Lock digital signature to prevent scanning

Hi, is there a way to lock an electronic signature to prevent someone else from scanning or copying it as with signatures on checks or perscription papers?

If you use the digital ID signature, the image could be copied but not the digital certificate.
There are international, national and state laws governing the use of electronic signatures.

Similar Messages

Need Help Locking Digital Signature Field

I am working on a form with a number of sections to be completed by various departments. When a section is completed, I have a digital signature set to lock the fields related to that section. The form is sent to the next department and so on… Locking the form fields with the digital signature works just fine. The problem I have it that when viewing the form in Acrobat 8 Pro, the digital signature can be right-clicked on and cleared. This unlocks all the related fields and makes the form free for editing.
Is there a way to lock the digital signature to prevent using the “Clear Signature” function?
Thanks for any help,
Richard

George,
Thanks for the quick reply. Upgrading to Acrobat 9 may be an option. If not, is there a way to lock these fields with scripting? Or applying a password after signing?
Thanks again,
Richard

Lock digital signature after an Infopath form has been signed

I created a form with multiple sections and signatures. I selected the When signed, make controls read-only. However, when the form is opened after the submission the remove option is still available. I want to lock down signature after it is submitted.
If updates are made to the form then it opens a new version of the from if approval required.

Hi Christic3,
This is a bit geeky, but here goes. Think of the PDF file in two layers (there are really more, but we'll keep it at two for simplicity). The bottom layer is the PDF content such as fonts, structure tags, and pages. The top layer is form data and comments (aka annotations). When you sign the PDF you sign everything (both layers), but the only allowable changes to the file are additions to the top layer. You can add form data and comments, but you cannot modify anything in the bottom layer without breaking existing signatures. In fact, you can't change (by change I mean modify or delete) anything on the top layer either, but you can add new (unsigned) items.
Bookmarks are part of the underlying PDF structure. Because they are as integral to the underlying structure as anything else, the ability to modify the bookmarks is locked after signing, otherwise it would be too easy to break the signature.
Steve

How to add a digital signature to scanned document within oracle form (10g)

Hi all
I have a task to add an digital signature to our scanned document which will be saved at oracle database.
Could any one till me form where I can start and how we can add this signature if it will need pluggable java component or web service or what.
Thanks
Bassem

Thank you for an answer.
>Do you want to actually sign the PDF or just place a signature field?
I want to actually sign the PDF.
>Do you want to do this on a desktop or a server (you mentioned command line)?
I want to do this on a server(Windows server).

Validate the digital signature from scanned TIFF image

Hi,
How to verify and validate digital signature form the scanned TIFF image?
Thanks,
Susila S

Hi,
How to verify and validate digital signature form the scanned TIFF image?
Thanks,
Susila S

Get digital signature from TIFF image

Hi,
How can we get digital signature from the scanned TIFF image?
Thanks,
Susila S

Do you mean a X.509 certificate or a digitalized image?
If its the first one, i don't think you can do it with Livecycle Alone.
If its the second one, anything from Paint to Corel will do.

Multiple Digital Signatures in Adobe Acrobat XI - PDF locks after first signature is saved

I am working with a fillable pdf that was set up by an administrator to have multiple DIGITAL ID/SIGNATURES inputted, i.e. it does not allow images of signatures or text; when you click on the signature field, it ONLY prompts the insertion of a Digital ID. This form requires multiple signatures and editing/text from diverse people. I need to sign it and then circulate it to these other people. For some reason, when I insert the first digital ID and save it, the pdf becomes locked - it is no longer fillable, and no one else can edit or even insert their own signatures. What can I do to allow editing/additional signatures to be inputted after putting in my signature and saving the document? PLEASE HELP.

I don't know where I could post it...Could you please tell me how I might check if signature fields are set to "read only" or not? I have been looking through this pdf for so long and I don't even see the option to do that. When I click on the signature field, it just prompts me to insert the digital signature...there isn't much information displayed at all.

Digital Signatures - how to prevent anyone from using my name

I've created a bunch of forms that have digital signatures enabled. When I've created one either with the PKCS or the Windows Certificate, what's to prevent anyone else from just typing my name, email address and Company Name? Yes, I can create one and save it with a password, but anyone can do that. I'm confused how I can ask our users to use digital signatures on internal documents, then have them email to accounting or HR, yet there's nothing to prevent anyone from using anyone else's name (ie how can I prove that it wasn't me that signed it)?
Is there nothing that's tied to Windows ie I can't use my login ID on our domain unless I use my network password? That's really the ONLY way I can prove I'm me.

