Protecting a signed document

Hi
I tried to both password protect and sign a PDF document, but find that doing either disables the option to do the other.
Am I missing something here? Is there a way to both password protect and digitally sign?

As long as you don't specify restrictions that would prevent the use of digital signatures, you can set password security for a document and later open and sign it.

Similar Messages

Password protecting digitally signed documents in Adobe Acrobat X Pro

I am looking for the combination of steps to get my digitally signed documents to be password protected for secure distribution. My documents contain new "user password" information and a number of "areas" which require digital signatures to be added.
Any input as to how one would construct a document with :
one to three --> digitally signed signatures fields in one document
Password "opening" protection for the document containing the fields; both signatures and sensitive data fields
suggestions on how to make the document open to accepting more signatures without it demanding the creation of a newly saved document after being digitally signed by one signature
I have worked at this a couple of different ways but am having problems finding the right combination/sequence of steps to make it all come together.
Please assist.....
Thanks....

......meaning.......
I can't do locking of the printing or editing of the sheet after i have encrypted and signed it. Trying to do so, wipes out out signatures. Yes, it is a great fullproof to have people be unable to change something someone has signed but if there is an ammendment, can't the creator reserve that right and in an automated sense notify the signers of the rights of the author ?
Maybe I am looking for too much but, it would be great to know if that is the reality of the whole event.
Thanks,
Robert

Why is the validity of my digitally signed document displayed as unknown?

Why is the validity of my digitally signed document displayed as unknown?
Adobe X version 10 1.4
What exactly do I have to do under Preferences-Windows Integration?

Hi amyemia,
The signer's identity is unknown because it has not been included in the list of trusted identities and none or its parent certificates are trusted identities" indicates your recipients needs to add something to their copy of Acrobat/Reader. What the recipient of the document is missing is a certificate and only you can provide him with a copy of the certificate you created to sign the PDF. After you send him or make available a copy of the certificate, then he will need to import that certificate into his copy of Acrobat
Please refer : http://helpx.adobe.com/acrobat/kb/validity-digital-signature-displayed-unknown.html
If you want your PDF signature to be valid on your / co-worker's computer, you need to supply them with your Public certificate. To do this you need to export it out as an .fdf file, if in Acrobat X, choose Edit – Protection – Security Settings, select your ID that you used to sign the PDF with and choose Export, you can then either save it to disk, or directly email your certificate, get your co-worker to double click it in Adobe Reader and follow the prompt, when you see Set Contact Trust, select it and check Use Certificate as Trusted Root. Then click OK. Now open the PDF and it should now be valid.

Open sign document" dialogue by script

I've created a trusted function and succeed using the following script to sign a signature field without user interruption.
The problem now is how to to open a "sign document" dialogue and to let a user to complete the signing by entering a password and clicking on a sign button and not to do it automatically?
f.signatureSign( myEngine,
     {      password: "password",             // provide password
            location: "San Jose, CA",       // ... see note below
            reason: "I am approving this document",
            contactInfo: "[email protected]"
Thanks in advance, Yan

I've succeed by setting the bUI parameter to true:
                   f2.signatureSign({
                         oSig: myEngine,
                         oInfo: s,
                         bUI: true,
Yan.

How can I sign documents digitally (using a certificate)

On the windows platform, there is a lot available to digitally sign documents (using password protected certificates that have the same value as a real signature).
What alternatives are there on the Mac platform to sign office documents, spreadsheets, pdf's etc...?
Don't tell me the preview annotate add signature feature ( = useless) ... that has nothing to do with a legal signature as the document can be modified without the signature becoming invalid.
MS office for Mac does not seem to support creating or testing the signatures created on windows.

pgoedtkindt wrote:
MS office for Mac does not seem to support creating or testing the signatures created on windows.
I wonder if you've tried the various possibilities of MS Office for Mac. I have no idea which, if any, of these might or might not support what you're trying to do.
MS Office for Mac 2011 (latest official version)
MS Office 365 (works on Mac or Windows)
MS Office for Mac 2016 (Beta version available now)

Sign documents without entering a signature password?

