What is LUKS disk encryption and how can it be implemented?
Environment
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 5
Issue
- What is LUKS? cryptsetup? dm-crypt?
- What is the difference between cryptsetup plain and cryptsetup LUKS?
- What packages are required for LUKS in Red Hat Enterprise Linux?
- How can LUKS HDD-encryption be accomplished in Red Hat Enterprise Linux?
- What cipher does LUKS use to encrypt a disk?
- How big are the encryption keys LUKS uses? Can this be changed?
- Why do devices encrypted with cryptsetup use a different mode than devices encrypted at install-time?
Resolution
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Targeted solutions:
- How to configure encrypted storage with LUKS using passphrases
- How to configure encrypted storage with LUKS using exportable keys instead of passphrases
- How to add a passphrase, key, or keyfile to an existing LUKS device
- How to extend a LUKS encrypted volume
- How to extend a volgroup and filesystem backed by LUKS-formatted encrypted physical volumes
- How to change cipher, key-size, hash, master key of existing LUKS device
- How can a specific directory on a filesystem be encrypted?
- How to configure encrypted swap
- How to recover lost LUKS key or passphrase
- How to have a root LUKS partition decrypted without a password
- How to create LUKS-Encrypted image and mount it at boot
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In-depth knowledge article for additional answers:
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Product documentation references:
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