NFC Mobile Payment
NFC stands for Near Field Communication, a short-range wireless communication technology. It was initiated by Philips and jointly promoted by renowned manufacturers such as Nokia and Sony. NFC evolved from the integration of contactless radio frequency identification (RFID) and interoperability technologies. It combines the functions of an inductive reader, an inductive card, and point-to-point communication on a single chip, enabling identification and data exchange with compatible devices over short distances. Initially, this technology was a simple merger of RFID and network technologies, but it has since evolved into a short-range wireless communication technology with rapid development.
When an NFC chip is installed in a smartphone, the device can perform small-scale electronic payments and read information from other NFC devices or tags. NFC’s short-range interaction significantly simplifies the entire authentication and identification process, making communication between electronic devices more direct and clear. Through NFC, multiple devices such as computers, digital cameras, smartphones, and PDAs can establish wireless connections quickly and conveniently, enabling data exchange and service provision.
NFC-enabled devices can exchange data in either active or passive mode. In passive mode, the device initiating NFC communication, also known as the NFC initiator (master device), provides the radio frequency field throughout the communication process. It can select one of three transmission speeds—106 kbps, 212 kbps, or 424 kbps—to send data to another device. The other device, known as the NFC target device (slave device), does not need to generate an RF field but uses load modulation technology to transmit data back to the initiator device at the same speed. This communication mechanism is compatible with contactless smart cards based on ISO 14443A, MIFARE, and FeliCa. Therefore, in passive mode, the NFC initiator device can detect contactless smart cards or NFC target devices using the same connection and initialization process and establish a connection with them.
In active mode, each device must generate its own radio frequency field when sending data to another device. As shown in the figure, both the initiator device and the target device generate their own radio frequency fields to enable communication. This is the standard mode for peer-to-peer network communication, enabling very fast connection setup.
RFID Mobile Payment
RFID stands for Radio Frequency Identification, also known as electronic tags, which is a contactless automatic identification technology. It identifies specific targets and reads/writes related data via radio signals without requiring mechanical or optical contact between the identification system and the target. It operates without human intervention, is suitable for various harsh environments, can identify high-speed moving objects, can simultaneously identify multiple tags, and is quick and convenient to use. Second-generation ID cards and Olympic tickets are embedded with RFID chips, and the ETC electronic toll collection system on highways also uses RFID technology.
China Mobile’s RFID SIM card is similar to the public transportation smart card used in Beijing and other cities. It records the balance of the mobile wallet and exchanges data for card-based transactions through an integrated RFID chip. The merchant’s mobile payment POS machine acts as the reader, while the consumer’s mobile phone RFID chip serves as the tag. In fact, public transportation smart cards also have built-in RFID chips, but the difference is that mobile wallets can achieve wireless recharging and remote settlement through cooperation between mobile operators and banks, enabling the entire process from recharging to consumption to be completed using a single mobile phone.
In reality, through RFID-enabled mobile phones, mobile operators function as a consumer payment platform, similar to internet third-party payment platforms like Alipay on Taobao or Tenpay on Tencent. However, smartphones are far more widespread and user-friendly than computers, and with a massive user base, once mobile payments mature like in Japan and South Korea, the operators’ massive capital accumulation benefits and transaction fee revenues are easy to imagine. Operators use smartphones as a medium to directly connect users to the e-commerce market and fulfill all e-commerce functions.
Carrying a mobile phone equipped with an RFID SIM card, users can first “swipe” their phone to purchase breakfast at Starbucks or McDonald’s, then swipe their phone to ride the subway, and upon arriving at the Expo site, swipe their phone to verify their electronic ticket. While touring the venues, if they feel thirsty, they can also swipe their phone at vending machines to purchase beverages and water. This is mobile payment, where the mobile phone card has integrated functions of public transportation cards, supermarket cards, and even bank cards. This is merely a basic application of RFID; RFID will support the rise of the entire IoT industry. A complete and secure RFID-based GPRS mobile payment system consists of five components: mobile terminals, communication networks, mobile secure transaction systems, banks (or application service providers), and certification authorities (CA).
Among these, mobile terminals include RFID tags, smartphones capable of running Java-based mobile payment software, and POS machines capable of reading RFID tags. RFID cards and RFID POS machines belong to the RFID subsystem. RFID POS machines use RFID technology to read user information and connect to the mobile payment platform via PSTN, GPRS, or other methods. Mobile users utilize Java-based mobile payment software to exchange information with the mobile payment platform via the GPRS network and complete the payment.
The RFID subsystem consists of RFID tags, RFID readers, and RFID application support software systems. Each user holds RFID tags divided into master tags and slave tags. The master tag is affixed inside the mobile phone casing, while the slave tag has the same appearance as a standard magnetic card and is used in environments where the mobile phone is unsuitable. Due to the lack of online support from the mobile phone, the slave tag supports fewer business types compared to the master tag, primarily focusing on small-amount offline payment transactions. Based on the characteristics of mobile payment services, the storage space within the RFID tag can be divided into: application identification directory zone, issuance zone, user personal information zone, mobile payment service zone, and other business application reserved data zone. The data in the application identification directory zone primarily includes: chip serial number, issuing institution IC card issuance authority national registration number, issuing institution IC card application national registration number, read/write permissions, etc.
