diff --git a/.idea/misc.xml b/.idea/misc.xml
index a165cb3..0c4841a 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectRootManager" version="2" default="false" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" default="false" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/src/crypto/Crypto.java b/src/crypto/Crypto.java
index 51d57b7..101a158 100644
--- a/src/crypto/Crypto.java
+++ b/src/crypto/Crypto.java
@@ -1,10 +1,84 @@
 package crypto;
 
+import java.io.*;
+import java.util.Arrays;
 import java.util.Scanner;
 
 public class Crypto {
+
+    private Scanner scn;
+    private FileWriter fw;
+
     public static void main(String[] args) {
-        Scanner scanner = new Scanner(System.in);
-	// write your code here
+        Crypto m = new Crypto();
+        m.startWithArgs(args);
+    }
+
+    public void startWithArgs(String[] args) {
+        if (args.length < 6) {
+            return;
+        }
+        String mode = "";
+        String data = "";
+        int key = 0;
+        if (!args[0].equals("-mode")) {
+            System.out.println("Bad args");
+            return;
+        } else {
+            mode = args[1];
+        }
+        if (!args[2].equals("-key")) {
+            System.out.println("Bad args");
+            return;
+        } else {
+            key = Integer.parseInt(args[3]);
+        }
+        if (args[4].equals("-data")) {
+            data = args[5];
+        } else if (args[4].equals("-in")) {
+            try {
+                scn = new Scanner(new File(args[5]));
+                while (scn.hasNextLine()) {
+                    data += scn.nextLine() + "\n";
+                }
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        } else {
+            scn = new Scanner(System.in);
+            data = scn.nextLine();
+        }
+        if (args.length > 6) {
+            if (args[6].equals("-out")) {
+                try {
+                    fw = new FileWriter(new File(args[7]));
+                    fw.write(data);
+                    fw.flush();
+                    fw.close();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+            }
+        } else {
+            System.out.println(data);
+        }
+
     }
+
+    public String encrypt(String message, int key) {
+        StringBuilder result = new StringBuilder();
+        for (int i = 0; i < message.length(); i++) {
+            result.append((char)(message.charAt(i) + key));
+        }
+        return result.toString();
+    }
+
+    public String decrypt(String message, int key) {
+        StringBuilder result = new StringBuilder();
+        for (int i = 0; i < message.length(); i++) {
+            result.append((char)(message.charAt(i) - key));
+        }
+        return result.toString();
+    }
+
 }