"gs-pdfencrypt"

Definition: gs-pdfencrypt: Provides support to view encrypted PDFs with GhostScript. This package provides the modifications necessary to view encrypted PDF files with the gs and gs-aladdin packages. When you give a PDF document an owner password, Adobe Acrobat encrypts it so that you can't just remove the password from the file. Unfortunately, because of stupid US regulations about exporting cryptographic software, the encryption cannot be added into programs like GhostScript which are distributed with source code from the US. You have to install this package to be able to view encrypted PDF files. From Debian 3.0r0 APT

* Linux/Unix/Computing Glossary