[PDF] security

[William Wardwell]

We are trying to prevent ads which our company produces from being used by competitors in their publications.  We are sending our customers electronic proofs in PDF form by email which we build for them, which they then send to our competitors.  I would like to find a way to either embed "PROOF" across the ad which cannot be removed, but all parts of the ad can be read, or make the ad un-printable.  Is there any way to accomplish the embedding when making the PDF, yet not effect the native file?  Ideally, we would like to apply some type of watermark for every ad sent as a proof.  Thanks in advance.