diff --git a/src/main/java/com/palnet/comn/collection/AuthCollection.java b/src/main/java/com/palnet/comn/collection/AuthCollection.java
index 492719d..83864fa 100644
--- a/src/main/java/com/palnet/comn/collection/AuthCollection.java
+++ b/src/main/java/com/palnet/comn/collection/AuthCollection.java
@@ -1,16 +1,17 @@
 package com.palnet.comn.collection;
 
+import lombok.extern.slf4j.Slf4j;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.util.ArrayList;
-import java.util.List;
+import java.util.*;
 
+@Slf4j
 public class AuthCollection {
 
 	private Logger logger = LoggerFactory.getLogger(getClass());
 	
-	private static List<String> authkeyList = new ArrayList<String>();
+	private static Set<String> authkeyList = new HashSet<>() {};
 	
 	public void reloadAuthkey() {
 		// 인증키 하드코딩 처리
@@ -22,11 +23,13 @@ public class AuthCollection {
 	
 	public boolean checkAuthkey(String authKey) {
 		boolean result = false;
-//		logger.debug("authKey ::: " + authKey);
-	
-		for(String key : authkeyList) {
-//			logger.debug("key ::: " + key);
-			if(authKey.equals(key)) {
+
+//		Iterator<String> keys = authkeyList.iterator();
+
+		for (Iterator<String> iterator = authkeyList.iterator(); iterator.hasNext();) {
+			String item = iterator.next();
+
+			if(authKey.equals(item)) {
 				result = true;
 			}
 		}