keylogger for phone lines, a key logger is something that catches all information that runs through the keyboard wire. Is it possible to capture all the information runnig through a phone line? Thanks.

Yes. It's called a pen register.

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I was wondering if there is keylogger for phone lines, a key logger is something that catches all information that runs through the keyboard wire. Is it possible to capture all the information runnig through a phone line? Thanks.

Yes. It's called a pen register.

I think he meant he needed something to eavesdrop on a 28 or 56k modem signal, It just wasn't stated clearly enough.

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I built a little device a few months back for a friend which is not much more than a PIC based DTMF logger/decoder. I think I also used a HT9170 dual tone multi frequency (DTMF) receiver IC and a handful of other components, not costing more than $20. I'll see if I can dig the diagram up, although I think I did it on the back of a shopping receipt.

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I remember reading about a wire tap that was wireless. It was a small box with I think a coil of copper wire. You could simply open it, and snap it closed over a telephone wire. Then you could simply listen in on the call that way.

Can anyone remind me what this was?

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