diff --git a/qaesencryption.cpp b/qaesencryption.cpp
index 4001dfe..a21e087 100644
--- a/qaesencryption.cpp
+++ b/qaesencryption.cpp
@@ -398,13 +398,16 @@ QByteArray QAESEncryption::encode(const QByteArray &rawText, const QByteArray &k
     QByteArray expandedKey = expandKey(key);
     QByteArray alignedText(rawText);
     QByteArray ivTemp(iv);
+    QByteArray ofbTemp;
 
     //Fill array with padding
     alignedText.append(getPadding(rawText.size(), m_blocklen));
 
     //Preparation for CFB
-    if (m_mode == CFB)
+    if (m_mode == CFB || m_mode == OFB)
         ret.append(byteXor(alignedText.mid(0, m_blocklen), cipher(expandedKey, iv)));
+    if (m_mode == OFB)
+        ofbTemp.append(cipher(expandedKey, iv));
 
     //Looping thru all blocks
     for(int i=0; i < alignedText.size(); i+= m_blocklen){
@@ -423,6 +426,15 @@ QByteArray QAESEncryption::encode(const QByteArray &rawText, const QByteArray &k
                 ret.append(byteXor(alignedText.mid(i+m_blocklen, m_blocklen),
                                    cipher(expandedKey, ret.mid(i, m_blocklen))));
             break;
+        case OFB:
+            if (i+m_blocklen < alignedText.size())
+            {
+                ret.append(byteXor(alignedText.mid(i+m_blocklen, m_blocklen),
+                                   cipher(expandedKey, ofbTemp.mid(i-m_blocklen, m_blocklen))));
+                ofbTemp.append(cipher(expandedKey, ofbTemp.mid(i-m_blocklen, m_blocklen)));
+            }
+
+            break;
         default:
             //do nothing
             break;
diff --git a/qaesencryption.h b/qaesencryption.h
index 9717812..5c34557 100644
--- a/qaesencryption.h
+++ b/qaesencryption.h
@@ -17,7 +17,8 @@ public:
     enum Mode {
         ECB,
         CBC,
-        CFB
+        CFB,
+        OFB
     };
 
     enum Padding {
@@ -132,9 +133,9 @@ private:
 
     // The round constant word array, Rcon[i], contains the values given by
     // x to th e power (i-1) being powers of x (x is denoted as {02}) in the field GF(2^8)
-    //Only the first 14 elements are needed
+    // Only the first 14 elements are needed
     const quint8 Rcon[256] = {
-        0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, /*0x4d, 0x9a,
+        0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab/*, 0x4d, 0x9a,
         0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39,
         0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a,
         0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8,