When researching why my encrypted messenger app would not work on Nougat I found this document that describes the breaking change and it's reasons along with some technical info on encryption using passwords. This had not meaning for me as I don't use Passwords. The document does not offer any complete examples on what to do so I began looking all over for what to do.
My research led me to this post. The answer to the post works but I have no idea why. Furthermore the last comment says . . . "At least this can be a quick-fix before actually going on the recommended way"
What is the "recommended way?" Are there any working examples anywhere on the recommend way?