diff --git a/src/main/java/step1/Main.java b/src/main/java/step1/Main.java
index 64c1895..b0e9b36 100644
--- a/src/main/java/step1/Main.java
+++ b/src/main/java/step1/Main.java
@@ -9,11 +9,13 @@ import java.io.*;
 import java.net.*;
 import java.nio.charset.StandardCharsets;
 import java.security.NoSuchAlgorithmException;
+import java.security.NoSuchProviderException;
 import java.security.SecureRandom;
 import java.util.Base64;
 
 public class Main {
 
+    private static final String PROVIDER = "SunJCE";
     private static final String ALGORITHM = "DESede";
     private static final String TRANSFORMATION = "DESede/ECB/PKCS5Padding";
 
@@ -65,9 +67,9 @@ public class Main {
         }
     }
 
-    public static void send(Socket socket, String message) throws IOException {
+    public static void send(Socket socket, String data) throws IOException {
         OutputStream output = socket.getOutputStream();
-        output.write(String.format("%s\r\n", message).getBytes(StandardCharsets.UTF_8));
+        output.write(String.format("%s\r\n", data).getBytes(StandardCharsets.UTF_8));
         output.flush();
     }
 
@@ -75,9 +77,9 @@ public class Main {
         return reader.readLine();
     }
 
-    public static SecretKey get3DESKey() throws NoSuchAlgorithmException {
-        KeyGenerator keyGen = KeyGenerator.getInstance(ALGORITHM);
-        keyGen.init(168);
+    public static SecretKey get3DESKey() throws NoSuchAlgorithmException, NoSuchProviderException {
+        KeyGenerator keyGen = KeyGenerator.getInstance(ALGORITHM, PROVIDER);
+        keyGen.init(new SecureRandom());
         return keyGen.generateKey();
     }