What happen the permitted actions, "No changes allowed" after Digital ID expired? (Acrobat Pro DC)

[#1]

I need to add "Certify (invisible Signature) on public documents, so it doesn't allow anybody to edit, but view. I noticed that digital ID expires in 5 years and it can't be changed 5 years to never expired. 

After the digital ID is expired in 5 years, does it allow anybody edit the document?

[#2]

I need to add "Certify (invisible Signature) on public documents, so it doesn't allow anybody to edit, but view. I noticed that digital ID expires in 5 years and it can't be changed 5 years to never expired. 

After the digital ID is expired in 5 years, does it allow anybody edit the document?

[#3]

You should be able to extend its life if that is what you're worried about. But from what i understand this shouldn't be a problem unless you clear that signature and try to apply that expired certificate.

Also, Check the guidelines of the certificate issuer. The certificate authority that produces these certificates may have additional information in this regard.

Is this a self-signed certificate?

[#4]

Thank you for your reply, Is_rbls.

Yes, it's a self-signed certificate.

I'm wondering if the document is still not editable or not if I don't extend its life after the certificate expired, 

[#5]

I think that what you're concerned about has to do  the certificate revocation and trust status after it expires. And possibly getting signature validation errors if that document is opened at a later time that is past the end of life for the certificate that was used to sign that document, correct?

I don't think that is a problem since  the Adobe Acrobat's default signing method ("Adobe Default Security") will validate that digital signature against the timestamp that was created with at signing time.

If this is what you're inquiring about here's a very good technical explanation that I found: 

• https://superuser.com/questions/459985/need-a-solution-to-verifying-expired-digital-signatures

In fact, if you go to Edit--->>>Preference--->>> Signatures --->>>"Identities & Trusted Certificates" --->> you can check the details of such self-signed certificate through  "Windows Digital IDs" or even in the "Trusted Certificates" section(s).

To backup what I'm saying , in the "Digital ID and Trusted Certificate Settings" dialogue box, left-click once with your mouse pointer on your self-signed certificate provided in the list, then above that,  click on the "Certificate Details" tab.

In the next dialogue box that will open ("Certificate Viewer"), click on the "Revocation" tab and see below the notice that is  displayed in the  "Details" section.  See slide below:

[#6]

Thank you so much for all your informaiton!! I appreciate your help! 🙂