Printing Invalidates Digital Signature


D

dl270a

In a Word document (Word 2007) I inserts a digital signature with a JPEG of
my signature.
I Save-as a new document.
I print the document.
However as soon as I print it, the digital signature is marked "Invalid
Signature".
Why and what is the work around?
 
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J

Jay Freedman

dl270a said:
In a Word document (Word 2007) I inserts a digital signature with a
JPEG of my signature.
I Save-as a new document.
I print the document.
However as soon as I print it, the digital signature is marked
"Invalid Signature".
Why and what is the work around?

Most likely you have one or more fields in the document, and the "Update
fields before printing" option is checked in the Word Options > Display
dialog. If the updating of the fields causes any change in the content of
the document, the digital signature (which is a mathematical function of the
document content) is no longer valid.

Try unchecking that update option.

--
Regards,
Jay Freedman
Microsoft Word MVP
Email cannot be acknowledged; please post all follow-ups to the newsgroup so
all may benefit.
 
D

dl270a

Thanks for the reply
The Updating Fields Before Printing option is already unchecked. So it must
be something else. Any ideas?

Jay Freedman said:
Most likely you have one or more fields in the document, and the "Update
fields before printing" option is checked in the Word Options > Display
dialog. If the updating of the fields causes any change in the content of
the document, the digital signature (which is a mathematical function of the
document content) is no longer valid.

Try unchecking that update option.

--
Regards,
Jay Freedman
Microsoft Word MVP
Email cannot be acknowledged; please post all follow-ups to the newsgroup so
all may benefit.


Thanks for the reply
The Updating Fields Before Printing option is already unchecked. So it must
be something else. Any ideas?
 
J

Jay Freedman

Do you have any add-ins that might be changing the document just before
printing? The main clue is that the digital content of the document is being
altered somehow.

Other than that, I don't know of anything else.
 
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D

dl270a

The only add-in that is active, according to Word, is the "Person Name
(Outlook e-mail recipients) add-in.

I have a PDF printer installed and use the "Save as PDF or XPS" function
quite a bit. But this particular document was printed to a PCL 6 laser
printer not to PDF.

Any other idea's?

Thanks.
 

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