This standard specifies elements of an architecture for cryptographic protection of data on block-oriented storage devices, describing the methods, algorithms, and modes of data protection to be used. This standard defines specific elements of an architecture for cryptographically protecting data stored in constant length blocks. Specification of such a mechanism provides an additional and improved tool for implementation of secure and interoperable protection of data residing in storage. New IEEE Standard - Superseded. This standard specifies cryptographic transform and key archival methods for protection of data in sector-level storage devices.