Password To Open SMS On Device

Password to open SMS on device. Why? Let's say my friend is using my PC/laptop to check his email or whatever... I suddenly receive an SMS on my phone which is then mirrored to my PC/laptop... Now, if my friend will click on the notification, he will see the message, and can even reply... which is "not' what I want... I want a feature.. in which there is a setting in Join so that one can enter a password whenever he/she receives SMS on his laptop/PC to open that SMS. Please implement it