diff --git a/DigitalData.Core.Abstractions/Security/ISecurityIdentifier.cs b/DigitalData.Core.Abstractions/Security/ISecurityIdentifier.cs
new file mode 100644
index 0000000..dd17ec9
--- /dev/null
+++ b/DigitalData.Core.Abstractions/Security/ISecurityIdentifier.cs
@@ -0,0 +1,9 @@
+namespace DigitalData.Core.Abstractions.Security
+{
+    public interface ISecurityIdentifier
+    {
+        public string Issuer { get; }
+
+        public string Audience { get; }
+    }
+}
\ No newline at end of file