diff --git a/Chaos/Cipher/Block/Des/DesCrypt.hpp b/Chaos/Cipher/Block/Des/DesCrypt.hpp
index 6d6c7cf..203af24 100644
--- a/Chaos/Cipher/Block/Des/DesCrypt.hpp
+++ b/Chaos/Cipher/Block/Des/DesCrypt.hpp
@@ -226,6 +226,12 @@ public:
     {
         friend class DesCrypt;
     public:
+        Key(const Key & other) = delete;
+        Key(Key && other) = delete;
+
+        Key & operator=(const Key & other) = delete;
+        Key & operator=(Key && other) = delete;
+
         template<typename InputIt>
         Key(InputIt keyBegin, InputIt keyEnd)
         {