On the PC version of Acrobat you can sign documents very easily without entering in a password every time you want to sign a document. On the mac version it appears that you have to enter a pwd every single time you sign a document... this is very frustrating when signing 20-30 docs at a time. Is there a way to disable the pwd requirement in Acrobat X for Mac?

Hi sojourner166,
For the sake of discussion lets limit how a digital ID is access to either directly from a file or through the operating system (OS). Both the file & the OS methods allow the user to access the private key (that's the part that is password protected) without having to enter the password each time.
On Windows the OS loads the digital ID into the Windows Certificate Store an on the Mac OS it uses Keychain Access. On Windows when you import a digital ID, if you don't select High Assurance (which is off by default) the OS assumes that if you could log in using your password that's good enough and will allow access to the private key without prompting you for the password. On the Mac, Keychain Access has UI which lets you control whether you need to confirm the password or not.
When you are signing with a digital ID in either of the OS based systems Acrobat say to the OS "give me access to the private key so I can do a signature operation". The OS then checks the setting and either grants access without further ado, or, it says to Acrobat "before I'll give you access to the private key you've got to tell me the password". Acrobat in turn puts up a dialog asking the user for the password. You type it in, hit the Sign button and Acrobat says to the OS, "okay here you go, now can I get access to the private key so I can finish this signing operation?". The OS checks the password that Acrobat sent along and if it's correct grants access to the private key, and if it's not correct returns an error code, which causes the signing operation to abort.
If the digital ID is residing in a file then the OS sits on the sideline and Acrobat handles the password work itself. If you are using a digital ID that resides in a file you can set the password timeout option through the Acrobat UI. In the Security Setting dialog expand Digital IDs in the tree view and then select Digital ID Files. From there you can click on the Password Timeout button and adjust how often you want to be prompted for a password to access the private key.
Here's a picture of what you are looking for:
If you are using a digital ID listed under Keychain Digital IDs let me know and I'll work up those steps for you.
Hope this helps,
Steve

'error while signing document'

i got this error ('error while signing document') on my 1st attempt to use the service. simple 4 page PDF, no doc. security, same error both b4 & after i edited my user profile (i filled in the missing details & changed the default signature image).
cheers,

Hi,
I am also getting this error while attempting to sign a document. I have checked the first and name fields in my default signature profile for any non-English characters but I am still getting this error. I have also tested with a different signature profile with same results. Please advise if there are
other fields I need to check.
Thanks.

Links no longer work after signing document

Links no longer work after signing document - I have updated to latest version and run installation repair, is this a problem or is it supposed to do that?

Hi;
This question would be best asked in the Acrobat signatures Forums, it is related to using Adobe Acrobat/Reader and does not have anything to do with the online service, Adobe Fill & Sign. Someone should be able to answer your question here: https://forums.adobe.com/community/acrobat/security_%26_digital_signatures
Thanks,
Josh

How do I password-protect a PDF document that doesn't let me change the security settings?

I want to password-protect my PDF document (so when I email it, it can only be opened/read by intended recipients as it contains confidential/sensitive information) but when I go into document security, I'm unable to change the Security Method (which is currently set to 'No Security' - not by me). There's a 'show details' icon but it's grey so I can't click on it. What can I do to protect this document from being opened by non-intended recipients?

Ah, yes, I'm using Adobe Reader! That makes sense. Thanks so much for your reply. At the moment, I scan Word documents into my computer and they're automatically converted to PDFs. If I had Adobe Acrobat on my computer, and scanned in documents, would they open in Reader automatically or could I open them in Acrobat and therefore add password protection?

When saving a signed document can the -signed appellation be turned off?

When you go to save a document which you have digitally signed, the program automatically appends '-signed' to the end of the file name. This is not ideal for my purposes - is there any way to turn this function off? Also it it possible to turn off the prompt that asks me if I'd like to email the signed document? I've gone through every screen in preferences but I can't seem to find anything for this. I'm using Adobe Reader XI 11.0.5.
Thank in advance!

