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NFC acts as a vital catalyst – a stable, intuitive wireless connectivity technology facilitating two-way interaction between electronic devices. Mobile phones enable individuals to easily communicate with friends, family, colleagues, etc. Yet, with NFC (Near-Field Communications) applications, mobile phones seamlessly integrate into daily life. For instance, simply tapping another mobile phone allows information exchange, ticket purchases for shows, and payment for purchases.
Exploring the wonders of NFC technology
What is NFC technology?
NFC (Near-Field Communications) is a short-range wireless connectivity technology operating within a range of approximately 4 cm, utilizing magnetic field induction to establish connections between devices through direct contact or proximity. NFC operates at a frequency of 13.56 MHz and achieves a maximum data transfer speed of 424 Kbps. Due to its short data transmission range, NFC transactions are considered secure. NFC was standardized by ISO/IEC in late 2003. In March 2004, Nokia, Sony, and NXP established the NFC Forum to develop this technology. NFC technology emerged from the amalgamation of contactless identification technology and new access connection technologies. NFC encompasses 4 card formats based on ISO 14443 Type A, 14443 Type B, and ISO 18092 standards.
NFC technology operates in 2 data transmission modes: active and passive. In passive mode, the transmitting device emits a field to the receiving device. In this mode, the receiving device is passive and only responds when it receives a signal from the transmitting device. In active mode, both the transmitting and receiving devices exchange data by generating their own fields.
Most modern applications combine both active and passive modes, as it is beneficial for devices to transmit data between devices without power sources, such as contactless cards.
A transaction over NFC follows sequential steps: Discovery, Authentication, Negotiation, Transfer, and Acknowledgment.
For highly sensitive applications, such as enhancing security during transactions, NFC technology introduces 2 encryption standards: Advanced Encryption Standard (AES) and Triple Data Encryption Standard (Triple DES). AES is a block encryption algorithm adopted by the United States as a standard encryption method. Triple DES encrypts data three times with three different keys, making it longer and more secure.
The primary purposes of using NFC are:
- 1. Connecting with electronic devices.
2. Accessing digital content; users simply need to place their mobile phones near radio frequency (RF) tags attached to advertisements to instantly receive relevant information.
3. Contactless transactions, such as payments and ticket purchases.
NFC technology is poised to revolutionize device usage habits for everyone. Theoretically, NFC offers numerous applications, such as its integration into mobile phones, digital cameras, TVs, or GPS systems for convenient bill payments while shopping. Users can simply tap their credit card on the NFC-enabled computer screen to make purchases. With NFC-equipped smartphones, your device transforms into a key, concert ticket, or personal information storage card. Additionally, users can access discount information or promotions by tapping their NFC-enabled phones near smart advertising billboards, exchanging business cards via NFC-supported phones, or sending and receiving photos on screens or computers. With NFC-integrated smartphones, you can buy and receive tickets and scan cards. Then, you can check your account balance directly on your smartphone.
NFC introduces a trend of peer-to-peer data exchange. Operating at a frequency of 13.56 MHz, NFC does not interfere with other wireless connectivity technologies. When the NFC network is activated, users can still utilize other connectivity technologies like Bluetooth or Wi-Fi for longer-range connections or when transmitting large amounts of data.
NFC technology promises to advance further and hold more potential than radio-frequency identification (RFID) tags, playing a significant role in leveraging financial services on mobile devices for mobile network operators (MNOs) and smartphone designers.
Although NFC protocols vary, they are generally considered more flexible and secure compared to RFID or smart cards. The main difference is that NFC is integrated into mobile devices for linking to retail services or financial transactions.
Moreover, ensuring data transmission security is crucial, making NFC on mobile devices more than just a technology or application but an entire ecosystem. NFC on mobile devices is identified as a critical factor for payment solutions by Amex, Mastercard, and VISA. NFC deployment is underway in Europe, similar to the widespread adoption of contactless technology in public transportation systems worldwide. A smartphone integrating an electronic security device generates random hardware-based passwords, which could be a universal integrated circuit card (UICC) – an ideal platform for NFC applications. UICC runs SIM applications in GSM networks and USIM applications in 3G/UMTS networks. Each UICC can include multiple applications, allowing access to both 2G and 3G networks, storing contacts, and running other applications.
Currently, about 14 mobile network operators have jointly developed NFC applications, with these 14 operators commanding up to 40% of the global mobile market. These operators include Bouygues Telecom, China Mobile, Cingular Wireless, KPN, Mobilkom Austria, Orange, SFR, SK Telecom, Telefonica Moviles Espana, Telenor, TeliaSonera, Telecom Italia Mobile (TIM), Vodafone, and 3.
What sets NFC apart from other wireless technologies? NFC, or Near Field Communication, stands out as a unique wireless technology for its close-range data transmission capabilities.
- Bluetooth is a wireless technology designed to transmit data to devices like smartphones, laptops, and other peripherals within a range of 10 meters.
- Wi-Fi technology, used for local area networks (LANs), enables network expansion or replaces wired networks within approximately 100 meters.
- ZigBee is a wireless technology capable of controlling and monitoring industrial applications and residential areas within a range exceeding 100 meters.
- IrDA, or Infrared Data Association, is a short-range wireless communication standard (<1 meter) that transmits data via infrared rays. IrDA interfaces are commonly used in computers and...
- RFID, or Radio-Frequency Identification, is an automatic identification method that allows remote data storage and retrieval based on radio-frequency tags. RFID tags are attached to products. The RFID system consists of two components: the tag containing a silicon chip and antenna, and the reader that communicates with the tag and transfers data to the central computer system.
- Contactless smart cards integrate a chip for data transmission to the reader using RFID technology. For example, smart cards transmit data via ISO/IEC 14443 and FeliCa standards within a range of approximately 10 cm.
