Longaccess

Longaccess purports to be a cloud filesystem that will last for the long term, like for decades at least. Whether it lives up to this won't be known for decades at least. It stores files in an encrypted manner that is retrievable using a key which you can print out and keep in a safe place in case all your local digital files go away.

Links

 * Official site
 * Downloads
 * Developer blog
 * Github