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The Linux Unified Key Setup or LUKS is a hard disk encryption standard for Linux created by Clemens Fruhwirth.

While most disk encryption software implement different and incompatible, undocumented formats, LUKS specifies a standard on-disk format for use in various tools. This not only facilitates compatibility and interoperability amongst various different software, but also assures that they all implement password management in a secure and documented manner. The reference implementation for LUKS works on Linux and is based on an enhanced version of cryptsetup, using dm-crypt as the disk encryption backend.

LUKS has been designed to conform to the TKS1 secure key setup scheme.
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