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Shamir Secret Sharing on paper using gfshare.
.run | ||
src/paper_secret | ||
.gitignore | ||
LICENSE | ||
pyproject.toml | ||
README.md | ||
requirements.txt | ||
setup.cfg |
Paper-Secret
Shamir Secret Sharing on paper using gfshare.
Installation
gfshare
is required to split and merge the secret.
See man gfshare
for an explanation of Shamir Secret Sharing in gf(2**8).
sudo pacman -S --needed libgfshare
qrencode
and imagemagick
(convert
) are required to create and merge QR-codes during the split process.
One can set the according parameters of split_encode
to False
to skip this step.
sudo pacman -S --needed qrencode imagemagick
enscript
is required to create a PDF containing the split secret in text form.
One can set the according parameters of split_encode
to False
to skip this step.
sudo pacman -S --needed enscript
Usage
Create a secret:
cat > secret.txt
Split the secret into 5 lines:
./enpaper.py secret.txt
Manually delete up to 2 of the 5 lines in secret.txt_txt.txt
.
Then recreate the secret:
./depaper.py secret.txt.split-text.txt
Print the secret:
cat secret.txt.split-text.txt.merged.txt