Confused about digital signatures

Please refer to this archived thread:
http://www.adobeforums.com/webx?128@@.59b4d8d6
I'm researching digital signatures because we have a request form that was created in Acrobat 7.1, and that a user signed by creating his own signature in Reader 8.x. In Acrobat 7.1, I see a message when the file is opened that it has been digitally signed, and it verifies the signature. I'm trying to figure out whether that signature process would satisfy an auditor as to its authenticity.
But according to the above thread, I'd need at least Acrobat 8.0 to "enable" a PDF to be signed. What does that mean? The form I received, by all appearances, *was* signed. It didn't need a special signature field... the signature was added over a standard text field and it was recognized and authenticated, and appeared in the signature pane in both Acrobat 7.1 and Reader 8+.
Also, what does the 500 signature limit mean? By what process is it determined how many times a form has been used and signed? There is no tie, as far as I can see, from one copy of the form to another. The user simply saves a copy, fills it out, and sends it in. Many different people use that form (it's a work request form for IS services). Does the 500 limit apply in this scenario?
If anyone could please advise and point me toward documentation that would help me understand how all this should work, I'd be deeply grateful.

>But according to the above thread, I'd need at least Acrobat 8.0 to "enable" a PDF to be signed. What does that mean?
It means that you need to use Acrobat 8.0 Professional or above to
prepare a PDF in a special way.
If this is not done, Reader cannot sign it.
> The form I received, by all appearances, *was* signed.
One possibility is that the person who signed it was not clear about
what software they actually have.
>
>Also, what does the 500 signature limit mean?
The EULA gives the legal details that lawyers would apply. It has
seemed that each copy used counts towards the 500. If there is ANY
POSSIBILITY of this limit being reached it is prudent to use Adobe's
server enabling software instead.
Aandi Inston

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Question from worse than Newbie about digital signatures and Adobe Reader.

1st, thanks for taking the time to even look. 2nd, We are trying to use digital signature pads with PDF documents created by Documaker 11.4. In Adobe Pro there is a setting "Extend features in Adobe Reader" that will allow users with Adobe Reader to sign the PDF documents, however our "guy" creating the forms cannot find anything like this in Documaker. I've never used Documaker before and dont have a copy to even play with, but I was hoping there was a simple "go here, click this" answer.
Any and all help is greatly appreciated.
Thanks for you time,
Jeff Holt

I'm not expert on Documaker, but I'm close to them and will try to find an answer if I can be sure of the question.
Documaker is capable of creating PDF signature markers in the output PDF. Those markers are compatible with tools like Acrobat which can sign the documents. Is your question about how to create the markers or are you doing that and finding that Acrobat Reader will not allow you to sign them?
I'd have to research Adobe's licensing for Acrobat and Reader to see if that was the issue. I know certain features in Acrobat Reader are locked down by Adobe so you have to have another product license from them to enable the feature. If that is the problem, then I'm pretty sure that Documaker has no mechanism to provide a license token to specifically enable the Acrobat Reader product.
If you can provide more specifics, I'll try to follow up. You may also contact Customer Support, if you haven't already and open a case there requesting a specific question be answered.
Best Regards.

How to go about Digital Signature/Encryption for Purchase Orders

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We would like to send the Purchase Orders through E-Mail to suppliers in SAP. As per our legal department recommendations, we must implement the digital signature/Encryption mechanism in SAP prior to send the PO's through email.
I have no knowledge about available features, configuration requirements in SAP and required decryption machanism from Supplier side.
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Guess these documents will be very helpfull..
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/55ba9790-0201-0010-aa98-ce8f51ea93cd
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/7f52fd28-0b01-0010-afb0-cc70884fa369
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/a09f3d8e-d478-2910-9eb8-caa6516dd7d9
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/1c51c590-0201-0010-ffbc-b2bef1c57385
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/1c51c590-0201-0010-ffbc-b2bef1c57385
Reward points if found helpfull.........

A problem about digital signature authentication

Hi all:
I just want to know how to implement the digital signature in the adobe form as well as its theroy, processing and the server condition. Please inform me any document available for reference.
Thanks.

The Digital Signature User Guide and Acrobat Security Administration Guide are of particular interest at the location Simon pointed to.

