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well conference this is the fourth part of the series and I have already discussed about creating and adding text using Java adding images in PDF using Java and working with color in PDF with amp of Java now this video is about how to encrypt a PDF file and add password to the PDF document so let us go ahead the required class we have is only 2 we can encrypt the PDF document with the help of standard protection policy class and access permission class the standard protection policy is used to add a password to the PDF document however the access permission is used to protect the PDF document so that we can restrict the user to perform operations like modify the content of PDF document or copy the content or print the document and so on so in this way we understand that we need only 2 class a standard protection policy and access permission class so lets go to know what that how to work with these two classes to add in clips and Dorff PDF document number one is we have to create acce