If user use Riot on work PC - admins will can access to secret chats of user. Logout from Riot is not variant because we lost validated device. And then, when user will login again - He get new device, which need to be validated - again and again - on every day. This is not nice.
If Riot-web will have option "pin-code for enter" - this will can help user lock his Riot-web and go home. If admins will try access to users private chats in his computer on users account - they can not do this, because they do not know "pin-code" for enter riot-web.
At next work day user will open riot-web, enter his pin-code and get access to his secret chats.
If user use Riot on work PC - admins will can access to secret chats of user. Logout from Riot is not variant because we lost validated device. And then, when user will login again - He get new device, which need to be validated - again and again - on every day. This is not nice.
If Riot-web will have option "pin-code for enter" - this will can help user lock his Riot-web and go home. If admins will try access to users private chats in his computer on users account - they can not do this, because they do not know "pin-code" for enter riot-web.
At next work day user will open riot-web, enter his pin-code and get access to his secret chats.