AxpertSoft pdf security software is advanced pdf encryption tool used to lock pdf document with password security of document opening as well as restricting pdf file accessibility like editing, printing & content copying etc. Dual locking of pdf files using user password and owner password makes document much more secure. User can use 40 bit, 128 bit or 256 bit long encryption key to lock pdf files. Encrypt your acrobat pdf documents to lock pdf files accessing, make it accessible only for authorised users. Pdf password is prompted to input if someone try to open locked document. Pdf password security software makes you assure that your document is secure and only intended person can open and view document content. Pdf encryption is made compatible to work on Windows 8 operating systems, also support earlier versions of Windows including XP, Vista & 7. This powerful desktop utility uses few mouse clicks only to secure pdf files. Select the source pdf document, define target location of output and start encryption after setting user & owner password. Pdf restrictions for document editing, printing, commenting, signing, data extraction, copying, form filling & screen reading are optional. Free evaluation version creates watermarking over pdf document pages.