diff --git a/src/main/java/org/opencord/aaa/api/AaaAuthState.java b/src/main/java/org/opencord/aaa/api/AaaAuthState.java
new file mode 100644
index 0000000..ffb4efb
--- /dev/null
+++ b/src/main/java/org/opencord/aaa/api/AaaAuthState.java
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.opencord.aaa.api;
+
+/**
+ * Designates the different states an AAA authentication session may be in.
+ */
+public enum AaaAuthState {
+    IDLE,
+    STARTED,
+    PENDING,
+    AUTHORIZED,
+    UNAUTHORIZED
+}