ISO/IEC 14443A NFC Tags – Compatible with Google Pay for Seamless Mobile Payments
Circular NFC Tags – Seamless Compatibility with iPhone and Other NFC Devices
NFC technical advantages
NFC initially combined remote identification and network technology, but has now evolved into a wireless connectivity technology. It can quickly and automatically establish a wireless network, providing a “virtual connection” for cellular devices, Bluetooth devices, and Wi-Fi devices, enabling electronic devices to communicate within a short-range area. NFC’s short-range interaction significantly simplifies the entire authentication and identification process, making communication between electronic devices more direct, secure, and clear, eliminating various electronic interferences. NFC helps solve the hassle of remembering multiple passwords by combining all identity recognition applications and services on a single device, while also ensuring data security.
Like RFID, NFC information is transmitted through electromagnetic induction coupling in the wireless frequency portion of the spectrum, but there are significant differences between the two. First, NFC is a wireless connectivity technology that provides easy, secure, and fast communication. Its transmission range is smaller than RFID, which can reach several meters or even tens of meters. However, due to NFC’s unique signal attenuation technology, it offers advantages such as shorter distance, higher bandwidth, and lower power consumption compared to RFID. Second, NFC is compatible with existing contactless smart card technology and has become an officially recognized standard supported by an increasing number of major manufacturers. Third, NFC is a short-range connection protocol that enables seamless, secure, fast, and automatic communication between various devices. Compared to other connection methods in the wireless world, NFC is a short-range, private communication method. Finally, RFID is primarily used in production, logistics, tracking, and asset management, while NFC plays a significant role in access control, public transportation, and mobile payments.
Additionally, NFC outperforms infrared and Bluetooth transmission methods. As a consumer-oriented transaction mechanism, NFC is faster, more reliable, and much simpler than infrared. Compared to Bluetooth, NFC is designed for short-range transactions and is suitable for exchanging important data such as financial information or sensitive personal information; Bluetooth compensates for NFC’s limited communication range and is suitable for longer-distance data communication. Therefore, NFC and Bluetooth complement each other and coexist. In fact, the lightweight NFC protocol can be used to facilitate the Bluetooth pairing process between two devices, thereby promoting the use of Bluetooth.
NFC-enabled smartphones are equipped with NFC chips, which form part of the RFID module. These chips can function as passive RFID tags for payment purposes or as RFID readers for data exchange and collection. NFC technology supports various applications, including mobile payments and transactions, peer-to-peer communication, and mobile information access. Through NFC phones, people can connect with the entertainment services and transactions they desire at any location, at any time, using any device, thereby completing payments, obtaining poster information, and more. NFC devices can function as contactless smart cards, smart card readers/writers, and device-to-device data transmission links. Their applications can be primarily categorized into four basic types: payment and ticketing, electronic ticketing, smart media, and data exchange/transmission.
RFID-SIM Technology Advantages
(1) Strong system privacy and support for multiple business types. By adopting RFID technology, the system can automatically read user information from RFID tags without requiring manual input, so users do not need to directly provide their phone numbers during the payment process, thereby better protecting their privacy. Additionally, due to RFID’s storage and identification capabilities, the system supports a wider range of business types. It not only enables daily card-based consumption functions but also supports offline payments, electronic ticketing, and other features, while also providing personal identification functionality.
(2) Simple operation, strong networking and real-time online capabilities, high security, and low costs. Currently, the vast majority of mobile phones support Java technology. Mobile payment programs written in Java not only enable encryption and authentication functions but also provide more intuitive and visual guidance for users to perform quick operations. Therefore, they are significantly superior to current SMS or voice-based methods in terms of operability and security. Additionally, using GPRS as the communication method offers clear advantages over SMS or USSD in terms of transmission speed, real-time online capability, data encryption, and communication costs. At the same time, it fully utilizes the existing data service resources of the GSM network.
(3) The system structure is simple, with low technical implementation difficulty, making it more suitable for China’s national conditions. There is no need for major modifications to the currently operational mobile payment system; simply adding an RFID data support system and a GPRS gateway to the mobile payment platform allows for the full utilization of existing mobile network resources. It does not require users to replace their mobile devices with NFC-enabled terminals, serving as a transitional solution before NFC technology matures and NFC-enabled mobile devices become widely adopted. This facilitates operators in swiftly launching mobile payment services, capturing the market, and cultivating a customer base.
Differences between NFC and RFID
Like RFID, NFC transmits information through electromagnetic induction coupling via the wireless frequency portion of the spectrum. However, there are significant differences between the two technologies.
1. NFC is a wireless connectivity technology that provides easy, secure, and fast communication. Its transmission range is smaller than that of RFID, which can reach several meters or even tens of meters. However, NFC employs unique signal attenuation technology, giving it advantages over RFID in terms of shorter distance, higher bandwidth, and lower power consumption.
2. NFC is compatible with existing contactless smart card technology and has become an officially recognized standard supported by an increasing number of major manufacturers.
3. NFC is a short-range connection protocol that enables easy, secure, fast, and automatic communication between various devices. Compared to other connection methods in the wireless world, NFC is a short-range, private communication method.
4. RFID is primarily used in production, logistics, tracking, and asset management, while NFC plays a significant role in access control, public transportation, and mobile payments.