Cannot edit Document Security after signing

[ricardob95913553]

Hello to everyone!

I have a signed document and I want to change the security in order to protect it from copying and editing (but with no password).

When I click to change security parameters, I get the following message:

"You cannot modify the security of this doccument because it is already signed"

What can I do?

Thanks,

RIcardo Blanco

[margueritek]

A digital signature captures the hash of all of the bytes in the file. If you encrypt a file, those bytes will change. You can encrypt first, then sign.

[try67 · Accepted solution]

That's expected behavior. The digital signature is supposed to lock the file from further edits.

[margueritek]

Yes, but that's not why you can't encrypt after signing. Initial encryption requires a Full Save, and that would break any digital signature. The digital signature after encryption adds an encrypted incremental save section. On an initial Save and Sign, the encryption is applied during the signing process.