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How to prevent others from editing profile of stamp to someone else's name

New Here ,
Apr 29, 2021 Apr 29, 2021

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Hi -

I send a file to approvers using "send comments via email" option. When they receive the email, they open the file, then place a green "approved" stamp on the document, which shows their names, dates and times. However, we found out the approvers can edit the identy of the stamp, so they can change the name on the stamp to be someone else. There is even a way to change the property of the comment so it shows the same someone else made the comment. 

Is there anyway for me as the ower of the file to prevent those approvers to edit the identity of the stamp and change the property of the comment? 

I'm looking for a secure way to obtain approvals, and would like to use the stamp function, not the digital signatures. 

Thanks so much!

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Adobe Community Professional ,
Apr 29, 2021 Apr 29, 2021

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You can't prevent this. 

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Adobe Community Professional ,
Apr 29, 2021 Apr 29, 2021

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While you can't really prevent it, you can make it more difficult for users who don't know what they are doing. And you can absolutely set it up so that you can tell if the doc has been tampered with. 

Thom Parker - Software Developer at PDFScripting
Use the Acrobat JavaScript Reference early and often

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New Here ,
Apr 29, 2021 Apr 29, 2021

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How do you set it up to know if it has been tampered with? 

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Adobe Community Professional ,
Apr 29, 2021 Apr 29, 2021

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See my answer below

 

Thom Parker - Software Developer at PDFScripting
Use the Acrobat JavaScript Reference early and often

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Adobe Community Professional ,
Apr 29, 2021 Apr 29, 2021

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There are a couple easy of things you can do that will allow the stamp, but prevent general editing.

1. Save the document with passord security that allows comments.

2. Save as certified with permissions to allow commenting. Requires commenters to have public key of digital certificate. Any changes outside the permissions will invalidate the certification. 

3. Save with "Extended Commenting Rights".  Can be broken by saving as a copy, but then you'll know. 

 

All of these techniques can be broken by some 3rd party PDF viewers and by malicious users who know a lot about what they are doing, but in general they are pretty reliable.

A more solid solution is to use a more sophisticated server based methodoloy, such as Adobe Sign, and/or a custom approval stamp. Or to be able to install software on the approvers system that would help in managing the process.  

Thom Parker - Software Developer at PDFScripting
Use the Acrobat JavaScript Reference early and often

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New Here ,
Apr 30, 2021 Apr 30, 2021

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Thanks!

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Adobe Community Professional ,
Apr 30, 2021 Apr 30, 2021

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Use a digital signature instead of a stamp.

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New Here ,
Apr 30, 2021 Apr 30, 2021

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Yeh, this seems to be the only way to be secure. 

Thanks!

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New Here ,
Apr 30, 2021 Apr 30, 2021

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I'm looking for a secure way I like to try that stamp

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