Adobe PDF documents password security is essential if document contains private or confidential data. To prevent document access from unauthorised access, try AdroitPDF Locker, a strong AES 256 bit with extension level 8 security provider tool. Program lets users to batch encrypt pdf document with different password for each document. AdroitPDF Locker is Windows utility, easy to install & run on Windows XP, Vista, 7 and 8 operating systems. Apart from top level security of 256 bit, it also provides option to encrypt pdf with RC4 method of 40 ? bit and 128 ? bit long encryption key. Pdf security software locks pdf file with two levels of password authentication one is user password and another one is owner password. User password is the one which is used to open locked pdf file for viewing however owner password, the master password stands for restricting document accessibility like file content editing, printing, signing, copying content on clipboard, form filling, commenting, data extraction and document conversion. Pdf encrypt tool is easy to access and user friendly tool. It is completely independent and standalone GUI based desktop version. It has inbuilt user help manual on how to use the product. Program is completely self descriptive and non destructive solution for securing bulk pdf documents. User need to register the program as the trial version has few limitation of watermarking over pages.