Basic problem about Digital signature

hi
i am new to digital signature .
I am Developing onlinepurchasing demo.when customer order for quotation he recieves a quotaion pdf which is singed by delaler .now my quostion is how customer can validate that signature .do i need to send certificates to customer along with pdf . please help
can anyone suggest me good link to learn digital signature.
Thanks
Niraj

Niraj
The best solution for your scenario would be to "Certify" the PDF that you send to your customer. A certifying signature is a digital signature applied to a PDF (typically by the author of the document). Adobe partners with various Certificate Authorities that provide "Certified Document Service" credentials. If a PDF is certified by one of these credentials, the validation on the client side occurs seamlessly with no configuration required on the client as Acrobat and Reader ship with the Adobe Root Certificate installed.
For more information on the this, check out: http://www.adobe.com/security/partners_cds.html
also, http://blogs.adobe.com/security/2008/01/demo_certified_documents_in_ad.html
and, http://blogs.adobe.com/security/2008/11/livecycle_digital_signatures_t_1.html
Technically, you could certify a PDF with any credential, but you would need to distribute the certificate (public key) with instructions on how to install it and configure the trust settings in Acrobat or Reader.
Regards
Steve

Question about digital signature

How I can create digital signature for document by some OAS tool in Java servlet? If yes, then how?
Thanks
Excuse me my English.
Maxim

you add a signature field to your form --> then watch the properties
you can define collections of fields to tell the document which fields should be regarded/disabled by signing the document
ads can check signatures (digital signatures) serverside (methods for the pdf object)
with signature pads its special, you need hardware (pads) and software (plugins for the reader) and so on...
for signatures in general:
http://help.sap.com/saphelp_nw2004s/helpdata/en/18/ecb69017ad4765855425b97f666470/frameset.htm

Created a user account for my daughter but itunes will not open, just says something about digital signature policy

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Could anyone help.
Cheers

am not prepared to enter my credit card also on her account application.
You can enter it on the registration page then delete it immediately after you complete the registration.
If I purchase a iTunes card with some credit, can I open the account for her just with the code?
If you wish. Instead of going to Create new accout, go to Redeem on the main iTunes store screen, enter the code, then select *Create new account*.
What will happen if the credit on the card gets to zero?
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Questions about digital signatures

We have about 100 people in our organization all using Acrobat X Pro. We currently sign PDFs (only used internally--we don't sign things to be sent out to customers, vendors, etc.) using the self-signed, self-generated PKS#12 option. This has worked well for us in the past, but we find ourselves having to backup each user's signature in case it gets lost, deleted, hard drive crashes, etc. Is there a more central way to sign documents so our users don't generate their own signatures, email them to other users, etc.? We'd like to use something that can incorporate the users' domain credentials so they don't have to remember a separate password. We're on a 2008 R2 domain. Thanks!

Eline,
Yes, you can connect the wireless headphone to the player. Infact you can connect it to any stereo devices with the audio transmitter as long it's using a 3.5mm minijack. It shouldn't be a problem for the audio even if the player is inside the bag. It works about the same way as a mobilephone to a Bluetooth headset. Unfortunately, the Zen Xtra player does not support remote control feature.
Jason

Confusion about digital audio handling in Apple eco-sphere

Confusion among Apple users. We need some answers about bit rate and word lengths in the Apple eco-sphere. This is the source material we have today:
CD 16/44.1 -> iTunes rip at 16/44.1
CD 16/44.1 -> iTunes rip at 16/48
HD audio 24/96 -> iTunes 24/96 downloads (maybe in FLAC or WAV converted to AIFF or ALAC?)
On the Mac lots of things happen with audio:
1 Conversion programs are available for CD ripping and file format changes. I have a small contribution to this part of the confusion, I purchase FLAC files and convert to AIFF using the program XLD, which seems to me to be ideal. Others may have different solution. iTunes also has a good reputation for direct CD ripping.
2 The setting of AudioMIDI (number of bits and rate) can be changed for the output up to 24/96, what effect does this have? I know for certain you have to restart iTunes if you change the settings as it reads them only once at startup.
3 Playing a file with a different bits/rate may or may not up-/down-sample. For example with AudioMIDI set to 24/96, what comes out when you play a 16/44.1 file? And vice versa, play a 24/96 with AudioMIDI set to 16/44.1, what comes out? Is it the setting of AudioMIDI that defines the output itself or the setting iTunes reads from AudioMIDI when it starts up?
For example if I start iTunes with AudioMIDI set at 16/44.1, then change it to 24/96, does iTunes continue to output 16/44.1 or does the system up-sample to 24/96? And vice versa.
4 Now the confusion gets worse if you stream the files to an Airport Express or New Apple TV. What conversions does iTunes make, does AudioMIDI have any effect, what is the bits/rate spec for the stream,is this different for Ethernet wired or WiFi connections, what conversion do the AE or ATV do, if any, and what does it output for each of the stored file types.
We need a complete and clear description of all of these issues so we can resolve the many, many discussions that are on the forum.
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I have had no issues with the D3 and Apple TV working after sleep. Indeed, there is no data connection between the two except that the Apple TV sends a laser based digitial audio signal to the D3 for DA conversion. The D3 does not communicate with the Apple TV and the Apple TV does not signal to the D3 that it is asleep or awake. The D3 just sits there and waits for the light to come in for conversion to analog.
I suspect your problem is in the Apple TV. Perhaps you have a bad unit and need to get a replacement under warranty (ASAP if still under the 90 day but hopefully you bought the Apple care 1-3 year warranty with it?) Regardless, even out of warranty, if you make an appointment with an Apple store via the web, show up, very nicely tell the Genius Bar person that the toslink feature seems to never have been working (does not matter that it goes to a D3 or a $6000 DAC so don't mention it!), they will check your warranty, see that it is bad, and 9 times out of ten, hand you a brand new Apple TV unit! They take the old one back, refurb it, and resell it. No one looses. Be nice the whole time! Even if they say you are out of luck, just be nice. Nice really works at the Apple store!
The other issue that might cause this is syncing. If the D3 or Apple TV are hooked up to a power strip that shuts off to save power (or that you shut off manually), this might unsync the two. So leave both on power lines that always remain on. That's how I have mine set up.

