Android app for RSA encrypted communication Key size used is 2048 and it is changeable in the code. That key size limits the max message size to about 250 characters which produces a warning color when typing a new message in the app.

#PHP files for communication with MySql not included

#Create the database (MySql) create table whiteboard (id, message text, signature text, timestamp text); simple table using text type variable

#References that helped with Android and PHP code https://easyway2in.blogspot.gr/2015/07/android-mysql-database-connect.html https://www.androidpit.com/forum/563823/get-data-from-mysql-and-put-it-in-android-listview https://codeoncloud.blogspot.gr/2013/07/android-mysql-php-json-tutorial.html