To change your password, go to your Virement Maitrisé space and click on 'Profile' in the left menu bar. Select the 'Password' tab. Then fill in the form with your current and new passwords. It must contain :
One lower case letter
An upper case letter
A number
A special character
Minimum 8 characters in total
Click on 'Change password'. You will then be logged out and have to authenticate yourself again with your new password.