I'd like to set the following specific securities over my PDF document:
1. Password access
2. Editing (copy/paste) disabled.
I already know how to do these two in Acrobat.
3. Limit the number of computers which can open the document. (i.e. I want to prevent the document holder from sending their copy of the PDF to someone else via email, external hard drive, etc. Once he/she opens the PDF on their laptop, it can't be opened again on any other cpu)
4. Expiration (i.e. I want to set a 5/10/15/ or 30-day expiration on the document. Once it's been opened, it will become inaccessible in 5/10/15/ or 30 days' time.....whichever I would specifiy)
Can someone help me with the last two items? Your help is much appreciated.
You would need DRM. If your medium to large scale enterprise wants to set up DRM, and has the servers and expertise to do so, look into LiveCycle Rights Management http://www.adobe.com/uk/products/livecycle/modules.displayTab3.html#a
If (and this is a big IF) all recipients of your PDFs have digital IDs (PKI-based certificates), you can encrypt your PDFs with certificate encryption. In the encryption workflow you add recipients' certificates (with public key only) to the encrypted document. After that only holders of one of those certificates may be able to open your PDFs. This method does not restrict the documents from opening only on specific CPUs and does not prevent documents from being moved from one location to another but rather restricts the ability to open this document to a pre0defined group of people who are identified by their Digital IDs.
The caveat here is that all these people need to have Digital IDs and send you their public keys.