Data (Information) Dispersion is a technique that is commonly used to improve data security, but without the use of encryption mechanisms.
These sorts of algorithms (IDA25 for short) are capable of providing high availability and assurance for data stored in the cloud, by means of data fragmentation, and are common in many cloud platforms. In a fragmentation scheme, a file f is split into n fragments; all of these are signed and distributed to n remote servers. The user then can reconstruct f by accessing m arbitrarily chosen fragments. The fragmentation mechanism can also be used for storing long-lived data in the cloud with high assurance.