RFID Java Card Application
The RFID Java card application mainly involves the read and write operations of M1 cards (such as S50/S70), combined with Java technology to achieve data exchange and management. The following are typical application scenarios and key technical implementation points:
1、 Application scenarios
Access control and identity recognition
Java card implements employee attendance and permission control through RFID reader, supports dynamic key management and data encryption.
Public transportation payment: such as bus cards and subway cards, Java programs handle the transaction logic and balance updates of high-frequency RFID cards.
Logistics and asset management: Tracking goods through ultra-high frequency RFID tags (such as EPC codes), Java backend parsing data and synchronizing to database 23.
2、 Technical implementation
Use Java Socket communication to connect RFID card reader, and send hexadecimal instructions through TCP/IP protocol to read EPC or write data blocks.
Data format conversion: Need to handle the conversion between byte arrays and hexadecimal strings
Security mechanism: M1 card needs to authenticate the sector key through PCD_Authentice(), and Java implements dynamic key generation and verification.
4、 Precautions
Frequency selection: High frequency (13.56MHz) is suitable for access control/payment, and ultra-high frequency (860-960MHz) is suitable for logistics tracking.
Localization trend: By 2025, domestically produced RFID devices (such as security doors and smart bookshelves) will have integrated Java SDK and support secondary development.