# EncryptionType Enum

> Enumeration EncryptionType.

- Product: Adobe PDF Library 21
- Language: .NET Framework
- Version: APDFL21.0.0PlusP1e
- HTML page: https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/EncryptionType
- Version index: https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/llms.txt

**Namespace:** `Datalogics::PDFL`

## Values

- `Standard = 0`: Reuse the document's current encryption settings, or use the standard 128-bit encryption.
- `AES256 = 1`: Encrypt the document using 256-bit AES encryption for Acrobat 9 or earlier.
- `AES256_AcroX = 2`: Encrypt the document using 256-bit AES encryption for Acrobat 10 or later.
- `RC4_40 = 3`: Encrypt the document using 40-bit RC4 encryption for Acrobat 5 or later.
- `RC4_128 = 4`: Encrypt the document using 128-bit RC4 encryption for Acrobat 5 or later.