diff --git a/module/mifare.cpp b/module/mifare.cpp
index b132be5..fccc46f 100644
--- a/module/mifare.cpp
+++ b/module/mifare.cpp
@@ -282,7 +282,7 @@ void Mifare::readAll()
                 if(result.indexOf("isOk:01") != -1)
                 {
                     keyBList->replace(i, tmpKey);
-                    data_syncWithKeyWidget(false, i, false);
+                    data_syncWithKeyWidget(false, i, KEY_B);
                 }
                 else
                 {
@@ -407,8 +407,8 @@ void Mifare::readAllC()
             }
             keyAList->replace(i, dataList->at(cardType.blks[i] + cardType.blk[i] - 1).left(12));
             keyBList->replace(i, dataList->at(cardType.blks[i] + cardType.blk[i] - 1).right(12));
-            data_syncWithKeyWidget(false, i, true);
-            data_syncWithKeyWidget(false, i, false);
+            data_syncWithKeyWidget(false, i, KEY_A);
+            data_syncWithKeyWidget(false, i, KEY_B);
         }
     }
 }
@@ -559,8 +559,8 @@ void Mifare::readAllE()
         }
         keyAList->replace(i, dataList->at(cardType.blks[i] + cardType.blk[i] - 1).left(12));
         keyBList->replace(i, dataList->at(cardType.blks[i] + cardType.blk[i] - 1).right(12));
-        data_syncWithKeyWidget(false, i, true);
-        data_syncWithKeyWidget(false, i, false);
+        data_syncWithKeyWidget(false, i, KEY_A);
+        data_syncWithKeyWidget(false, i, KEY_B);
 
     }
 }
@@ -626,7 +626,7 @@ void Mifare::data_syncWithDataWidget(bool syncAll, int block)
     }
 }
 
-void Mifare::data_syncWithKeyWidget(bool syncAll, int sector, bool isKeyA)
+void Mifare::data_syncWithKeyWidget(bool syncAll, int sector, KeyType keyType)
 {
     if(syncAll)
     {
@@ -638,7 +638,7 @@ void Mifare::data_syncWithKeyWidget(bool syncAll, int sector, bool isKeyA)
     }
     else
     {
-        if(isKeyA)
+        if(keyType == KEY_A)
             ui->MF_keyWidget->item(sector, 1)->setText(keyAList->at(sector));
         else
             ui->MF_keyWidget->item(sector, 2)->setText(keyBList->at(sector));
@@ -976,9 +976,9 @@ void Mifare::data_setData(int block, const QString &data)
     dataList->replace(block, data);
 }
 
-void Mifare::data_setKey(int sector, bool isKeyA, const QString &key)
+void Mifare::data_setKey(int sector, KeyType keyType, const QString &key)
 {
-    if(isKeyA)
+    if(keyType == KEY_A)
         keyAList->replace(sector, key);
     else
         keyBList->replace(sector, key);
diff --git a/module/mifare.h b/module/mifare.h
index 4d804b6..bb54d83 100644
--- a/module/mifare.h
+++ b/module/mifare.h
@@ -30,6 +30,12 @@ public:
     void dump();
     void restore();
 
+    enum KeyType
+    {
+        KEY_A,
+        KEY_B,
+    };
+
     enum DataType
     {
         DATA_INVALID,
@@ -84,7 +90,7 @@ public:
     bool data_isKeyValid(const QString &key);
     Mifare::DataType data_isDataValid(QString data);
     void data_syncWithDataWidget(bool syncAll = true, int block = 0);
-    void data_syncWithKeyWidget(bool syncAll = true, int sector = 0, bool isKeyA = true);
+    void data_syncWithKeyWidget(bool syncAll = true, int sector = 0, KeyType keyType = KEY_A);
 
     CardType cardType;
     Mifare::CardType getCardType();
@@ -104,7 +110,7 @@ public:
     void data_data2Key();
 
     void data_setData(int block, const QString &data);
-    void data_setKey(int sector, bool isKeyA, const QString &key);
+    void data_setKey(int sector, KeyType keyType, const QString &key);
     void lockC();
     void writeAllE();
     void readAllE();
diff --git a/ui/mainwindow.cpp b/ui/mainwindow.cpp
index 0ecf7b4..a6ba92f 100644
--- a/ui/mainwindow.cpp
+++ b/ui/mainwindow.cpp
@@ -337,26 +337,26 @@ void MainWindow::on_MF_keyWidget_itemChanged(QTableWidgetItem *item)
         QString key = item->text().replace(" ", "").toUpper();
         if(key == "" || mifare->data_isKeyValid(key))
         {
-            mifare->data_setKey(item->row(), true, key);
+            mifare->data_setKey(item->row(), Mifare::KEY_A, key);
         }
         else
         {
             QMessageBox::information(this, tr("Info"), tr("Key must consists of 12 Hex symbols(Whitespace is allowed)"));
         }
-        mifare->data_syncWithKeyWidget(false, item->row(), true);
+        mifare->data_syncWithKeyWidget(false, item->row(), Mifare::KEY_A);
     }
     else if(item->column() == 2)
     {
         QString key = item->text().replace(" ", "").toUpper();
         if(key == "" || mifare->data_isKeyValid(key))
         {
-            mifare->data_setKey(item->row(), false, key);
+            mifare->data_setKey(item->row(), Mifare::KEY_B, key);
         }
         else
         {
             QMessageBox::information(this, tr("Info"), tr("Key must consists of 12 Hex symbols(Whitespace is allowed)"));
         }
-        mifare->data_syncWithKeyWidget(false, item->row(), false);
+        mifare->data_syncWithKeyWidget(false, item->row(), Mifare::KEY_B);
     }
 }