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Encryption mode, or mode, for short, is an algorithm that features the use of a symmetric key block cipher algorithm to provide an information service, such as confidentiality or authentication.
XTS
XTS mode is in fact XEX mode, which was designed by Phillip Rogaway in 2003, with a minor modification (XEX mode uses a single key for two different purposes, whereas XTS mode uses two independent keys). In 2010, XTS mode was approved by NIST for protecting the confidentiality of data on storage devices. In 2007, it was also approved by the IEEE for cryptographic protection of data on block-oriented storage devices (IEEE 1619).
XTS mode is designed specifically for applications working on disk sector level and is more secure than other popular modes (like CBC and LRW modes).
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