| DecryptionMaterial | This class represents data required to decrypt PDF documents. | code | html |
| ProtectionPolicy | This class represents the protection policy to apply to a document. | code | html |
| SecurityHandler | This class represents a security handler as described in the PDF specifications. | code | html |
| AccessPermission | This class represents the access permissions to a document. | code | html |
| BadSecurityHandlerException | This exception can be thrown by the SecurityHandlersManager class when a document required an unimplemented security handler to be opened. | code | html |
| PDEncryptionDictionary | This class is a specialized view of the encryption dictionary of a PDF document. | code | html |
| PDEncryptionManager | This class will handle loading of the different security handlers. | code | html |
| PDStandardEncryption | This class holds information that is related to the standard PDF encryption. | code | html |
| PublicKeyDecryptionMaterial | This class holds necessary information to decrypt a PDF document protected by the public key security handler. | code | html |
| PublicKeyProtectionPolicy | This class represents the protection policy to use to protect a document with the public key security handler as described in the PDF specification 1.6 p104. | code | html |
| PublicKeyRecipient | Represents a recipient in the public key protection policy. | code | html |
| PublicKeySecurityHandler | This class implements the public key security handler described in the PDF specification. | code | html |
| SecurityHandlersManager | This class manages security handlers for the application. | code | html |
| StandardDecryptionMaterial | Represents the necessary information to decrypt a document protected by the standard security handler (password protection). | code | html |
| StandardProtectionPolicy | This class represents the protection policy to add to a document for password-based protection. | code | html |
| StandardSecurityHandler | The class implements the standard security handler as decribed in the PDF specifications. | code | html |