Self-signed digital signatures are precisely that - the person creating them is the only one attesting to the contents, so you can make a perfectly-valid self-signed ID for Canta Claus of you want to. The critical thing to remember is that a self-signed ID will only validate if the recipient has your keyfile to compare it to. On your own machine it will show as valid because the key is present, but if you send the PDF to anyone else it will show as invalid unless you have separately transferred them a copy of your keyfile. It's that second file which tells them the ID is really yours, as they can physically check where it came from (e.g. by phoning you up). The recipient would then have to manually add the keyfile to the trusted list in Acrobat or Adobe Reader, and finally your PDF signature will get the green tick.
Self-signed IDs are find for internal company workflows as everyone can share their keyfiles, and the IT department can manage what's going on. If you're using digital IDs in a public setting you should never use self-signed certificates, instead you should purchase an ID from a Certificate Authority - a company whose IDs are tied to the 'root certificates' embedded in Acrobat and Adobe Reader. The CA will require proof of identity before selling you the cert, and so anyone can verify it's genuine without needing to contact you. CAS-issued certs for signing PDF files are not cheap, there are several vendors out there and I won't comment on which may be better.

Annotation field locked and subsequent digital signatures

Hi all,
i'm testing my PAdES digital signature library in Obj-C and i encountered this kind of PDF file
http://dl.dropbox.com/u/3995257/PDF/Locked.pdf
Acrobat Reader tells that the document is locked by a signature (Signature2). As far as i know locked means that the file can't be modified but is is impossible to append a digital signature too?
I tried to sign the document with my lib and as expected the second signature invalidates the first.
http://dl.dropbox.com/u/3995257/PDF/Sign_Locked.pdf
But... i tried to sign for the third time the previous file. I would expect that the first (locked) signature would be invalid but the second and the third would be not.
http://dl.dropbox.com/u/3995257/PDF/Sign_Sign_Locked.pdf
Despite my expectations, only the last signature is avalid according to Acrobat Reader.
Does the first locked signatures invalidates the subsequents? Or more simply i can't sign a Document locked PDF?
Thanks

Yes, because the first is a lock – anything you do after the fact will invalidate.
From: Adobe Forums <[email protected]<mailto:[email protected]>>
Reply-To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>>
Date: Wed, 28 Sep 2011 02:11:54 -0700
To: Leonard Rosenthol <[email protected]<mailto:[email protected]>>
Subject: Annotation field locked and subsequent digital signatures
Annotation field locked and subsequent digital signatures
created by Luigi Cuomo<http://forums.adobe.com/people/Luigi+Cuomo> in PDF Language and Specifications - View the full discussion<http://forums.adobe.com/message/3942243#3942243

Digital Signatures on Scanned forms

Is it possible to apply Digital Signatures on Scanned form; i.e can we add a hidden signature field?
Thanks,
Nith

Answered my own question. These numbers represent the time zone of the area where the digital signature was created.

How do I prevent the use of a digital signature?

I realize this flies in the face of some core security issues built into PDFs, but here we go...
We have a customer for whom we are creating fillable PDF forms. Due to the nature of the documents, they require handwritten signatures on printed hard copy. Since the ability to digitally sign any PDF is enabled by default, and especially since Acrobat Reader X apparently prompts the user to use a digital signature, our customer is concerned that some end-users (most of whom will be non-tech-savvy) will be confused by the digital signature concept and would prefer to prevent the use of digital signatures at all. I have played with the security settings in Acrobat Pro, but they are not granular enough to allow filling in a form without also allowing a digital signature. Any way to prevent signing?
Thanks,
Mike

@George Johnson:
I tried to edit and save the form from within Acrobat Standard X, but it didn't seem to make any difference.
@brogers_1:
I am not familiar with EchoSign, but since the end-users are not part of my organization, nor my customer's, I won't have access to their registry settings.
I don't want DigSigs at all.
There is no signature field in the document--unless it is somehow hidden.
When a user either left- or right-clicks any form field (in Reader X at least), a window pops up titled "Form Can Be Filled and Signed Electronically" with a note to click "Sign" etc.:

Interactive Form - digital signature and fields locked

Hi everyone,
Lets say we have 2 input fields in the Interactive Form.
In addition, we have a digital signature field that locks.
How can I specify which fields I want to lock ?
Thanks
Regards.

