diff --git a/IOFileClass/FileManIOFile.cpp b/IOFileClass/FileManIOFile.cpp
index 424d704..bee2ebe 100644
--- a/IOFileClass/FileManIOFile.cpp
+++ b/IOFileClass/FileManIOFile.cpp
@@ -74,41 +74,33 @@ void FileManIOFile::read(std::string key){
 void FileManIOFile::write(std::string key,std::string data){
 
     AESCrypt aes;
-    HASHCrypt hash;
     std::string dataEncrypted;
 
     dataEncrypted=aes.encrypt(key, data);
 
+    this->writeRoutine(data, dataEncrypted);
 
-    byte digest[16];
-    hash.getMD5_128(data, digest, sizeof(digest));
-
-
-    std::ofstream file;
-    file.open(this->filename, std::ios::out | std::ios::binary);
-
-    file.write((char *) digest,sizeof(digest));
-
-
-    file.write(dataEncrypted.c_str(), dataEncrypted.size());
-
-
-
-    file.close();
-
-    this->data=data;
 
 }
 
 void FileManIOFile::write(std::string data){
-
+    if(not(this->readable)){
+        std::cout << "Can't write data without key (read it before) !" << std::endl;
+        std::exit(EXIT_FAILURE);
+    }
     AESCrypt aes;
-    HASHCrypt hash;
     std::string dataEncrypted;
 
     dataEncrypted=aes.encrypt(this->key, data);
+    this->writeRoutine(data, dataEncrypted);
 
 
+}
+
+
+void FileManIOFile::writeRoutine(std::string data, std::string dataEncrypted){
+    HASHCrypt hash;
+
     byte digest[16];
     hash.getMD5_128(data, digest, sizeof(digest));
 
@@ -126,9 +118,10 @@ void FileManIOFile::write(std::string data){
     file.close();
 
     this->data=data;
-
 }
 
+
+
 std::string FileManIOFile::getData(){
     return this->data;
 }
diff --git a/IOFileClass/FileManIOFile.hpp b/IOFileClass/FileManIOFile.hpp
index 310ded9..7013b27 100644
--- a/IOFileClass/FileManIOFile.hpp
+++ b/IOFileClass/FileManIOFile.hpp
@@ -50,18 +50,36 @@ class FileManIOFile {
         */
         void read(std::string key);
 
+
         /**
-        * @brief Read encrypted file.
+        * @brief Write data in encrypted file.
         *
         * @param key : key to encrypt data
+        * @param data : data to write
         *
-        * Save data to "filename" attribute.
+        * Write the file with or without key
+        * To write data without key, you need to read it before (to save the key
+        * in attribute key;
         *
         */
         void write(std::string key, std::string data);
         void write(std::string data);
 
 
+        /**
+        * @brief Write data in encrypted file.
+        *
+        * @param data : data to write (for MD5)
+        * @param dataEncrypted : data to write
+        *
+        * Write encryptedData to filename
+        *
+        */
+        void writeRoutine(std::string data, std::string dataEncrypted);
+
+
+
+
         /**
         * @brief True if file fully decrypted.
         *