cryptsetup - 2:2.3.7-1+deb11u1 main

Cryptsetup provides an interface for configuring encryption on block
devices (such as /home or swap partitions), using the Linux kernel
device mapper target dm-crypt. It features integrated Linux Unified Key
Setup (LUKS) support.
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Cryptsetup is backwards compatible with the on-disk format of cryptoloop,
but also supports more secure formats. This package includes support for
automatically configuring encrypted devices at boot time via the config
file /etc/crypttab. Additional features are cryptoroot support through
initramfs-tools and several supported ways to read a passphrase or key.
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This package provides the cryptdisk_start and stop wrappers and
luksformat.