diff --git a/src/main/java/nlib/cmm/crypto/AriaCrypto.java b/src/main/java/nlib/cmm/crypto/AriaCrypto.java
index ad15b8a2..11d07982 100644
--- a/src/main/java/nlib/cmm/crypto/AriaCrypto.java
+++ b/src/main/java/nlib/cmm/crypto/AriaCrypto.java
@@ -40,11 +40,6 @@ public class AriaCrypto {
 	
 	private static final Logger log = LoggerFactory.getLogger(AriaCrypto.class); 
 	
-    /**
-     * 암호처리 시, 기본 키 
-     */
-    private static String ARIA_DEFAULT_KEY = NlibProperty.getProperty("crypto.aria.defaultKey");
-    
     /**
      * 기본키를 가지고 암호화한다. 
      * 
@@ -73,11 +68,9 @@ public class AriaCrypto {
      * @return
      */
     public static String encodeEgov(String value) {
-    	log.info("encode : 암호화에 사용할 키 정보가 없으므로 기본키 정보를 사용합니다 : " + ARIA_DEFAULT_KEY);
-    	return encodeEgov(value, ARIA_DEFAULT_KEY);
+    	return encodeEgov(value, NlibProperty.getProperty("crypto.aria.defaultKey"));
     }
     
-    
 	/**
 	 * 전달받은 key(사용자고유번호 혹은 메일주소 등 salt값)로 Egov 모듈을 사용하여 암호화한다. 
 	 * 
@@ -137,8 +130,7 @@ public class AriaCrypto {
      * @return
      */
     public static String decodeEgov(String value) {
-    	log.info("decode : 복호화에 사용할 키 정보가 없으므로 기본키 정보를 사용합니다 : " + ARIA_DEFAULT_KEY);
-    	return decodeEgov(value, ARIA_DEFAULT_KEY);
+    	return decodeEgov(value, NlibProperty.getProperty("crypto.aria.defaultKey"));
     }
 
 	/**
diff --git a/src/main/java/nlib/cmm/crypto/AriaUtil.java b/src/main/java/nlib/cmm/crypto/AriaUtil.java
index c4c79fbd..5d79863f 100644
--- a/src/main/java/nlib/cmm/crypto/AriaUtil.java
+++ b/src/main/java/nlib/cmm/crypto/AriaUtil.java
@@ -20,7 +20,6 @@ import nlib.cmm.service.NlibProperty;
 public class AriaUtil {
 
 	private static final Logger log = LoggerFactory.getLogger(AriaUtil.class); 
-	public static final String PRIVATE_KEY = NlibProperty.getProperty("crypto.aria.defaultKey");
 
 	public static String ariaEncrypt(String str, String privateKey) 
 			throws InvalidKeyException, UnsupportedEncodingException {
@@ -62,8 +61,12 @@ public class AriaUtil {
 		try {
 			int offset = 0;
 			int numRead = 0;
-			while (offset < b.length && (numRead=fis.read(b, offset, b.length-offset)) >= 0) {
-				offset += numRead;
+			while (offset < b.length && (numRead=fis.read(b, offset, b.length-offset)) >= 0 ) {
+				if( (offset + numRead) <= Integer.MAX_VALUE) {
+					offset += numRead;
+				} else {
+					throw new IOException(f.getName() + " too long.");
+				}
 			}
 			if (offset < b.length) {
 				throw new IOException(f.getName());
@@ -84,11 +87,13 @@ public class AriaUtil {
 		try {
 			fos.write(c);
 		} catch (IOException e) {
-
+			log.error(e.toString());
 		} finally {
 			try {
 				fos.close();
-			} catch (IOException e) {}
+			} catch (IOException e) {
+				log.error(e.toString());
+			}
 		}
 	}
 
@@ -104,11 +109,8 @@ public class AriaUtil {
 		AriaEngine instance = new AriaEngine(256, privateKey);
 
 		c = AriaEngine.hexToByteArray(strHex);
+		if(c == null) return null;
 		
-		if(c == null)
-		{
-			return null;
-		}
 		p = new byte[c.length];
 		instance.decrypt(c, p, p.length);
 
