Is it planned to add an option to the openHAB client to support client certificates for more security? Since Android 4.3 it is possible to store certificates in a secure harware store named “AndroidKeyStore”: https://developer.android.com/training/articles/keystore.html
Some time ago I create issue with similar proposition.
Well, there is yet a lot to do unfortunately for me in the app in front of this feature
There is PR with support of client certificate.
I used standard KeyChain to manage certificates.