When you encrypt a PDF, you also encrypt its attachments. The permissions you apply can affect whether users can unpack these attachments.
Once the PDF is open in Acrobat/Reader (which might require a password), any files attached to PDF pages can be unpacked, regardless of the PDF's permissions. This enables you to disable copy/paste features, yet still make select data available to your readers.
Document attachments are more restricted than page attachments. You must grant the ModifyAnnotations permission if you want your readers to be able to unpack and view document attachments.
Once the PDF is open in Acrobat/Reader (which might require a password), any files attached to PDF pages can be unpacked, regardless of the PDF's permissions. This enables you to disable copy/paste features, yet still make select data available to your readers.
Document attachments are more restricted than page attachments. You must grant the ModifyAnnotations permission if you want your readers to be able to unpack and view document attachments.
1 comments:
I wasn't aware of these facts about attachments and encryption. With the help of the information provided above I got to know about how permissions are set for the page attachments and document attachments.
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