Hi,
We published on our GitHub account [1], a new documentation about adding a SecurityManager [2] to a multi-sandbox platform [3].
The MicroEJ Team
[1] https://github.com/MicroEJ/How-To/tree/master/Multi-App-Security-Manager
[2] https://developer.microej.com/javadoc/microej_4.1/foundation/java/lang/SecurityManager.html
[3] https://developer.microej.com/glossary.html#microejmultifirmware