website shield emblem at bottom of website

I see that some website add a security shield that gives a status of the customer or the protection of a website. I am not sure exactly what they are called or how they are controlled. I would like to add a shield based on the type or status of customer. I would need to control the use of from my source such as if the customer is not validated to have the shield or lowers his/her standard, the we monitor and change that shield. The customer only must add the code but not allowed to change the shield. Is there any code or software that would allow me to do this?