B. Security Aspects of NFC
At first it should be stated that though the communication
is short range and with the concern of user interaction, it does
not really ensure secure communication [3]. One of the
common concerns with NFC technology is data corruption or
data manipulation. This may occur when a third party
intercepts the signal being sent and tries to alter it which may
leads to modification of data or corruption of data [8]. The
removal of NFC tag from the tagged item or wrapping the tag
in metal foil causing to shield RF signal may also lead to unrecognizing of the tag[5]. Another aspect is the data
insertion in which the attacker inserts messages into the data
exchange between two devices. But this is possible only in
case that the answering device needs a very long time to
answer. If the inserted data can be transmitted before the
original device starts with the answer then only insertion will
be successful[9]. For detecting errors in NFC it uses the CRC
technique (Cyclic Redundancy Check) which permits devices
to check whether the received data has been corrupted or not