The content in the PDF may be private and you don't want other people to see it. The information contained in the PDF is valuable, it could be a training course, bid file, healthcare record, price list or a consulting report. Any way, you don't want to lose them. Then just try to use this PDF Encryption program to add a password to protect your own PDF files. Add User Password: You can set just a user password to control the opening permission of your PDF. Only those who know the user password can open your PDF. Apply Owner Password: You can control the access permissions like copying, modifying, and high quality printing, with an owner password. 3 Different Security Levels for Your Reference For different situations, you may have different encryption needs in the daily life and work. So Coolmuster PDF Encrypter provide users with 3 levels of encryption system: 40 bit RC4, 128 bit RC4 and 128 bit AES. 40 bit RC4: This is the lowest password protection which allows users to protect PDF document from printing, copying or editing individually. 128 bit RC4 is higher than 40 bit RC4. It offers more detailed options for use to apply restrictions for PDF document. 128 bit AES is undoubtedly become the highest password protection levels. It means Advanced Encryption Standard that gives stronger security measures to your file.
Limitations:
3-file processing trial
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