diff --git a/diy4.py b/diy4.py
new file mode 100644
index 0000000..ba8af7e
--- /dev/null
+++ b/diy4.py
@@ -0,0 +1,22 @@
+import random
+
+# 私钥
+key = "abcdefgh使用编程实现位移替换加密，制作密码机关真是太好玩了哈哈！"
+# 要加密语句
+message = "诺依，周末一起去看动漫展吧！"
+key_message="" 
+# 请使用私钥key，对message进行加密
+noise="uioitoserteo[-r]o"
+for i in message:
+    str1=i
+    str2=random.choice(key)
+    str3=random.choice(key)
+    test=str1+str2+str3
+    key_message=key_message+test
+list_message=list(key_message)
+index=random.randint(0,len(key_message))
+list_message.insert(5,noise)
+result_message="",join(list_message)
+print(key_message)
+
+