Locklizard

To access a protected document, users must login with a username and password. This defeats sharing of documents since login credentials can be given to others. Safeguard is a PDF security solution independent of Acrobat which locks documents to specific computers and/or USB devices.

http://www.locklizard.com/adobe-livecycle-rights-management-vs-safeguard.htm

Adobe LiveCycle Rights Management ES2 competitors | Enterprise PDF DRM Compared to Adobe LiveCycle Rights Management ES2, Safeguard PDF Security provides enterprise PDF DRM with greater security at a fraction of the cost.

PDF copy protection is one of the aspects of PDF security and PDF digital rights management. A PDF lock is an effective access control method used for limiting access to pdf documents. There are many ways that one can use to implement this access control.
http://www.locklizard.com/pdf-copy-protection.htm

PDF Copy Protection: How to copy protect PDFs with DRM - LockLizard PDF copy protection guide that shows you how to secure and copy protect PDF content using LockLizard DRM software.