eXORdia

Check the online JS demo at Github Pages.

This will be a simple python library called exordia, which relies on using XOR operations to split a file into N encrypted shards. The name is a reference to the Yu-Gi-Oh! card Exodia the Forbidden One, which is split into 5 pieces.

The method is simple:

Split

• Generate N-1 random files
• Generate a file by XORing all the random files plus the original one
• The N generated files are the shards

Merge

• XOR the N random files

Usage

Ideally, the installation will be as simple as

pip install exordia

And the usage will be like:

from exordia import split, merge

# split
split(input='secret.png', n=5)

# merge
merge(shards=['secret.png.1', 'secret.png.2', 'secret.png.3', 'secret.png.4', 'secret.png.5'], output='secret.png)

Future work

Some future work might be required to add optional features like:

• GZipping the files before splitting
• Adding a EOF signature and a random padding, to avoid guessing the compressed filesize
• Adding some verification CRC to ensure the merge was correct