Hi David,
Lets say you have a digital signature field. What you could do is on the click event of the Signature field, you could Lock the 2 input fields.
Say Text1 & Text2 (Names of the Inputfields respectively) by using the following Commands.
Text1.access = "readOnly";
Text2.access = "readOnly";
Note : Before adding the code set the Language to "Java Script".

Digital Signature prevents submit via email and print

A form works perfectly well until I insert a digital signature into a digital signature box. So if the digital signature box is empty the buttons still work but sign the wrecked thing and nothing works anymore. I have created new signatures but nothing seems to work. Can you shed any light on this?

The problem is that the "Lock Fields After Signing" property is enabled (see attached screen shot). Buttons are considered fields, therefore when the signature is applied, the buttons are locked and can no longer be clicked. To fix this you can disable the property, or better yet create a field collection and select the specific fields that you want to lock if a signature is applied.
Regards
Steve

Digital signature hard lock dongle is not working.

Hi,
I have a digital signature hard lock dongle.
Which is not detecting on windows 7 64bit professional. However it is working with another dongle like Data Card, Pen drive, etc.
I also checked with another system it is working fine with other laptops. And digital signature dongle is working fine with other system also. But particular one system it is not able to recognize the same.
Please suggest for the same.
Thanks,
Tapas

Hi ittapas,
I suggest you manually find the driver in the dongle manufacture website, download and install it in your system, as well as some needed applications, if issue persists, check if you have any previous restore point, return the PC to a previous restore point
at which the system was functioning fine, test the issue.
Regards
Yolanda Zhu
TechNet Community Support

Digital Signatures/Javascript After Signing?

Hello everyone,
I'm currently developing forms for my company, post processed through Adobe Acrobat 9 Standard, that require digital signatures. Working in the food industry requires compliance to specific FDA guidelines, specifically CFR 21 part 11. In order to meet the requirements I must develop an SOP (Standard Operating Procedure) that proves signatures are accurate and secure.
The process is tedious, and I have called a few meetings thus far to discuss some of the unforseen circumstances. During the discussion a question was brought up stating; What protects forms stored in the archives (3 years for compliance) from being corrupted by a disgruntled employee? Specifically, what stops an employee from clearing a digital signature? I realize we can set up file access rights to the forms to prevent such happenings, but majority of the forms are setup to hold 6 months to a year of info, thus wouldn't be archived until filled completely.
My question: Does anyone out there know of a javascript or trick to disable the "Clear Signature" function after signed? I've been searching and have turned up empty handed. Also, does anyone have any other javascripts that are used after digital signature occurs?
Thanks in advance for any help you can give me,

George,
Thanks for your response.
The issue is not if the file is deleted, the issue is if the files becomes "manipulated". I think "corrupted" was the wrong choice of words.
To explain: Any form that is completed has several digital signatures within the contents, depending on which QA Technicians complete the task (e.g. Calibrations, Metal Detector Settings, etc...). Forms are setup by days, weeks, or in some cases years, and have designated signature areas for the time period the test was conducted. So, after "John Smith" completes his portion of the form he is required to digital sign the document, after signing is complete all information is set to read only and cannot be altered unless the signature is deleted.
Digital signatures can be deleted in two ways:
1. The user who signed the document, based on active directory, has the ability to "clear signature". As and FYI: no other user is capable of deleting a signature signed by another employee. (does not apply to the form author)
2. The file creator can add a "Reset button" control, thus being able to delete any data specified.
So as I said I'm looking for a way to lock all signature functions, after sign is completed, even for the original signer. So if form "Calibration01" is currently being filled out and has signatures x,y,and z on it; I want to make sure if "x" is disgruntled they do not maliciously go and clear their signature. Also, I would like all fields associated with the signature to be locked without any way for the user to manipulate or revise data.
If anyone has any javascripts that run once signer digitally signs, it would be a great help,
Thanks,

Lock digital signature to prevent scanning

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