DigitByte Software for Windows, Mac, iPhone, iPad, iPod – free download
PDF Encrypt allows you to encrypt existing PDFs. PDF Encrypt allows you to encrypt (using standard 40-bit or 128-bit or AES encryption ) existing PDFs, set permissions, add user and owner password.
Read More »Guaranteed PDF Decrypter (GuaPDF) – Free download
An utility to remove PDF passwords and restrictions.
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