![visual paradigm log in visual paradigm log in](https://knowhow.visual-paradigm.com/know-how_files/2020/05/01_login_vponline2.png)
Three "wrong password" signal cause a security procedure that block any login attempt for 12 hours(4) If the answer is "yes" then an "ok" signal is send to the now logged in user(2)(a different entity that the one which started the operation) otherwise a "wrong password" response is sent to the original user(3).
![visual paradigm log in visual paradigm log in](https://mac-cdn.softpedia.com/screenshots/Visual-Paradigm-for-UML-Enterprise-Edition_11.jpg)
#Visual paradigm log in password
I wish to draw a sequence diagram for a very classic login operation on a web site: first the user submit a form with a username and a password, the controller check if there is a registered user with that username(1) and then see if the submitted password match the one saved for the user.
![visual paradigm log in visual paradigm log in](https://online.visual-paradigm.com/images/features/sequence-diagram-software/sequence-diagram-software.png)
It's my first time working with visual paradigm and uml in general and I'm a bit confused about how I'm supposed to show certain behaviours.