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# Enum SecurityHandler.AlgorithmType

Algorithm types. New in PDFNet v3.1

###### Namespace: pdftron.SDF

###### Assembly: PDFTronDotNet.dll

##### Syntax

    public enum SecurityHandler.AlgorithmType

### Fields

Name | Description
--- | ---
e_AES | Use Crypt filters with 128-bit AES (Advanced Encryption Standard) algorithm.
e_AES_256 | Use Crypt filters with 256-bit AES (Advanced Encryption Standard) algorithm.
e_RC4_128 | 128-bit RC4 algorithm.
e_RC4_40 | 40-bit RC4 algorithm.