BIP39 Seed Shuffler

This project is inspired in the awesome tool borderwallets, and the goal is to provide a simple linux commandline tool that serves as a double check of the generated grid.

This project is intended for educational purposes and is not meant to be used on any computer or device connected to the internet.

Installation:

python -m pip install seed-shuffler

or, via the git repo:

git clone https://github.com/amarjen/seed-shuffler.git
cd seed-shuffler
python -m pip install .

Usage:

☣️ Remember not to write any real seed linked to actual funds, unless it is on a trusted airgap computer and you know what you are doing. ⚠️ Don't Trust, Verify

seedshuffler --seed="own ginger excuse humble abstract always remain math solar jealous craft coach"

In order to generate a nice printable PDF from the text output we can use the legendary tools enscript and ps2pdf, eg:

export SEED="own ginger excuse humble abstract always remain math solar jealous craft coach"
seedshuffler --seed="${SEED}" > grid.txt
enscript -2r -f Courier7 -F Courier7 -j grid.txt -o grid.ps
ps2pdf grid.ps
# clean files
rm grid.pdf grid.ps grid.txt

External dependencies:

• Embit is only used to validate a bip39 seed by computing its checksum.
• The repo includes the module uheprng.py a python implementation of the Ultra High Entropy Pseudo Random Number Generator developed by Steve Gibson of grc.com. This is the PRNG that the tool uses to deterministically generate a grid from a bip39 seed.