Duplicati is the software to choose when you need to back sensitive data online. And by online storage we mean cloud services and remote file servers, out of which we bring to your attention the following: SkyDrive, Google Drive, SSH, FTP and more.
These backups will be encrypted and compressed. The built-in AES-256 encryption algorithm will have to be signed under GNU Privacy Guard.
In addition to safety, your files will always by up to date. Images, documents and entire folders can be uploaded to an online cloud service through this backup utility. By incremental backups, bandwidth and space are saved, as only changed parts will be transferred.