Not that I know of. Reader and Acrobat want you to have a new copy of the signed document and an original copy of the unsigned version, hence the behavior you do not want. You can always do a save change the name of the signed document to the original name if you desire.

Not able to attach final signed document in the contract document

Dear Experts,
The upload field for final signed document in the contract document is visible only for the latest/last contract document if there are more than one contract document exist in the Master Agreement.
For the previous contract documents, not able to attach final signed document (i.e) the upload field is invisible.This scenario is occuring only in few master agreements, mostly found in Legacy agreement types.But for newly created legacy agreements this scenario is not occuring.Please help me in finding out why the upload field is visible only for the last/latest and not for the previous ones.

Hi Dinesh,
Did you find a solution to this?
Regards,
NR

Error when trying to sign documents

I started getting the following message when trying to sign documents:The Windows Cryptographic Service Provider reported an error: Key not valid for use in specified state. Error Code 2148073403 . Any help would be appreciated Thank you

ahh, here is a problem. u made changes to the JDBC_SQL.java and packed the jar file. u have to sign the jar file again.
let me know if u need futher assistance

Update 9.1.2 breaks digital signing documents in Adobe 9 Pro on Windows XP

I am able to digitally sign documents using an Aladdin eToken Pro 64k with a fresh copy of Adobe 9 Pro for Windows. However when I update to version 9.1.2 digital signing fails with an "error encountered while BER decoding". Signing still works on Vista and Adobe 9.1.2 Pro. I've checked to make sure none of the settings relating to digital signing changed during the update and none have. Anyone have any ideas on how to correct the problem?

Hi Nick,
First up, there was a small error in my previous post. I said the version of Acrobat (and whenever I say Acrobat I really mean both Acrobat and Reader, but I'm too lazy to type both) that was modified to fix the bug in SHA-1 fallback was 9.1.3, but I really meant 9.3. Sorry about that.
I saw your post from yesterday (http://forums.adobe.com/thread/563601) where you broached the BER decoding error, but in the post above you said signature creation isn't failing any more, so hopefully some update has fixed the problem.
Here's a little bit about the BER Decoding error. During the signing process Acrobat writes the entire file to disk (which is why you always get the Save As dialog as part of the signing process) in the signed state with everything but the actual signature. However, it does leave a hole in the file where the BER encoded cryptographic data will reside once it's be computed and formatted. One thing that is created before the actual signature is the signature appearance. The signature appearance in the form field isn't really the signature proper, but just a graphic representation of the actual signature. The reason that the signature appearance is written to disk before the signature is created is because it too is part of the signed data and must exist before the actual signature is created.
In a perfect world, after the file is written to disk, the cryptographic signature is created and written into the hole in the PDF file, and the signing process completes without any problem. However, if we get to the point that the file has been written out, but during the actual signature creation the process fails, that hole I mentioned isn't filled in. It's not really a hole per se, but a block of zeros that act as a placeholder for the BER encoded data. Because there was some sort of failure and Acrobat didn't get the signed data back from the hardware device what you end up with is a PDF file with a signature appearance, but no real signature in the file. When you click on the signature field Acrobat tries to validate the actual signature, it finds the block of zeros where the signed data was supposed to be, it tries to decode the zeros and gets (as you might well imagine) nothing back and displays the BER Decoding error.
Let leaves us with why didn't Acrobat get the signed data back. When using hardware devices, such as tokens or smart cards, the actual cryptographic signing (the encryption of of the digest with the users private key) takes place on the device. Acrobat (nor any other application) doesn't have access to the private key, which is what makes hardware devices more secure. It's up to the device to sign the data and send it back. If there is any kind of breakdown in that communication channel (which I mentioned in my previous post) the signature creation doesn't reach fruition and you're left with an unsigned file that looks like it was signed because there is a signature appearance.
This is a case where we are providing technically correct, and utterly useless information. It's true that we can't decode a bunch of zeros, but what we should be telling the user is there is no signature (it's kind of like the Matrix where there is no spoon ).
I hope this helps explain what you're seeing. If the the signing process breaks down again please make sure you are using the latest version of Acrobat/Reader and the token software is up-to-date. If everything is current and the problem returns please let me know.
Steve

Acrobat X crashes every time when I open a signed document.

