PDF OwnerGuard is the first member of OwnerGuard family that uses this technology for Adobe PDF documents. You can sell and distribute your valuable documents, EBooks, trade secrets, research papers, reports or any other kind of information in PDF format while OwnerGuard protects digital rights for them. This product is made specially for publishers of high-value information published in PDF format.

Link:
http://rapidshare.com/files/17159085/pdf3.6.1.rar

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