Custom Security Encryption on Android and iOS

[James]

Q: Does it allow us to implement our own non-standard encryption layer(filter) to do decryption for reading PDFs and also encryption for writing changes like annotations or form fields?

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A:

Custom security handlers are supported, as are the setting or modifying of security permissions associated with a document. Please refer to these relevant forum posts:

https://groups.google.com/forum/#!searchin/pdfnet-sdk/custom$20encryption/pdfnet-sdk/dJpyhULyYUA/0ozIje6-m5kJ 

https://groups.google.com/forum/#!searchin/pdfnet-sdk/custom$20encryption/pdfnet-sdk/nJ6eZiDzUv0/mvzxA2TQIGAJ 

https://groups.google.com/forum/#!searchin/pdfnet-sdk/custom$20encryption/pdfnet-sdk/6-YtIpG7JLI/9sLmZo9DXt0J 

https://groups.google.com/forum/#!searchin/pdfnet-sdk/custom$20encryption/pdfnet-sdk/fsSRD9uNYeQ/Xa2lvrJq-m8J  

Additionally both Android and iOS SDK come with a sample custom filters.

For Android please see:
  \Samples\PDFViewCtrlDemo\src\com\pdftron\pdfnet\demo\pdfviewctrl\UserCustomFilter.java

For iOS please see:

  PDFNet_iOS/Samples/CustomFilter/