Download the latest version (v1.1.1)

🧅 KodeKTep - Encryption

"Not everything that looks like a PDF is just a document."

KodeKTep is a file encryption and stealth packaging tool. Created for those who value true privacy, digital disguise, and content security.

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🔐 What does KodeKTep do?

• Encrypts the contents of any file (text, image, spreadsheet, code, etc.)
• Merges the encrypted result into a base file (like a PDF, image, or executable)
• Produces a perfectly functional file that appears normal but contains hidden content
• Generates a .keys file containing the decryption metadata, essential for recovering the original content

With this, you can hide:

• An executable inside an image
• A video inside a .txt file
• A secret document inside another PDF
• Or even a photo inside another photo—keeping the host file fully operational

KodeKTep Particularities: KodeKTep is not just an encryption tool — it's an oracle of silent chaos.

Its layers go beyond traditional protection, offering mechanisms that confuse, delay, and disorient reverse engineering attempts. Some of its unique characteristics include:

• Multi-layer dynamic encryption (cryptographic matryoshka)
• Embedded fake digital signatures (real file headers)
• Intelligent honeypots with randomized encrypted data
• Preservation of the original host file’s date and timestamp

What appears to be, often isn’t. Silence is a language.

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📦 What does this repository contain?

At this stage, we're releasing only the Windows executable GUI and CLI (kodektep.exe, kodektep-cli.exe). Future versions for Linux will be added soon.

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🚀 How to use

🧪 Encrypting a file

1. Run kodektep.exe
2. Select mode: Encrypt
3. Choose the file you want to protect (e.g., image.jpg)
4. (Optional) Select a base file (e.g., document.pdf) to host the hidden data
5. Click Run
6. The program will generate:
   • A new file with _oc suffix (e.g., document_oc.pdf)
   • A .keys file (e.g., document_oc.pdf.keys) essential for decryption

If no base is used, the output file will have the .ocpher extension

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🧹 Decrypting a file

1. Run kodektep.exe again
2. Select mode: Decrypt
3. Choose the previously generated file (e.g., document_oc.pdf)
4. Ensure the corresponding .keys file is in the same folder with the same base name
5. Click Run
6. The original file will be restored with its name + +KodeKTep (e.g., image+KodeKTep.jpg)

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🛡 About security

• Without the .keys file, decryption is mathematically infeasible
• Each operation generates unique and random AES keys and IVs
• The final file is fully functional (opens like a normal file) but secretly contains hidden data

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📌 Important Notes

• The project is not yet open-source, but partial release may happen later
• Your security depends on the preservation of the .keys file. If lost, the content is irretrievable

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📬 Contact

This project was created by Paulo Sergio Durco (@psdurco)

If you’d like to collaborate, test future versions, or support the project, feel free to open an issue or reach out (link coming soon).