diff --git a/src/tse/lr4/Utils.java b/src/tse/lr4/Utils.java
new file mode 100644
index 0000000..42c87f0
--- /dev/null
+++ b/src/tse/lr4/Utils.java
@@ -0,0 +1,29 @@
+package tse.lr4;
+
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+/**
+ *
+ * @author aNNiMON
+ */
+public class Utils {
+
+    public static String md5(String s) {
+        try {
+            MessageDigest digest = java.security.MessageDigest.getInstance("MD5");
+            digest.update(s.getBytes());
+            byte[] messageDigest = digest.digest();
+
+            StringBuilder hexString = new StringBuilder();
+            for (int i = 0; i < messageDigest.length; i++) {
+                hexString.append(Integer.toHexString(0xFF & messageDigest[i]));
+            }
+            return hexString.toString();
+
+        } catch (NoSuchAlgorithmException e) {
+            e.printStackTrace();
+        }
+        return "";
+    }
+}