I asked about this some months ago but didn't get a reply. The latest source code includes the following:
TWPDFEncryption = set of
(wpEncryptFile, wpEnablePrinting, wpEnableChanging, wpEnableCopying, wpEnableForms ,wpLowQualityPrintOnly
{,wpEnableDocAssembly,wpEnableFormFieldFillIn,
wpEnableAccessibilityOp
- not possible in PDF security 1 and 2, 3 is unpublished } );
Can you unpick the last comment please. We use wPDF to great effect in our structural engineering apps and have no problems with them being able to use the PDF produced by us into a larger document (which AIUI is precisely what DocAssembly allows) but do not want users to be able to modify or copy the content. IOW our ideal permissions would be EnablePrinting and EnableDocAssembly only
Tony Bryer, Survey Design Associates Limited
'Software to build on' http://www.sda.co.uk