Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.ServiceModel/System/ServiceModel/Security/NonceToken.cs

@@ -0,0 +1,34 @@
+//------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//------------------------------------------------------------
+
+namespace System.ServiceModel.Security
+{
+    using System.Collections;
+    using System.ServiceModel;
+    using System.IO;
+    using System.IdentityModel.Claims;
+    using System.IdentityModel.Policy;
+    using System.Security.Cryptography;
+    using System.ServiceModel.Security.Tokens;
+    using System.Text;
+    using System.Xml;
+
+    sealed class NonceToken : BinarySecretSecurityToken
+    {
+        public NonceToken(byte[] key)
+            : this(SecurityUniqueId.Create().Value, key)
+        {
+        }
+
+        public NonceToken(string id, byte[] key)
+            : base(id, key, false)
+        {
+        }
+
+        public NonceToken(int keySizeInBits)
+            : base(SecurityUniqueId.Create().Value, keySizeInBits, false)
+        {
+        }
+    }
+}