| Class Summary | 
| Aes128Security | AES 128 bit PDF security is compatible with PDF version 1.5 and higher and
 can be read with Adobe Acrobat Reader version 7 or higher. | 
| Aes256Security | AES 256 bit PDF security is compatible with PDF version 1.5 and higher and
 can be read with Adobe Acrobat Reader version 9 or higher. | 
| EncryptDocumentComponents | Specifies the document components to be encrypted. | 
| RC4128Security | RC4 128 bit PDF security, with UseCryptFilter property set to false is compatible with PDF version 1.4 or higher and can be read
 with Adobe Acrobat Reader version 5 or higher. | 
| RC440Security | RC4 40 bit PDF security is compatible with PDF version 1.1 and higher and can be read
 with Adobe Acrobat version 3 and higher. |