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PDF Protector是一款Mac上易用的快速為PDF加密和解密的工具，可以方便的加密PDF和解密PDF文件，支持128位加密，保護你的PDF文件，除了加密解密外，還支持防止打印文檔，防止複製和修改的文件，非常的實用！

Language: Multilingual | 
PDF Protector is an easy-to-use utility to encrypt or decrypt your PDF documents. Set a password and let PDF Protector encrypt your documents to hinder others from opening it. You can also set a separate password that has to be known by everyone who wants to copy or print content of your your document.

Of cause PDF Protector also lets you remove any of these security mechanisms, providing you know the password. Since PDF Protector uses standard PDF functions, it works perfectly with other PDF applications. If you have to to encrypt or decrypt a lot of documents with the same password, you can set a default password to be used by PDF Protector.
Features
• Supports Adobe standard 40-bit encryption and Adobe advanced 128-bit encryption
• Password protect opening of the document
• Unlock password-protected documents
• Prevent printing of the document
• Prevent copying and changes to the document
• Easy to use
• Compatible with all common PDF readers, such as Preview.app or Adobe Reader
• Does not need Adobe Acrobat software
Release Notes

The app is now ready for macOS 10.15 Catalina.
The license management has been improved.
The update mechanism has been improved.
Supported Operation Systems:
macOS 10.10 or later 64-bit

Homepage
https://witt-software.com