I'm running Acrobat 10.1.13.16.
Acrobat receives a Visual C++ run time error when opening signed documents. I can open standard PDF files without errors.
Microsoft Visual C++ Runtime Library
Runtime Error!
Program: C:\Program Files\Adobe\Acrobat 10.0\Acrobat\Acrobat.exe
This application has requested the Runtime to terminate it in an unusual way.
It's always on MVC90.DLL. I removed it from one installation and installed other Visual C++, but that didn't make any difference.
I've also tried re-installing Acrobat, Visual C++ 2008 Redistributable - x86 9.0.30729 and 9.0.30729.6161.
Here is a sysInfo collected from Acrobat.
Available Physical Memory: 1828380 KB
Available Virtual Memory: 1900892 KB
BIOS Version: DELL   - 1072009
Default Browser: C:\Program Files\Internet Explorer\iexplore.exe
    Version: 11.00.9600.16428 (winblue_gdr.131013-1700)
    Creation Date: 2014/11/12
    Creation Time: 8:12:26 AM
Default Mail: Microsoft Outlook
    mapi32.dll
    Version: 1.0.2536.0 (win7_rtm.090713-1255)
Graphics Card: Intel(R) HD Graphics 4000
    Version: 8.15.10.2639
    Check: Not Supported
Installed Acrobat: C:\Program Files\Adobe\Acrobat 10.0\Acrobat\Acrobat.exe
    Version: 10.1.13.16
    Creation Date: 2014/12/03
    Creation Time: 12:06:36 PM
Locale: English (United States)
Monitor:
    Name: Intel(R) HD Graphics 4000
    Resolution: 1366 x 768 x 60
    Bits per pixel: 32
OS Manufacturer: Microsoft Corporation
OS Name: Microsoft Windows Vista
OS Version: 6.1.7601 Service Pack 1
Page File Space: 4194303 KB
Processor: x86 Family 6 Model 58 Stepping 9 GenuineIntel ~2492 Mhz
System Name: LBE28
Temporary Directory: C:\Users\USERFOLDER\AppData\Local\Temp\
Time Zone: Central Standard Time
Total Physical Memory: 3576436 KB
Total Virtual Memory: 2097024 KB
User Name: USER
Windows Directory: C:\Windows
Installed plug-ins:
C:\Program Files\Adobe\Acrobat 10.0\Acrobat\plug_ins\Annots.api
    Version: 10.1.13.16
    Creation Date: 2014/12/03
    Creation Time: 12:07:12 PM
C:\Program Files\Adobe\Acrobat 10.0\Acrobat\plug_ins\CDSearch.api
    Version: 0, 1, 0, 9
    Creation Date: 2012/10/19
    Creation Time: 2:57:46 PM
C:\Program Files\Adobe\Acrobat 10.0\Acrobat\plug_ins\EScript.api
    Version: 10.1.13.16
    Creation Date: 2014/12/03
    Creation Time: 12:07:12 PM

Hi Luke,
You might want to check the steps mentioned in the KB: https://helpx.adobe.com/acrobat/kb/runtime-error-roaming-profile-workflows.html
Regards,
Rave

The "sign document" function is not working in Adobe Acrobat X 10.1.8?

I had an issue with Adobe Acrobat erroring with an error message relative to the Crypto file in Windows. I attempted to do the file folder renamaing to 'old', etc. to no avail. When I tried to restore everything to it's original state, the sign document window appears (see below), but when I click on the sign document buttone, nothing happens at all. I have tried this in multiple documents, through multiple siging routes, and all the same non-result. I have also reinstalled Acrobat to no avail; advice?

This is the Reader forum; the Acrobat one is here:
http://forums.adobe.com/community/acrobat

Protecting a signed document

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