diff --git a/Chaos/Cipher/Block/Mode/Ecb.hpp b/Chaos/Cipher/Block/Mode/Ecb.hpp
index 95d004e..07e19c4 100644
--- a/Chaos/Cipher/Block/Mode/Ecb.hpp
+++ b/Chaos/Cipher/Block/Mode/Ecb.hpp
@@ -30,6 +30,12 @@ public:
     class Encryptor
     {
     public:
+        Encryptor(const Encryptor & other) = delete;
+        Encryptor(Encryptor && other) = delete;
+
+        Encryptor & operator=(const Encryptor & other) = delete;
+        Encryptor & operator=(Encryptor && other) = delete;
+
         Encryptor(const typename CipherT::Key & key)
             : Encryptor_(key)
             , BlockBytesPacked_(0)