Encrypting your PDF files with a strong password is a great way to prevent your files from opening or editing without your permission. Coolmuster PDF Locker is the simplest application for this; this PDF encryption software supports three different encryption systems, including 40-bit RC4, 128-bit RC4, and 128-bit AES
Features
Add a user password to protect your own PDF files.
Apply the owner’s password to control the access permission of PDF files, such as copying, modifying, and quality printing.
3 encryption security levels for your reference.
Various options for PDF security, such as resolution settings, document printing, and copying.
Support drag and drop operation.
Download:
Features
Add a user password to protect your own PDF files.
Apply the owner’s password to control the access permission of PDF files, such as copying, modifying, and quality printing.
3 encryption security levels for your reference.
Various options for PDF security, such as resolution settings, document printing, and copying.
Support drag and drop operation.
Download:
