Säkerhet och integritet i närfältskommunikation
DatavetenskapComputer science - electronic securityComputer science - networks and communicationsSäkerhetsteknikSecurity engineeringNfcMifareSmartcardSecurity
Context. In today?s society we use smart cards in many areas, NFC is a smart
card technology that allows contactless interaction between a reader and the
tag, the tag is often in the form of a card. NFC can be used for various
payment methods or as access card to a building which makes life easier. In
previous studies, the technique has proven to be weak to attacks using an NFC
reader connected to a computer. Among today?s
smartphones, there are phones that have built-in read and write support for NFC
tags. Objectives. In this study, I examine the NFC tags that are frequently
used in our society, entry cards and debit cards to determine the security
against the increasing use of
smartphones as a potential attack tool. If there is a threat I will try to
remedy the found lack.
Methods. My approach was to select a number of test items and analyze the
objects using only a smartphone with NFC support to determine the risk for each
of the items. The test conducted was the modification, cloning and unique copy.
Results. Through this investigation, I concluded that four of the non-empty
items was
at risk of being intimidated. All four are used in public transport and the
objects were vulnerable to unique copy. Conclusions. In order to remedy this
vulnerability should be the management of the tag?s data is handled in a
different way, perhaps by storing the data in a internal system or to replace
the tags for a safer tag alternative.