Digital Signatures Help Requested

I looked through the forums and there was one thread not too long ago that talked about digital signatures but didn't seem to focus on this particular problem, so I figured I'd start a new one hoping someone would have some advice.
We receive a document that is digitally signed by our client. We view the PDF in the full version of Acrobat and have added these users as Trusted Users (in managed trusted identities).
We Verify the Signatures that were added to the document and see the digital signatures at the bottom of the document but there's one thing that's not showing up and that's the actual "signature" or "signed signature" of the person. We only see a typed out version of their name.
We've spoken to our client and they maintain that we should be viewing the "signed signature" and we need to figure it out.
When I check the Signature Properties, it tells me that their signatures were created using "Entrust.PPKEF". Could this be the problem?
As much as I'm reading up on Digital Signatures, it's my belief that we don't need to purchase any other software in order to view these properly. Am I mistaken.
Any help would sure be appreciated.
Paul

Hi Paul,
Are you expecting a "wet ink" type of signature? That is, an image in the signature field that is a copy of a signature someone created with pen and paper? If that's what you really need then maybe a digital signature workflow is not what you should require from your client. However, in many respects a digital signature (at least in the electronic world) is a much more powerful tool then a wet ink facsimile.
In this day and age, anyone could grab an image of a wet ink signature, crop it and use it apply it to a document as if they were the original signer. In others words, in the electronic world a wet ink signature is not very secure. However, a digital signature cryptographically binds the signer to the document. As long as the digital ID used to create the digital signature comes from a trusted third party (i.e. a certificate authority that vettes the identity of the individual before they issue the digital ID) then you are get two things from the digital signature. One is document integrity (you will know if the document has been altered post signing), and the other is non-repudiation (the signer cannot deny that they were the person that applied the digital signature). If you are accepting digital IDs (it's the "manage trusted identities" thing you mentioned) issued by a certificate authority that does not vette the identity of the signer then you have to be a bit more leery of trusting the signer.
I don't know if the Entrust signature method has the ability to add a custome appearance that includes the wet ink facsimile, but if it does, your client could create a digital signature whose appearance looks like a wet ink signature. However, the bottom line is the lack of a wet ink facsimile is not a cause of concern when it comes to digital signatures in PDF files.
Steve

Digital signatures and wet ink signatures

HI all,
I am in the process of converting our paper checklists into fillable pdf forms. Everything is working well, but Im trying to get my head around digital signatures.
Ideally I just want to click the signature part, choose a user from a list, enter the password and the 'wet ink' signature that is scanned in gets added to the form.
So on my laptop I setup a new appearance for my signature, scanned my signature and added it to my digital signature. Perfect.
Problem is, I want to be able to use this on other computers. I copied the digital signature .pfx file and imported it on that new computer, which worked, but it drops the 'wet ink' signature and appearance.
It also appears that anyone can create a digital ID on my laptop and choose my wet ink signature appearance, and sign the document which makes it appear as if I have signed it. I was hoping the wet ink signature was locked with the digital signature but it appears this isnt the case.
Im trying to find the best way to store our signatures (we are all on a network), so that any user can use any computer and ideally lock the wet ink signature to the digital signature.
Many thanks
Chris

It doesn't work for everyone, but if you are considering moving to the world of digital signatures, it's best to forget the signature appearance ("wet"). This is just a distraction to the actual signature, and it encourages a deeply flawed workflow: one where people look at the picture on the page rather than learning about digital signatures and how to verify them. Since digital signatures are (if done properly) unfakeable and (in some places) legally recognised, it is best to completely change workflow, rather than trying to give the illusion it is just an electronic version of a paper workflow.

