diff --git a/diy4.py b/diy4.py
new file mode 100644
index 0000000..02ccb4b
--- /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 = input("请输入你的乱码：")
+
+# 请使用私钥key，对message进行加密
+d=""
+for i in message:
+    random.choice(key)
+    str1=i
+    str2=random.choice(key)
+    str3=random.choice(key)
+    text=str1+str2+str3
+    a=text
+    d=a+d
+list1=list(d)
+index=random.randint(0,len(list1))
+list1.insert(index,"ghgjufuitfhiog")
+a="".join(list1)
+print(a)