[HarryEngineer]

Originally Posted by DNSB

The Sony DPT for one had encryption. The corporate ecosystem demanded that.

Kobo's PIN access does some of what the OP wants for access control but there is no encryption of content done. The Sage and Elipsa are about the only Kobo devices that have enough CPU power to make encryption doable.

Do you recall which DPT? The older or newer?

Originally Posted by Aleron Ives

Kobo devices use a stripped-down version of Linux. You can't encrypt anything.

as its linux based it should be possible.

Originally Posted by DNSB

For what it may be worth, you could, in theory, use ext4 FBE or LUKS on a Kobo ereader. As to whether it would be worthwhile considering the extra CPU load is up to the user (performance hit is >50%).

I was thinking LUKS, apparently some attack vectors are possible in ext4 FBE via access to parts of the unencrypted config/operating system/files, etc

If you say it should be do-able on an elipsa, then the 2E should be even moreso?


Taken from the LUKS wikipedia https://en.wikipedia.org/wiki/Linux_Unified_Key_Setup

On mobile Linux systems, postmarketOS has developed osk-sdl to allow a full disk encrypted system to be unlocked using a touch screen.
https://wiki.postmarketos.org/wiki/Osk-sdl

May offer another avenue