Gerald Madlmayr is mobile consultant dealing especially with contactless and UICC-based applications as well as security and privacy in such systems. In 2009 he was named the 'NFC-Guru' by Nokia.
geri-m | 22 October, 2008 19:35
One of the most important features of an NFC device, is its Card Emulation capability. Thru the handset, the Smartcard gets a display, a keyboard to interact with and even a network connection. Ticket or Cash thus can be transferred over-the-air (OTA) to the mobile device and be stored there in the secure chip, until the Card Emulation Functionality is used. Thus today I’d like to give some examples how NFC Application for Ticketing or Payment could work:
Ticketing
The user first touches a smartposter with his NFC Handset. The NFC Handset is able to read the tag that is sticked from behind to the poster. The NDEF on the Tag redirects the Handset browser to an online store, where the ticket can be purchased. The ticket then is stored in an online ticket server, with a reference to the credentials stored in the secure chip. When the user touches the reader at the gate, the credentials are retrieved by the reader. Then the systems checks whether there is a ticket available and then grants the access.
Payment
The value of the wallet is read in the beginning by the vending machine (34,12 EUR). Then the user chooses a product (I don't know why the button actually is pressed twice.) and the pays simply by putting the handset to the reader. Then you see the amount of 33,12 EUR at the wallet (1 EUR for a coke, that okay isn't it?). When you again waive the handset in front of the vending machine, the display shows 33,12 EUR. And it's the same for the coffee machine: choose product, wave phone in front of reader (integrated into coffee machine).
Wallet
This video show an NFC Wallet (J2ME) on a Samsung x700n. When the handset is held to the reader in the coffee machine in the beginning, the value (16,52 EUR) is read out of the secure element by the coffee machine (only the coffee machine with the correct access keys can do that!). Then the user starts the wallet applications. It shows -- as we already know -- that the wallet contains the amount of 16,52 EURs.Then the user chooses to top up 10 EUR. The money is then loaded securly into the secure element of the phone. During this operation, the secure element is access "internal" (thru the J2ME application) At the end of the month, the money topped out is billed to the consumer thru his mobile phone bill. At the end, the handset is again in tag emulation mode and the value is read by the coffee machine (26,52 EUR).
Information Exchange
We use this service at our campus: it's called information take-way and uses the NFC peer-2-peer mode. The user first has to select the information yunks he wants to receive in an online portal. At the kiosk, he has just top open the application (due to some design issues of the phone this has to be done manually) on the phone and put it on the kiosk. The the information is syncrhonized with the mobile and the user can read the information offline. We offer individual timetables for students, the different menus at the cafeteria and several news-feeds.
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