With last update vor Lotus Traveler 8.5.2.2 there came a new feature for
Android devices. You can read and send encrypted mails and you can sign
mails with your notes id.
You can click on details in new mails, there you find the new checkboxes
for encrypt or sign.
Long needed feature and it works better than Lotus Companion App on
iPhone, because the id password is cached for a short time.

Update
After some testing i wrote down some points on this new feature.
First of all i asked me, why i didn’t read anything about it. I found
no document on IBM, which announces encryption on Android before 8.5.3.
On my search i found a
post
in the Domino 8.5 Forum
, which describes the new feature too. So why
did nobody blog or announce it?