How to secretly travel with bitcoin using Steganography
This piece walks a user through how to discreetly travel with bitcoin, or any piece of information they wish to keep private, using steganography. This technique eliminates the human error involved with using a brain wallet (simply memorizing your seed phrase).
What is Steganography?
Steganography, as it applies to computing, is the process of concealing a sensitive file or message within another ordinary file (be it a plaintext file, image, video, or sound file).
A bitcoin holder’s use case for Steganography
This piece examines how one can use Steganography techniques to obfuscate sensitive information such as a bitcoin seed phrase or private key using nothing more than standard tools. The technique discussed involves hiding a bitcoin seed phrase within a photograph in a user’s camera roll (a plain picture from a vacation). Memorizing a seed phrase, writing the seed phrase on paper, and/or carrying a hardware wallet are not necessary in this case. This is ideal for an OPSEC conscious bitcoin holder or anyone operating in an adversarial environment.
Required Tools
To follow this tutorial, you will need a bash shell or terminal emulator.
If you are not using a Linux computer the following are available:
- Windows users: install BASH FOR WINDOWS
- Mobile users: download ANDROID on F-Droid (do not use the Google play version of , it is broken and not updated!)
STEP 7: Copy the seed phrase down on a piece of paper and then delete the plaintext file containing this information to preserve your secrecy.
STEP 8: Download a bitcoin wallet (ideally through F-Droid or direct APK download) and load the seed phrase into it. Now you can proceed to spend and receive bitcoin normally.
And that’s it! This method requires nothing besides a few standard tools and some patience. As for use cases outside of bitcoin seed phrases and private keys…your imagination is the limit!
Final thoughts
To recap, Steganography is a form of cryptography that allows anyone to conceal a sensitive piece of information within an ordinary file (be it a plaintext file, image, video, or sound file).
This technique is best for those who are extremely OPSEC conscious or operating in an adversarial environment. Regardless, this technique has many use cases and is a good skill to master.
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