S4 utilizes Tahoe-LAFS to securely store data on Amazon S3. You can access S4 using the Gridsync applications or a Command Line Interface. We recently added the Magic Folders features to Tahoe-LAFS.
Tahoe-LAFS, the Least Authority File Store, is a free and open-source cloud storage system with verifiable end-to-end security. We use Tahoe-LAFS to provide client-side encryption and other features for our Simple Secure Storage Service (S4). This means you don’t have to rely on storage servers to provide confidentiality and integrity of your data.Tahoe-LAFS Website
This comic explains our Simple Secure Storage Service (S4) works compared to other cloud storage options. This short series of illustrations was done by Sam Hester from The 23rd Story.
Magic Folders is a file-syncing utility that automatically keeps a folder’s contents up-to-date across multiple devices in our Simple Secure Storage Service (S4).Magic Folders Blog Post
Magic Wormhole allows us to send configuration information from our Simple Secure Storage Service (S4) to the Gridsync application with the invite code and supports sharing files and folders in Gridsync.Magic Wormhole on GitHub