About Arc4pdf

Arc4pdf is a utility to encrypt Ghostscript or LincPDF created PDF files. It uses the MD5 algorithm and the alternative RC4 algorithm, based on the specification defined in the PDF Reference Second Edition book.

INTERFACE

Usage: Arc4pdf in.pdf out.pdf [ UserPassword OwnerPassword AccessPrivileges R { R=2 40-bit encryption, R=3 128-bit encryption } ]

in.pdf is input PDF file, out.pdf is output encrypted PDF file. As options, UserPassword, OwnerPassword, AccessPrivileges and revision R can be applied (see the Reference for detail.) By default, the output PDF file will have no-printing access privilege, with no password for both user and owner.

LIMITATIONS

Arc4pdf is designed to encrypt Ghostscript or LincPDF created PDF files. Limitations applied to input include: