diff --git a/cipher.py b/cipher.py
new file mode 100644
index 0000000..2d1c471
--- /dev/null
+++ b/cipher.py
@@ -0,0 +1,61 @@
+import binascii
+import hashlib
+import base64
+
+from Crypto.Cipher import DES
+from Crypto.Random import get_random_bytes
+
+import rsa
+
+
+def des_key_encrypt_with_rsa():
+    # 读取 DES 密钥
+    with open('sandbox_sender/desPassword.txt', 'r') as des_password_gotcha:
+        des_pwd = des_password_gotcha.readline().strip()  # 移除换行符
+
+    # 读取公钥
+    with open('public_key_receiver.txt', 'r') as pub_key_radio:
+        public_key_pair_string = pub_key_radio.readline().strip()  # 移除换行符
+
+        # 假设公钥是以 `(n, e)` 格式存储
+        try:
+            public_key_pair_string2pair_step_1 = public_key_pair_string.split(', ')
+
+            public_key_pair_string2pair_step_2_a = public_key_pair_string2pair_step_1[0]
+            if public_key_pair_string2pair_step_2_a.startswith('('):
+                public_key_pair_string2pair_step_2_a = public_key_pair_string2pair_step_2_a[1:]
+
+            public_key_pair_string2pair_step_2_b = public_key_pair_string2pair_step_1[1]
+            if public_key_pair_string2pair_step_2_b.endswith(')'):
+                public_key_pair_string2pair_step_2_b = public_key_pair_string2pair_step_2_b[:-1]
+
+            # 转换成整数
+            n = int(public_key_pair_string2pair_step_2_a)
+            e = int(public_key_pair_string2pair_step_2_b)
+
+            # 打印输出以验证解析是否正确
+            #print(f"Parsed RSA public key: n = {n}, e = {e}")
+        except Exception as ex:
+            print(f"Error parsing the RSA public key: {ex}")
+            return
+
+    # 创建 RSA 公钥对象
+    try:
+        rsa_public_key = RSA.construct((n, e))  # 使用解析出的 (n, e) 创建 RSA 公钥
+        rsa_cipher = PKCS1_OAEP.new(rsa_public_key)
+
+        # 将 DES 密钥字符串编码为字节
+        des_pwd_bytes = des_pwd.encode()
+
+        # 使用 RSA 加密 DES 密钥
+        encrypted_des_pwd = rsa_cipher.encrypt(des_pwd_bytes)
+
+        # 将加密后的 DES 密钥转换为十六进制字符串
+        encrypted_des_pwd_hex = encrypted_des_pwd.hex()
+
+        # 将加密后的 DES 密钥保存到文件
+        with open('outbox/encrypted_pwd_des.txt', 'w') as encrypted_des_pwd_container:
+            encrypted_des_pwd_container.write(encrypted_des_pwd_hex)
+            print("DES password has been encrypted.")
+    except ValueError as ve:
+        print(f"Error while constructing RSA public key: {ve}")