steganography

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killerguy
Posts: 10
Joined: Fri Sep 07, 2018 4:37 pm
Operating System: Windows 10

steganography

Post by killerguy » Fri Sep 07, 2018 4:44 pm

Hello,I got a one question.
So I'm working on steganography,and one user hidden text in audio.
This text can't be readed,but there're white points,which completely shows that here exist some text information.
How can bright or see these white dots in Audacity?
Thank you for your help!
2018-09-07_204217.png
2018-09-07_204217.png (181.88 KiB) Viewed 5976 times
Last edited by steve on Fri Sep 07, 2018 5:59 pm, edited 1 time in total.
Reason: Give topic relevant title

Trebor
Posts: 9881
Joined: Sat Dec 27, 2008 5:22 pm
Operating System: Windows 8 or 8.1

Re: steganography

Post by Trebor » Sat Sep 08, 2018 3:59 am

killerguy wrote:
Fri Sep 07, 2018 4:44 pm
So I'm working on steganography,and one user hidden text in audio.
This text can't be readed,but there're white points,which completely shows that here exist some text information.
Some forms of steganography could add audio-frequencies which are rare/absent in speech, so will be conspicuous on a spectrogram of speech , (but could be faint/inaudible to the human-ear), i.e. you can see it, but you can't hear it.

killerguy
Posts: 10
Joined: Fri Sep 07, 2018 4:37 pm
Operating System: Windows 10

Re: steganography

Post by killerguy » Sat Sep 08, 2018 7:15 am

Hello
Did you mean changing frequencies?
Processing which for an example:
1 0 1 1 1 0 1 0 1 0
I know it. But I need advice on how to read this sentence, maybe a graphic editor?
I just can not put these white dots closer to each other for read this message. :(

Trebor
Posts: 9881
Joined: Sat Dec 27, 2008 5:22 pm
Operating System: Windows 8 or 8.1

Re: steganography

Post by Trebor » Sun Sep 09, 2018 3:21 am

killerguy wrote:
Sat Sep 08, 2018 7:15 am
I just can not put these white dots closer to each other for read this message. :(
Are you sure it has a hidden message ? ...

equally-spaced low-frequency bright-spots looks like music (drum).png
equally-spaced low-frequency bright-spots looks like music (drum).png (264.58 KiB) Viewed 5934 times

Try ... https://www.google.com/search?q=steganalysis+tools

Trebor
Posts: 9881
Joined: Sat Dec 27, 2008 5:22 pm
Operating System: Windows 8 or 8.1

Re: steganography

Post by Trebor » Sun Sep 09, 2018 10:58 am

If you're trying to create this text-on-spectrogram* effect ...

Image

see ... https://www.audiocheck.net/audiocheck_spectrotyper.php

[ * the spectrogram has to be log(arthmic) scale , not linear, for the text to be displayed correctly]
Attachments
Hello World ( text on log-scale spectrogram ).wav
(130.7 KiB) Downloaded 132 times

steve
Site Admin
Posts: 81257
Joined: Sat Dec 01, 2007 11:43 am
Operating System: Linux *buntu

Re: steganography

Post by steve » Sun Sep 09, 2018 11:32 am

This was generated with the on-line generator at www.audiocheck.net and viewed in Audacity with default spectrogram settings (https://manual.audacityteam.org/man/spe ... ences.html)
firsttrack000.png
firsttrack000.png (101.91 KiB) Viewed 5915 times
9/10 questions are answered in the FREQUENTLY ASKED QUESTIONS (FAQ)

killerguy
Posts: 10
Joined: Fri Sep 07, 2018 4:37 pm
Operating System: Windows 10

Re: steganography

Post by killerguy » Sun Sep 09, 2018 5:17 pm

Trebor wrote:
Sun Sep 09, 2018 3:21 am
killerguy wrote:
Sat Sep 08, 2018 7:15 am
I just can not put these white dots closer to each other for read this message. :(
Are you sure it has a hidden message ? ...


equally-spaced low-frequency bright-spots looks like music (drum).png


Try ... https://www.google.com/search?q=steganalysis+tools
Yes,I'm sure,stegoanalysis tools not helping,I tried any posibilities

killerguy
Posts: 10
Joined: Fri Sep 07, 2018 4:37 pm
Operating System: Windows 10

Re: steganography

Post by killerguy » Sun Sep 09, 2018 5:37 pm

Guys,here the wav file you will see original situation
https://www.dropbox.com/s/yw4vxc8s7yvj8 ... p.wav?dl=1

Trebor
Posts: 9881
Joined: Sat Dec 27, 2008 5:22 pm
Operating System: Windows 8 or 8.1

Re: steganography

Post by Trebor » Mon Sep 10, 2018 4:08 am

Shift it up by 16kHz and it's inaudible to most people ...

This is an inaudible watermark.png
This is an inaudible watermark.png (72.95 KiB) Viewed 5885 times
This is an inaudible watermark.wav
(423.42 KiB) Downloaded 170 times

killerguy
Posts: 10
Joined: Fri Sep 07, 2018 4:37 pm
Operating System: Windows 10

Re: steganography

Post by killerguy » Mon Sep 10, 2018 8:29 pm

Trebor wrote:
Mon Sep 10, 2018 4:08 am
Shift it up by 16kHz and it's inaudible to most people ...


This is an inaudible watermark.png
This is an inaudible watermark.wav
How?

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