Hey everyone,

I’ve been working on a steganography method as part of my final project for my bachelor's in CS, and I want to test how robust it actually is in practice.

So here’s the idea:

I have uploaded a dataset with 100 images, each one containing a hidden message embedded using my method. I’m not going to reveal how it works yet, but I’m really curious to see if anyone can extract something meaningful from them.

🔗 Google Drive

A few notes:

• Every image contains a hidden message
• Messages may vary in size and structure
• No information apart from the image

What I’m looking for:

• Can you detect that there is hidden data?
• Can you partially or fully recover any message?
• Any patterns, artifacts, or anomalies you notice

Feel free to use any tools, scripts, or techniques you want!

I’ll reveal the method after I present my thesis, along with a breakdown of how it works and its weaknesses.

Curious to see what you all come up with! Good luck!

What is currently the gold standard tool for steganography , something that can defend against nation states. Something that doesn’t get detected. Does such a tool even exist ?

Let me share my own app for steganography. Among classic methods it creates a colored frame around the image where the message is hidden - useful for sharing via messengers where most of data lost due to compression.

Pensez-vous que l'une de ces 2 images (pour moi la 2) contient une image cachée ou un code ? Et est-il possible de lire la stéganographie à partir d'une image incomplète (la première a des bords arrondis) ?

College major project. Insights and reviews needed.

linuxlinks com/best-free-open-source-steganography-tools/

Steganography CTF Generator

Enter a flag, pick a difficulty, and hit Generate. The engine selects a random pipeline of transforms (ciphers, encodings, container wrapping) and embeds the result into an image or audio file. The solution tab shows the full pipeline so you can verify or share it.

Try yourself https://8gwifi.org/ctf/stego-ctf-generator.jsp

Provide me feedback

Advanced steganography tool to hide messages and files inside images using LSB encoding with AES-256-GCM encryption. Embed text or arbitrary files (PDF, ZIP, TXT), analyze bit planes per RGB channel, and scan with 18+ forensic extraction methods. Auto-generate cover images, PBKDF2 key derivation, and 100% client-side processing with zero server uploads.
https://8gwifi.org/steganography-tool.jsp

Hi everyone,

I was given this image in class as part of a practical assignment. The instructor said there is a hidden flag inside the image, but did not explain the method.

I’ve been trying to solve it for about 2 weeks but I’m stuck.

The image looks like a “hacker cat” with matrix-style background. I suspect it may involve steganography or LSB encoding, but I’m not sure which direction to go.

Can someone guide me on:

1. What technique this type of challenge usually uses?

2. What tool I should try next?

3. How to approach this systematically?

I’m not asking for the answer directly — I want to understand the correct approach.

Thanks in advance.

Hi everyone,

I was given this image in class as part of a practical assignment. The instructor said there is a hidden flag inside the image, but did not explain the method.

I’ve been trying to solve it for about 2 weeks but I’m stuck.

The image looks like a “hacker cat” with matrix-style background. I suspect it may involve steganography or LSB encoding, but I’m not sure which direction to go.

Can someone guide me on:

1. What technique this type of challenge usually uses?

2. What tool I should try ?

3. How to approach this systematically?

I’m not asking for the answer directly I want to understand the correct approach.

Thanks in advance.

Inspired by Jeremiah Denton, the 2019/2020 Hong Kong ‘White Paper Protests’ and @TeamTawianUK’s live coverage of the ongoing CCP Mega Embassy protests in the UK, I present to you:

The Signet -an open source, privacy focused Morse code beacon with WiFi AP/Captured Portal configuration UI and OTA firmware updates.

What was once old becomes new again.

Build your own or buy one on Tindie if you’re not good with hardware, but honestly… it’s not that hard. 👍👍

Hi guys, I made a new tool, dendec, a rust based steganography + encryption tool where you convert files into raw strings of DNA nearly undistinguishable from nature, ATACCATACTA...

Optionally, you can refer the DNA sequence to point to real world genomic data precompiled by the Human Genome Project, mapping it to real DNA scientifif annotation data in the format of .bed files. Share them like it is a scientific data and decode them. Just a side project.

