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3 种不同的版本：

• 非商业:Encrypt PDF (GUI)

• 开发者授权：Encrypt PDF Command Line

• 服务器运营商：Encrypt PDF COM

操作系统

• Microsoft Windows 98／Me／NT／2000／XP／2003／视图／7／32 -位和2008 of both 64位。

Encrypt PDF (GUI)

操作简单

• 操作步骤简单。

• 支持拖放。

• 不需要Adobe Acrobat软件。

• 批量设置归档中所有PDF的权限。

加密PDF

• 设置开放或用户密码保护PDF未经授权的开放。

• 设置所有者密码以保护PDF免受未经授权的编辑、打印和应对。

• 支持40位或128位的PDF加密保护。

保护PDF不被授权使用

• 防止未经授权的用户打印PDF。

• 防止复制PDF的文本或图形。

• 防止更改或编辑PDF内容。

Encrypt PDF Command Line

Encrypt PDF Command Line提供常规控制台接口,除了Encrypt PDF (GUI)所有功能以外，还具备以下功能：

• 提供命令行应用程序。

• 支持通配符作为例子中的星号：* .pdf。

• 在CGI（服务器端）中简单易使用。

两种类型的PDF密码

• 所有者/主密码

• 用户/打开密码

注意：其源PDF必须是未加密的PDF。如果该PDF是加密的，则Acrobat Reader将在底部状态栏里显示一把钥匙。

可以使用所有者密码来保护PDF文件不被打印、编辑、更改和复制。使用所有者密码，用户可以获得对PDF文件的完全访问权。这意味着如果打印被禁用，则需要使用所有者密码来打印PDF文件。第二种类型是用户密码。如果你想读一个开放的受密码保护的PDF文件，就需要用户密码。

Note：The source PDF must be an unencrypted PDF. Acrobat Reader will show a key in the bottom status bar if the PDF is encrypted.

There two passwords you can apply to a PDF. The first is the owner password. Opening a PDF with this password will allow you full access to the PDF when a user password has been assigned as well. This means that even if printing was disabled you will still be able to print the PDF when using this password. No password will be prompted for when opening the PDF if you secure it with only an owner password. The second is the user password. Opening a PDF with this password will restrict you based on how the PDF was password protected (printing may be disabled, for instance).

Encrypt PDF (User interface) Features

Easy to use
Do NOT need Adobe Acrobat software
Support Windows 98, ME, NT, 2000, XP, 2003, Vista systems
It's simple to use it like a batch application to set permissions to every PDF in your archive
Password protect opening of the document
Prevent printing of the document
Prevent copying of text/graphics
Prevent changes to the document
Password protection for PDF files with 40 or 128 bit encryption
Support user password and owner password
Support add printing, copying and changing permissions to an encrypted PDF file
Set the document title, subject, author, keywords to a PDF file
Lock your PDF files instantly. Stop sharing, copying and piracy
Support drag and drop
Support Acrobat 9.0 PDF file (PDF 1.8 format)