Both Colosseum Online Personal and Server programs back up all data using some of the strongest encryption formats available & sends it through an Secure Socket Layer channel. All data will be compressed and encrypted with 256-bit encryption with an encrypting key selected by the user on the client-side before being uploaded and stored on Colosseum Online's backup Server. The encrypting key will never be uploaded to the backup server during backup. Moreover, uploading of backup data can be done by secure SSL channel to further increase the security and decryption is only possible with your encrypting key.
You can read more about Data Security in this whitepaper.