1. Decrypt PDF files.
For PDF files with only editing passwords, this program can directly decrypt them.
For PDF files with viewing password, if you know the password, you can directly decrypt it. If you dont know the password, you can decrypt it with a brute force attempt.
2. Encrypt PDF files
Support to add view password and edit password to PDF files, supported encryption levels are 256-bit AES, 128-bit AES, 128-bit RC4.
