CrowdSteg

Cryptography | Medium - CrowdSteg

Challenge

We have recieved an image that is hiding something. See if you can find the secret.

Download Image

Solution

Solution Guide

This is a steganography challenge. There are many tools for steg challenges and usually involve trial & error. This particular challenge cannot be solved online and needs a downloadable tool: Digital Invisible Ink Toolkit (DIIT) which can be downloaded here: https://diit.sourceforge.net/download.php. Once downloaded, double click diit.jar to open it. It works for Windows, Linux, and Mac OSX.

warning

You need to have Java 1.5+ installed on your computer for the program to run!

Once it is open, head to the Decode tab. Click Get Image and choose the image you downloaded for the challenge (crowdsteg.png). Then, click Set Message and enter any filename (.png extension) in your chosen location, this will be the extracted output file. Your next step will be to attempt every algorithm from the dropdown menu until one of them succeeds. Once it's succeeded, simply find and open your extracted image to get the flag!

Credits

• Author(s): Divesh Gupta (legendile7)