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5. Manipulating PDF Files > 66. Copy-Protect Your PDF

Copy-Protect Your PDF

Control how far your document can wander by making it difficult to copy.

A large document represents a great deal of work, and PDF is a good way to distribute large documents. Sometimes, it is too good. Perhaps your readers are paying customers, and you don’t want them to make copies for their friends. Perhaps you want people to read your work only from your web site, not from a downloaded copy. These kinds of controls go beyond standard PDF security [Hack #52] . This hack discusses some solutions.

Low Tech: Print Editions

Copying and sharing print editions of your document would be too much trouble for most readers. Your price for this security is the cost and trouble of production and shipping. However, readers might prefer a print edition, such as the one shown in Figure 5-15, in which case you are also adding value to your work. [Hack #29] discusses how to create print-on-demand (POD) books. Print editions are vulnerable to being converted to unsecured PDF by scanning and OCR.


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