When comparing dm-crypt via LUKS vs GNU Privacy Guard, the Slant community recommends GNU Privacy Guard for most people. In the question“What are the best file encryption tools?” GNU Privacy Guard is ranked 1st while dm-crypt via LUKS is ranked 6th. The most important reason people chose GNU Privacy Guard is:
GPG works on OS X, Linux, and Windows with [extensive selection of wrappers](https://www.gnupg.org/related_software/frontends.html).
Ranked in these QuestionsQuestion Ranking
Encrypt whole disks, removable media, software RAID, partitions, files and logical volumes.
Pro Native Linux support
It offers the best integration and ease of use on Linux.
Pro Free and open-source
Open-source for cryptography is a requirement, not just a bonus.
Pro Support for multiple keys/passwords
If several people should be able to decrypt a volume, each one can have their own password/key.
GPG works on OS X, Linux, and Windows with extensive selection of wrappers.
Pro Open-source and battle-tested
GPG is the oldest and most reliable encryption software available.
Pro Multiple types of encryption algorithms
GPG supports public key cryptography (RSA EIGamal, DSA), symmetrical key algorithms (Blowfish, AES, IDEA, etc), cryptographic hash functions (RIPEMD, SHA), and compression (ZIP, ZLIB, BZIP2).
Pro Volume and individual file encryption
With GPG you can encrypt you whole volume or files individually.
Pro Supports paired keys
Allows for encrypted communication.
Pro Supports expiring signatures
GPG keys by default expire after a set amount of time. The amount can be changed and this feature can be turned off.
Pro Both CLI and GUI versions available
GPG can be installed as a command line tool, or you can choose between several different GUI frontends available for it.
Con Requires advanced command line knowledge
In order to use dm-crypt you need to have advanced knowledge of Linux and of the command line, as well as the Linux filesystem.
However, most distros support easy creation of LUKS-encrypted drives when installing Linux transparently.
Con It may be hard to find a GUI frontend that suits your needs
If you decide not to use the CLI version of GPG, it may be hard to find a GPG GUI version that suits your needs simply because of the sheer number of different versions available.