Datacastle is a commercial software product that offers to the minute continuous online backup. All protected data is encrypted at AES 256 bit at the sub-file level in addition to encryption of file names and metadata. Keys are randomly generated and encrypted (AES 256 Bit), and can be managed efficiently across multi-tenant environments. We also offer policy driven data deletion, and device trace capability, along with data reduction features, such as single-instance-store (across encrypted data), differential backup and restore of data blocks, and bandwidth throttling. We are looking for active beta testers in exchange for free online backup services.