[gopkarthik]

Fun repo that uses the Shamir Secret Sharing Scheme to break a file into parts which can be recombined to get the original. From the README

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

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.

[xpe]

And for people who are confident that the some compatible horcrux tool is still available.

[kuchenbecker]

Store it with the files