diff --git a/Chaos/Cipher/Stream/Arc4/Arc4Gen.hpp b/Chaos/Cipher/Stream/Arc4/Arc4Gen.hpp
index b2c6173..a89ebf7 100644
--- a/Chaos/Cipher/Stream/Arc4/Arc4Gen.hpp
+++ b/Chaos/Cipher/Stream/Arc4/Arc4Gen.hpp
@@ -18,6 +18,12 @@ public:
         : IsInitialized_(false)
     { }
 
+    Arc4Gen(const Arc4Gen & other) = delete;
+    Arc4Gen(Arc4Gen && other) = delete;
+
+    Arc4Gen & operator=(const Arc4Gen & other) = delete;
+    Arc4Gen & operator=(Arc4Gen && other) = delete;
+
     template<typename InputIt>
     Arc4Gen(InputIt keyBegin, InputIt keyEnd)
     {