* Package name    : shufflecake
  Version         : 0.6.0
* URL             : https://shufflecake.net/
* License         : GPLv2
  Programming Lang: C
  Description     : plausible deniability for multiple hidden filesystems

 Shufflecake is a tool that allows the creation of multiple hidden volumes on
 a storage device in such a way that it is very difficult, even under forensic
 inspection, to prove the existence of such volumes.
 .
 It contains a kernel module and a userland command line tool

This can be considered as a spiritual successor of TrueCrypt/VeraCrypt,
with a permissive license and a pathway to mainline. It is filesystem-agnostic
and works OK on my machine. Shufflecake is still experimental and
packaging work in ongoing, feedbacks more than welcome:

https://salsa.debian.org/yifei/shufflecake