• Diniz Martins

Steganography

Did you ever want to send a secret message to someone?

Here is a fun way to do it. You can hide a secret text message in audio file.


What do you need?

- Coagula (https://www.abc.se/~re/Coagula/Coagula.html)

- Audacity (https://www.audacityteam.org/download/) or Spek (http://spek.cc/)


Coagula is an image synth and Audacity and Spek are Spectrum Analyzers.

All are freeware!


STEP-1:

- Open mspaint.exe and set the pictures size to something like: 500 x 300 Pixels;

- Your background need to be all black;

- Draw something or type some text at the TOP of picture;

- Save your picture as a BMP file.


STEP-2:

- Import your BMP file into Coagula;

- Click on a "Render image without blue/noise" button - that will render your image to .WAV file;

- Save your WAV file.


When audio is played, it will not make any sense.

It will sound similar to Dial Up modem...


STEP-3:

- Import your audio file into Audacity or Spek;

--Into Audacity, click on a little arrow next to the files name and choose Spectogram.

(i rather Audacity...)


Now you should see your hide message:


-------


=== EXTRA @ Capture the Flag ===


Listen to the sound below and follow the instructions.

The final result is a phrase with 47 characters.


If you did it, type the phrase in the comment...

Good luck!


24 views

Recent Posts

See All

WSL | NMAP not work!

Ever since the release of the Windows Subsystem for Linux, a years long unfulfilled hope of using Nmap in this environment still lingers. You can install Nmap (sudo apt-install nmap) in Bash but when

SQLMap

SQLMap is an open source penetration testing tool that automates the process of detecting and exploiting SQL injection flaws and taking over of database servers. It comes with a powerful detection eng