US Patent 9152578 Securing data replication, backup and mobility in cloud storage

A technique secures data in cloud storage. The technique involves receiving, by processing circuitry, an input/output (I/O) request which includes host data. The technique further involves encrypting, by the processing circuitry, the host data to form encrypted data and sending a block-based write transaction which includes the encrypted data to a replication storage array to store the encrypted data within the replication storage array. The technique further involves storing, by the processing circuitry, the host data within the production storage array. The encrypted host data is stored within the replication storage array to secure the host data which is also stored at the production storage array.