NFC is called Near Field Communication in full. As a wireless connection technology with convenient connection and strong security, this technology has already entered the Door security, bus, subway and mobile payment, and is also widely used in the field of smart home. In recent years, there have been increasing numbers of cars supporting NFC door opening function. With the popularization of technology, just like the Keyless Entry and Start System (PEPS) replacing traditional mechanical keys, using a phone with NFC function as the car key to open the doors will also replace the commonly used PEPS.

In terms of convenience, PEPS technology only requires the key to be placed in the pocket and the car door can be opened directly after being close to the car. NFC technology requires the phone to be taken out of the pocket and placed in the corresponding position. It seems that NFC technology has an additional step of taking out a phone when opening the door compared to PEPS technology, but it can save the keys in our pockets, liberate our pockets, and avoid forgetting to bring the car keys, after all, we don't forget to bring our phones when we go out now. NFC technology can also share the car's door opening permissions with family members to avoid commuting back and forth due to key handover.

In terms of security, PEPS technology and NFC technology both have similar methods such as bidirectional authentication and data encryption, which are equally effective in data confidentiality. However, the high-frequency signals of long-distance communication using PEPS technology may be exploited by criminals. The NFC certification distance is generally within 10cm, so criminals cannot tamper with the communication process.

When the NFC chip is embedded in the car Door security, the car owner can use the mobile phone or other devices that support NFC technology to unlock and start the door. The specific steps are as follows:

1. The car owner places their phone or other NFC device near the door equipped with an NFC chip.

2. The NFC chip will read the encrypted data stored in the vehicle owner's device and verify its identity.

If the identity verification is successful, the NFC chip will send an unlock signal to the car door to unlock it.

4. After entering the vehicle, the owner should place their phone or other NFC device next to the start button equipped with an NFC chip.

5. The NFC chip performs identity verification again. If the identity verification passes, it sends a start signal to the vehicle to achieve engine start.

In addition, NFC technology can also interact with vehicle safety and intelligent systems to achieve more functions. For example:

1. NFC technology can interact with the vehicle's GPS system to help owners locate the vehicle's location and obtain route information.

2. NFC technology can interact with the vehicle's intelligent audio system to achieve remote control of music playback and volume adjustment functions.

3. NFC technology can also provide car owners with more convenient payment methods, such as refueling, parking and payment through mobile NFC.

Joinet's NFC technology application solution is built using chip technology at the vehicle specification level, and has the following characteristics:

 1. Excellent card inspection distance, up to 10cm;

2. Supports multiple protocols, including ISO/IEC 14443 A/MIFARE, ISO/IEC 14443 B, FeliCa, and ISO/IEC 15693;

3. It has excellent low-power performance, and the average current of the NFC chip can reach μ Level A;

4. Adopting a design that separates the control board and antenna board, making it convenient for car manufacturers to use their own antennas for testing.