Use pdf encryption & restrict pdf permission for editing, printing & copying. Adobe pdf lock program is very easy to use and wizard style interface tool which lets you to set pdf open & owner password, encrypt with RC4 & AES 128-bit encryption. Pdf encryption software is self explanatory application, designed to work with Windows operating system like XP, Vista & 7. Adobe pdf encrypt tool uses few simple steps in locking pdf files, select encrypt mode (single pdf or batch pdf), set both the passwords (user password & owner password), apply restrictions optionally like disable pdf printing, editing, allow pdf copying, form filling, signing & commenting etc. Encrypt pdf tool can easily be operated by novice user without requiring extra technical skills. Please note that if pdf file is already in protected mode, you can not re-encrypt document using our tool. You need to decrypt that specific pdf file using pdf security remover software before importing into pdf encryption program. Download free application and install on your PC to evaluate the working & performance. If you are in need to remove the program from your computer, installer contains un-install option too. Free version stamps watermark on the pages as a limitation and need to register to work limitation free.