Hi all,
I have a problem about signing a signed pdf.
- starting from a valid signed pdf. Signature covers whole document.
- sign this pdf applying an image on a text field(there is a reason to do
this). The signature is applied on a signature field
- when I open the signed pdf I find that the
The first signature is not invalidated, it's just Acrobat 's way of
saying it's not the last. I think Acrobat started behaving like this
in 8. If you extract the first revision it will still verify ok.
Paulo
On Fri, May 17, 2013 at 8:26 AM, twain ant.mari...@gmail.com wrote:
Hi all,
I have a
You have modified the original document, thus it's signature is no longer
valid (trustable).
Leonard
On 5/17/13 10:46 AM, Paulo Soares pgpsoa...@gmail.com wrote:
The first signature is not invalidated, it's just Acrobat 's way of
saying it's not the last. I think Acrobat started behaving like
Ok,
but what about the meaning of revision?
If I sign a pdf than I cannot modify it, and it doesn't matter if I create a
new revision.
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You can always modify a non-encrypted/secured PDF. Signing a PDF doesn't
prevent modification, it simply enables the ability to DETECT modification.
Leonard
On 5/17/13 11:01 AM, twain ant.mari...@gmail.com wrote:
Ok,
but what about the meaning of revision?
If I sign a pdf than I cannot
I'll try to explain better my situation.
About Michael doc: I never used certification signature but only approval
signature.
So I never set any level to prevent modification.
About Leonard reply: the problem is that, even if I used a new revision,
Acrobat complains that the first signature is
Sorry,
I read the latest doc from Michael after my previous reply.
Ok, so this doc says that if I have a pdf signed with approval signature I
cannot modify it page contents.
So revision is useless in this case.
Thank you.
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If you don't use a certification signature, then you aren't stating any
rules for modification - which is considered to mean NO modifications.
So if you modify the document after signature, then it's invalid. Clear?
If you wish to allow certain types of modifications after signing, then
you need