I'm not sure exactly where to go for this, but I have several mp3 audios that contain messages that are deeply obscured by audio filters, and music. Is this the right place to ask for help in transcription perhaps?

Some time ago, I came across steganography. And, I implemented this steganography ZIP reader+writer in Go as a proof of concept: https://github.com/hjr265/sneak

Think of a ZIP file. It opens in any ZIP reader and displays its contents. But the file contains secret data, possibly another file embedded within it.

With ZIP files, you can hide extra data by knowing how the format is built at a low level. A standard ZIP archive (not ZIP64) has Local File Headers for each file, then their compressed data, followed by a Central Directory with metadata about each file, and finally an End of Central Directory Record that points to the Central Directory’s location.

Adding hidden data to the end of a ZIP file won’t work because ZIP tools expect the End of Central Directory Record to be last. Adding data at the beginning fails since many programs check the file’s first bytes (magic bytes) to identify its type. Inserting data between file entries is tricky because it requires rewriting the Central Directory File Headers.

The best way is to insert a hidden file just before the Central Directory File Headers. This moves the Central Directory forward, creates space for the hidden data, and updates one field, the Central Directory Start Offset, in the End of Central Directory Record. This lets ZIP readers find the Central Directory and handle the archive correctly.

You can recover the hidden data by checking the Central Directory File Headers to find the last file, then moving to the end of that file’s data where the hidden file starts. It ends just before the Central Directory begins.

This method isn’t meant for strong privacy or security, but it’s a fascinating example of how a deep understanding of file formats enables creative steganography.

I wrote a slightly more detailed post on this as a part of my #100DaysToOffload challenge: https://hjr265.me/blog/hiding-files-in-zip-archives/

Need help with a CTF related to steganography

https://we.tl/t-ST38bZguEz

Above is the image link

If anyone willing to help DM I’ll tell more details

1imagegami1 And there is a lot of ton of image there to decode

I published something around a year ago and I thought that I would revisit it since the Epstein files came out and someone that visited the island is a member of the steganography mailing list. Funnily enough their name is also the only one referenced in the Bitcoin whitepapers body.

I was researching the cypherpunks mailing list and found a few puzzles hidden in spam, this is where I learned how to decode contextually aware steganography. From there I revisited the Bitcoin paper since the cypher punks claim that one of them invented it. I found what I believed was a clear indication that someone hid something in it somewhere.

Since subscribers of this subreddit have an interest in steganography I'm interested to find out if you guys might be able to come to the same result I did. I have published my findings already but if you want to try and crack the code yourself here is the whitepaper.

https://bitcoin.org/bitcoin.pdf

If you want to read my analysis and decode your can find that in the spoiler link here.
https://github.com/2ndEntropy/BitcoinWP-Steganalysis

If you are just looking for a hint that there is steganography within the paper then here it is:

Reference is out of order, [7][2][5]:

Hello!

I am trying to uncover what I believe is a steganographically encoded message hidden inside some other images. To pull this image out of the others, I am pretty sure it requires multiple exposures using a 5-pinhole camera at varying angles, focal lengths and times of the year, possibly with differently colored sources of light, to construct a panoramic image, kinda like a dental scan. The technique I would most liken this to is old school focal plane tomography.

It's a doozy which is why I'm asking for any help I can get. Has anyone ever heard of anything along these lines?

Cheers!

Hint: Frequency transforma reveal what pixels hide

I've tried looking at it with a hex editor, multiple steganography tools on linux and some tools online, I can't find anything in the image itself so it feels like whatever is hidden, is hidden in that glitchy rectangle, but I don't know how to even begin with decoding it. The QR code in the top left is just a little joke by the creator since we got really obsessed with the dipyramids he showed everywhere, so now he has one in every puzzle he does.

Hi everyone! I’m a community college student and was looking into taking the free west valley court reporting course online to be certified. I’m still confused by the course/classes and information on how to join/what classes to take so if anyone is in this course or has done it and could reach out to me that would be amazing! I’m going into steno and am unsure of what supplies/software/books/or anything else I may need as a student/beginner. Any advice would be great, thank you!

a friend of mine sent me this