@@ -131,7 +133,11 @@ public class AriaUtil {
 			int offset = 0;
 			int numRead = 0;
 			while (offset < b.length && (numRead=fis.read(b, offset, b.length-offset)) >= 0) {
-				offset += numRead;
+				if( (offset + numRead) <= Integer.MAX_VALUE) {
+					offset += numRead;
+				} else {
+					throw new IOException(f.getName() + " too long.");
+				}
 			}
 			if (offset < b.length) {
 				throw new IOException(f.getName());
@@ -153,11 +159,13 @@ public class AriaUtil {
 		try {
 			fos.write(c); 
 		} catch (IOException e) {
-
+			log.error(e.toString());
 		} finally {
 			try {
 				fos.close();
-			} catch (IOException e) {}
+			} catch (IOException e) {
+				log.error(e.toString());
+			}
 		}
 	}
 
@@ -179,7 +187,7 @@ public class AriaUtil {
 		if (strHex==null || strHex.equals("")) return "";
 		StringBuffer buf = null;
 		try {
-			String privateKey = PRIVATE_KEY;
+			String privateKey = NlibProperty.getProperty("crypto.aria.defaultKey");
 			
 			byte[] p;
 			byte[] c;
@@ -208,7 +216,7 @@ public class AriaUtil {
 	public static String ariaEncrypt(String str) 
 	throws InvalidKeyException, UnsupportedEncodingException {
 		if (str==null || str.equals("")) return "";
-		String privateKey = PRIVATE_KEY;
+		String privateKey = NlibProperty.getProperty("crypto.aria.defaultKey");
 
 		byte[] p;
 		byte[] c;
@@ -233,7 +241,7 @@ public class AriaUtil {
 	public static String ariaCharEncrypt(String str, String charset) 
 	throws InvalidKeyException, UnsupportedEncodingException {
 		if (str==null || str.equals("")) return "";
-		String privateKey = PRIVATE_KEY;
+		String privateKey = NlibProperty.getProperty("crypto.aria.defaultKey");
 		byte[] p;
 		byte[] c;
 		AriaEngine instance = new AriaEngine(256, privateKey);
@@ -258,8 +266,8 @@ public class AriaUtil {
 	throws InvalidKeyException, UnsupportedEncodingException {
 		if (str==null || str.equals("")) return "";
 		String privateKey = "";
-		if(server.equals("regi")) privateKey = PRIVATE_KEY;
-		else privateKey = PRIVATE_KEY;
+		if(server.equals("regi")) privateKey = NlibProperty.getProperty("crypto.aria.defaultKey");
+		else privateKey = NlibProperty.getProperty("crypto.aria.defaultKey");
 
 		byte[] p;
 		byte[] c;
@@ -285,7 +293,7 @@ public class AriaUtil {
 	public static String ariaCharDecrypt(String strHex,  String charset) 
 	throws InvalidKeyException, UnsupportedEncodingException  {
 		if (strHex==null || strHex.equals("")) return "";
-		String privateKey = PRIVATE_KEY;
+		String privateKey = NlibProperty.getProperty("crypto.aria.defaultKey");
 
 		byte[] p;
 		byte[] c;
@@ -293,10 +301,7 @@ public class AriaUtil {
 
 		c = hexToByteArray(strHex);
 		
-		if(c == null)
-		{
-			return null;
-		}
+		if(c == null) return null;
 		p = new byte[c.length];
 		instance.decrypt(c, p, p.length);
 
@@ -314,19 +319,15 @@ public class AriaUtil {
 	throws InvalidKeyException, UnsupportedEncodingException  {
 		if (strHex==null || strHex.equals("")) return "";
 		String privateKey = "";
-		if(server.equals("regi")) privateKey = PRIVATE_KEY;
-		else privateKey = PRIVATE_KEY;
+		if(server.equals("regi")) privateKey = NlibProperty.getProperty("crypto.aria.defaultKey");
+		else privateKey = NlibProperty.getProperty("crypto.aria.defaultKey");
 		 
 		byte[] p;
 		byte[] c;
 		AriaEngine instance = new AriaEngine(256, privateKey);
 
 		c = hexToByteArray(strHex);
-		
-		if(c == null)
-		{
-			return null;
-		}
+		if(c == null) return null;
 		p = new byte[c.length];
 		instance.decrypt(c, p, p.length);