Source: "Interesting Links" at
https://old.reddit.com/r/termux/comments/19573gg/encryption_... ("Encryption, Decryption, Android 11 Operating System, Termux, And proot-distro Using Alpine Linux minirootfs: cryptsetup v2.6.1 And LUKS", old.reddit.com/r/termux/comments/19573gg/encryption_decryption_android_11_operating_system/).