Quartz 2D PDF Merge and encrypt

Hi,
I am absolutely new to this forum and we (my company) are doing some IPad and IPhone Development. I have a Java background and are doing currently some technology proof with X-Code and Objective-C. I want to drag two (or more) pdf-files on the Dock-Icon and merge them (including Tiger). Ideally I want to set some security options for the merged pdf. The drag and drop works fine, now I have to combine them. It proofed to work using the libraries ghostscript or podofo, but thats kind of a detour as all I learned from the quartz 2D docs that this is a core part of quartz. And using the libs there are unneccessary library dependencies and its a linux-way to solve it but not an Objective-C-way.
My understanding is now that I can create a PDF using 'CGPDFContextCreate' now I have to 'load' the existing PDF-Files and 'print' or 'draw' them to that context/object. I have not found the starting point from the docs to do that.
Can someone help me find the right track?
best,
Alex

Ok,
is that a way?
Create a context by 'CGPDFContextCreate'
then grab each page of the existing document and draw it using
CGContextDrawPDFPage. Feels circumstantially!?
right way?

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Quartz 2D PDF Merge and encrypt

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