horcrux
Split your file into encrypted horcruxes so that you don't need to remember a passcode
How it works
horcrux has two commands, split and bind.
Splitting
If I have a file called diary.txt in my current directory I can call
horcrux split diary.txt
and it will prompt me for how many horcruxes I want, and how many will be needed to resurrect the original file. For example I might want 5 horcruxes with the ability to resurrect the file if I have any 3. The horcrux files will be created like so:
diary_1_of_5.horcrux
diary_2_of_5.horcrux
...
Now you just need to disperse the horcruxes around the house on various USBs or online locations and hope you can recall where they all are!
Binding
To bind the horcruxes back into the original file just call
horcrux bind
in the directory containing the horcruxes (or pass the directory as an argument).
Installation
via homebrew:
brew install jesseduffield/horcrux/horcrux
via binary release
Who this is for:
- People who need to encrypt a big sensitive file like a diary and don't expect to remember any passwords years from now (but who paradoxically will be capable of remembering where they've hidden their horcruxes)
- People who want to transmit files across multiple channels to substantially reduce the ability for an attacker to intercept
- People named Tom Riddle
FAQ
Q) This isn't really in line with how horcruxes work in the harry potter universe!
A) It's pretty close! You can't allow any one horcrux to be used to resurrect the original file (and why would you that would be useless) but you can allow two horcruxes to do it (so only off by one). Checkmate HP fans.
Q) How does this work?
A) This uses the Shamir Secret Sharing Scheme to break an encryption key into parts that can be recombined to create the original key, but only requiring a certain threshold to do so. I've adapted Hashicorp's implementation from their vault repo