General introduction of RFID:

RFID (Radio Frequency Identification) technology is a technology that identifies objects by radio waves, allowing a device to read information contained in the chip at a long distance, without direct contact, without making any communication. physics between two invisible objects. RFID technology allows us to transmit and receive data from one location to another.
RFID technology uses wireless communication in the radio frequency band to transmit data from tags to readers. Tags can be attached or attached to recognized objects such as products. product, box or shelf. The reader scans the data of the tag (tag) and sends the information to a database containing the tag's data.
RFID Frequency ranges:
Each frequency range and technology applied in RFID has different levels of information security and reading range suitable for different RFID applications in practice:
  - Security:
    Access control.
    Management process: Libraries, schools, …
    . . .
    . . .
  - Monitoring:
    Supply chain: control in the warehouse.
    People or animals: children, patients, athletes, livestock.
    Asset: luggage on the plane, goods, equipment, tools . . . eTickit:
    ETC.
    eTicket, prepaid card
    Credit