Lock fields after digital signature

Hi everyone,

I worked on Adobe Acrobat Standard DC and i have edited a form with the "prepare form" tool.

My form is 5 pages long, and there are several check boxes options, text fields and 6 digitales signatures fields.

My problematic is that i want to mark as read-only the fields that the person has completed after his digital signature.

I don't want to use the option mark as read-only --> just theses fields because when someone will sign the form, he will not completed the same fields from one request to another.

So my question is : is it possible to add a script  on the proprieties of a digital signature field that make theses actions :

When a person signs the digital signature field, all the other fields in the document that contain a value and are not already read-only became read-only.

Thanks in advance for your answer,

Best regards, Romain