Thank you for your quick responses they are definitely useful. 

I am in agreement with �Digitally signed PDF cannot be modified�. Looks like I am going to end up loading the PDF�s as is using generic indexer with an inbuilt program I have written to create generic indexer file from the .csv file (with index information related to PDF file). These volumes are less so I don�t mind now to do this way or probably I don�t have choice as we use HP Exstream to generate the PDF�s.

Regarding security we are going to come up with the server level security where we store these PDF�s instead of encryption at PDF level.

Thank you once again for those insightful.

I have a requirement coming up to archive e-signed PDF into CMOD. This is my first time working with e-signed PDF's. I want to know what is the best way to archive e-signed PDF's and any documentation will be helpful.

I have the following questions too.

1. Most of our documents archived today in cmod are AFP's. Is there a possibility that I can get e-signed AFP version to archive and transform the same to e-sign PDF while accessing it?
2. There are going to be bank account numbers on the PDF's, is there any way I can mask the bank account numbers on the PDF's while displaying the same? Can I display the bank account numbers based on the users accessing the PDF's?