You can’t prevent “copy on save” - that’s a feature of browsers (and other UA’s 
for the web).

Why do you care about the hash?  Why does it matter if the file is different?  

Leonard




On 4/24/15, 4:49 AM, "AndreaC." <andrea.c...@gmail.com> wrote:

>Hi all,
>This is my scenarios:
>- an user download a PDF file created by Jasper Report from system
>- the user chose to open the PDF file with the reader instead of download it
>before,
>- the browser download it on the user temporary directory
>- when the user try to save this opened PDF to an other directory a copy of
>the original file was created
>
>that is wrong on my scenario because system had recorded the HASH of the
>original PDF document on downloading
>
>To prevent this PDF-copy creation on save I adopt this workaround:
>
><pd4ml:permissions password="empty" strongEncryption="false"
>rights="34820"/>
>
>Now I have a new requirement, the user should be able to sign this PDF. 
>Unfortunately the document so created is unmodifiable and all other tried
>rights configurations except then rights="34820" lose the
>prevent-PDF-copy-on-save feature.
>
>My question is:
>exists some kind of rights configuration that maintains the
>prevent-PDF-copy-on-save feature but permit to sign the PDF document?
>
>Thanks in advance,
>Andrea
>
>
>
>--
>View this message in context: 
>http://itext.2136553.n4.nabble.com/sign-a-prtected-PDF-tp4660802.html
>Sent from the iText mailing list archive at Nabble.com.
>
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