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注意：PDF Password Remover对于拥有用户密码的文档不能工作（防止该文件被打开），如果用户和所有者密码都不知道，则PDF Password Remover也会失败。

PDF Password Remover特点

易于使用；
支持拖放PDF文件；
不需要Adobe Acrobat软件；
支持Windows 98/ME/NT/2000/XP/2003/Vista/7系统；
支持32位和64位系统；
能够迅速地从您加密的PDF文件中移除响应的安全设置；
支持命令行操作（用于手动使用或包含在脚本中使用）；
支持PDF1.8格式（以前仅由Acrobat 9.0应用程序支持）；
支持PDF1.8（Acrobat 9.x）文件，包含40位的RC4解密、128位RC4解密、AES解密、压缩的文件以及未加密的元数据；
从命令行中批处理多个文件；
支持Adobe标准的40位加密，Adobe改进的128位加密和AES加密；
界面受保护的Adobe Acrobat PDF文件，移除在打印、编辑、复制操作上的限制。

Note：PDF Password Remover doesn't work with documents which have 'user' password (preventing the files from being opened), if both user and owner passwords are unknown the PDF Password Remover will fail.

PDF Password Remover features

Easy to use;
Support drag and drop PDF files;
Do NOT need Adobe Acrobat software;
Support Windows 98/ME/NT/2000/XP/2003/Vista/7 systems;
Support both 32bit and 64bit systems;
Remove the security settings from your encrypted PDF file is instant;
Support command line operation (for manual use or inclusion in scripts);
Support PDF1.8 format (formerly only supported by Acrobat 9.0 application);
Support PDF1.8 (Acrobat 9.x) files, including 40-bit RC4 decryption, 128-bit RC4 decryption, AES decryption, compressed files and unencrypted metadata;
Batch operation on many files from command line;
Support Adobe Standard 40-bit Encryption, Adobe Advanced 128-bit Encryption and AES Encryption;
Decrypt protected Adobe Acrobat PDF files, removing restrictions on printing, editing, copying;