Is PDF real Secure?

ElcomSoft said,

Here is what I was able to easily achieve, in mere seconds, on a regular PC.

1. Remove the Master Password and all the restrictions** it controls.
2. Remove the User Password*** (File Open), 40 and 128-bit RC4 encryption.
3. Remove DRM security from a PDF eBook that was locked**** to my system, and revert this PDF eBook to a regular PDF file that can be viewed and edited in Acrobat.

PDFCrack—RubyPDF supplies free software to get the PDF User Password, support 40 and 128-bit RC4 encryption, and 128 AES encryption, it is open source, and supports multiply plantform, the windows version is compiled and suppiled by RubyPDF.

PdfCrypt—RubyPDF also supplies free software to remove the PDF Master Password with need it, and the PDF User Password with the PDFCrack helps.

If you lost orgianl uncrypted PDF,  but want to remove Certificate Encrypt PDF, you can also ask RubyPDF for help.