Digital Signature Not Showing Up in Saved PDF

I am frequently sent pdf contracts that need to be filled out, signed and returned. I turn the pdf into a form and then add a signature field, click "certify with visible signature," sign it and save it as a pdf. But then when I email the signed pdf it has all the form content but doesn't show the signature. Same for when I open the file in Preview. The signature only shows up in Acrobat. Can anyone help explain what I am doing wrong?
Thanks in advance.

Hi,
It was dsaks who originally asking about creating a digital signature and that's what the core of this thread is about. When Mobius Strip asked about flattening the signature into a bitmap image that I suggested using a custom signature appearance, because the progenitor of the thread was asking about digital signatures. If they can get by with using a custom stamp then that's fine by me, but that wasn't the thread topic.
On to your questions:
mrtoner wrote:
I understand why Adobe won't (if that's the case) license the digital signatures ability so that Preview and other applications can use it. However, it should be trivial to allow that wet ink signature appear in other apps and I don't see a compelling reason to prevent it -- afer all, it's not a digital signature.
There is no licensing involved here. The PDF specification is public and the Acrobat SDK even has an example of how to create your own signature plug-in. When it comes to the actual cryptographic operations we license the software from RSA. As far as how the signature is created, and how it should be processed, that's all covered by public facing documentation. In fact, Apple is more than capable of processing signatures using their Keychain utility, it's just that they have elected not to include that functionality into Preview.
If your job is to monitor this forum and assist users, why couldn't you manage to suggest that the other users use the stamps feature, since it was clear that what they were wanting was only the signature image? These folks are spending hundreds and thousands of dollars on your products and they deserve better than this.
It's not my job to monitor the forum. I chime in on digital signature issues because it's a complex subject and there are so few people who understand the minutia of how they work. If dsaks hadn't added "certify with visible signature," to the original post I would have skip this completely, but he/she did so I tried to answer their question.
Finally, it's a bit disingenuous when you stated "The image does not display at all, except in Acrobat/Acrobat Reader". It just doesn't display in the free Mac Preview app. There are other third party signature handlers that will process and display a digital signature in a PDF file, but there are not a lot of them in free PDF viewers. As I said above, if dsaks can get by with a custom stamp then great, but if he/she needs a cryptographically sound digital signature then there is no reason why not to created it because everyone can get the free Reader for the Mac, Windows and Linux platforms.
Steve

Digital signature in SAP

I would like to know more about Digital signature in SAP. If it SAP support this, then how can we implement the same. Is it possible to send an SAP output (PDF format) with digitally signed?

WELCOME TO SDN.
plz SEARCH in SCN before posting.
[Digital signature in SAP|https://forums.sdn.sap.com/click.jspa?searchID=25740896&messageID=7355413]

Adobe Form Digital Signature using WDA

Hi,
I have implemented Interactive Adobe Form using WDA, with one Signature Field.
I need to set and verify the status of the Digital Signature.
1) Is it possible to sign the Adobe form without the user selecting the Digital Id, basically what is needed to implement automatic signatures (setting and verifying)?
2) Once the data is filled online, the form is to be distributed or downloaded. How to apply security parameters to Form in this case (like pass protected etc). From SAP documentation, I understand we need to use Adobe Policy Server. Can we install this server on the Java stack of SAP WAS. Are there any other alternatives to implement such features?
Thanks & Regards,
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I realize there is quite a bit of crossover between the two topics, but becuase you want to know about digital signature and specifically offline security; this question would probably be better asked in the Adobe Interactive Forms forum:
SAP Interactive Forms by Adobe
However I'm not going to lock the thread, as the WDA forum you will find many Forms experts as well and might find a solution. I just think you might have better luck in the other forum. This is perhas a rare case where double posting would be appropriate as long as you go back and update both threads with any solutions.
It sounds like you may have already found it, but about all I can offer on the subject is the link to the latest version of the online help on the subject:
http://help.sap.com/saphelp_nw70ehp1/helpdata/en/48/a0677efb696bb9e10000000a42189d/frameset.htm

Digital Signature | Exchange Server 2013

Dear Expert,
My boss need to use Digital Signature in mail. Now, I use Exchange 2007, I have a plan to upgrade to Exchange 2013. What's the digital signature concept in Exchange Server 2013? What's the basic requirement?
Thanks in advance.

Digital signature is actually concept of Outlook or Outlook Web Access. You can implement it even without having Exchange. Anyway, you need to issue a certificate for digital signature to your boss either from your local CA or from public CA. After you install
certificate on his machine, you have to configure it in Outlook to be used for digital signing, as well as in OWA.
You can read more about digital signatures on my blog here : http://dizdarevic.ba/ddamirblog/?p=121
Please mark as helpful if you find my contribution useful or as an answer if it does answer your question. That will encourage me - and others - to take time out to help you. Thank you! Damir

Confused about digital signatures

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