“Tarsnap is a secure, efficient online backup service:
- Encryption: your data can only be accessed with your personal keys.
We can’t access your data even if we wanted to!
- Source code: the client code is available.
You don’t need to trust us; you can check the encryption yourself!
- Deduplication: only the unique data between your current files and encrypted archives is uploaded.
This reduces the bandwidth and storage required, saving you money!
Tarsnap runs on UNIX-like operating systems (BSD, Linux, MacOS X, Cygwin, etc).”