Tarsnap encrypts the data on the client side[0]. The source is open, and signed with PGP. The data ends up being stored on S3, but the location doesn't matter

Tarsnap encrypts the data on the client side[0]. The source is open, and signed with PGP. The data ends up being stored on S3, but the location doesn't matter. [0] https://www.tarsnap.com/crypto.html https://www.tarsnap.com/crypto.html