AxpertSoft PDF Encryption program is award winning desktop utility, lets users to password secure and encrypt document content to provide top notch security of 256 bit AES. Tool helps in locking pdf with user password and restrictions to prevent edit, print & copy. This is awesome utility, quickly locks thousands of pdf files as it support bulk file handling. Its ability to encrypt pdf with 40, 128 and 256 bit encryption makes it a perfect tool.