AWinware PDF Encryption software is fast and affordable solution for encrypting bulk pdf files with user defined owner password. Software permits to add pdf open password also known as user password. Tool can apply security with two level of encryption: 40 bit RC4 and 128 Bit RC4. User can also restrict pdf printing, copying, form filling, content copying for accessibility, signing and commenting. Thus tool can be also be used to set various security restrictions. Trial version adds watermark on output pdf documents which can be removed by registering the product. Batch pdf protection software applies both user as well as owner password in a single click. Download free pdf locker software to test and evaluate by locking pdf file. Features: # Software supports Windows XP, Vista and Windows 7 operating system including 32 bit and 64 bit. # Tool provides two level of encryption security including 40 bit and 128 bit RC4. # Software provides pdf right click context menu option as short cut. # Software is available with inbuilt help manual. # Software is based on graphical user interface