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CipherAlgorithmType Enumeration

Defines the possible cipher algorithms for the SslStream class.

Namespace:  System.Security.Authentication
Assemblies:   System (in System.dll)
  System.Net.Primitives (in System.Net.Primitives.dll)

public enum CipherAlgorithmType

Member nameDescription
AesThe Advanced Encryption Standard (AES) algorithm.
Aes128The Advanced Encryption Standard (AES) algorithm with a 128 bit key.
Aes192The Advanced Encryption Standard (AES) algorithm with a 192 bit key.
Aes256The Advanced Encryption Standard (AES) algorithm with a 256 bit key.
DesThe Data Encryption Standard (DES) algorithm.
NoneNo encryption algorithm is used.
NullNo encryption is used with a Null cipher algorithm.
Rc2Rivest's Code 2 (RC2) algorithm.
Rc4Rivest's Code 4 (RC4) algorithm.
TripleDesThe Triple Data Encryption Standard (3DES) algorithm.

This enumeration specifies valid values for the SslStream.CipherAlgorithm property.

The following example displays the properties of an SslStream.

static void AuthenticateCallback(IAsyncResult ar)
    SslStream stream = (SslStream) ar.AsyncState;
        Console.WriteLine("Authentication succeeded.");
        Console.WriteLine("Cipher: {0} strength {1}", stream.CipherAlgorithm, 
        Console.WriteLine("Hash: {0} strength {1}", 
            stream.HashAlgorithm, stream.HashStrength);
        Console.WriteLine("Key exchange: {0} strength {1}", 
            stream.KeyExchangeAlgorithm, stream.KeyExchangeStrength);
        Console.WriteLine("Protocol: {0}", stream.SslProtocol);
        // Encode a test message into a byte array. 
        // Signal the end of the message using the "<EOF>".
        byte[] message = Encoding.UTF8.GetBytes("Hello from the client.<EOF>");
        // Asynchronously send a message to the server.
        stream.BeginWrite(message, 0, message.Length, 
            new AsyncCallback(WriteCallback),
    catch (Exception authenticationException)
        e = authenticationException;
        complete = true;

.NET Framework

Supported in: 4.6, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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