diff --git a/Crypto/src/crypto/tls/TlsNullCipher.cs b/Crypto/src/crypto/tls/TlsNullCipher.cs
new file mode 100644
index 000000000..b76f76d9c
--- /dev/null
+++ b/Crypto/src/crypto/tls/TlsNullCipher.cs
@@ -0,0 +1,28 @@
+using System;
+
+namespace Org.BouncyCastle.Crypto.Tls
+{
+ /// <summary>
+ /// A NULL cipher suite, for use during handshake.
+ /// </summary>
+ public class TlsNullCipher
+ : TlsCipher
+ {
+ public virtual byte[] EncodePlaintext(ContentType type, byte[] plaintext, int offset, int len)
+ {
+ return CopyData(plaintext, offset, len);
+ }
+
+ public virtual byte[] DecodeCiphertext(ContentType type, byte[] ciphertext, int offset, int len)
+ {
+ return CopyData(ciphertext, offset, len);
+ }
+
+ protected virtual byte[] CopyData(byte[] text, int offset, int len)
+ {
+ byte[] result = new byte[len];
+ Array.Copy(text, offset, result, 0, len);
+ return result;
+ }
+ }
+}
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