Computer and Network Security:Commercial cryptography applications, database security, file transfer encryption, key management and recovery, computer keys, copy‑protection floppy disks, encrypted storage devices, secure computers, and confidential communications, among others.

Network Security and Access Control:Firewalls, routers, VTPH gateways, anti‑spam solutions, intrusion detection systems, network antivirus, physical isolation, e‑government security, network security and management, combating computer viruses and worms, authentication and authorization.

Biometric Technologies:Iris recognition, retinal scanning, voice recognition, fingerprint identification systems, palm‑print and hand‑shape recognition, vein recognition, facial recognition, handwriting analysis, seal verification, and more.（Copyright of this content belongs to Juzhan. Reproduction without permission is prohibited.）

Other Areas:Additional topics include commercial cryptography and biometrics, along with practical experiences and case studies in finance, securities, taxation, national defense, public security, government, and other sectors.

Perception Frontend:RFID product lines, smart card offerings, barcode printers and scanners, biometric devices, security surveillance systems, sensors, sensor network nodes, core control chips and embedded microchips, communication technologies and related products.

Network Frontend:3G/4G, Bluetooth, Zigbee, ZIHAVE, NB‑IoT, GPS, GPRS, Wi‑Fi, WSN, and other communication technologies and devices.

Application Frontend:Cloud computing, middleware, mobile payments, real-time location tracking, smart homes, industrial automation, security systems, transportation, environmental protection, household appliances, healthcare, power supply, logistics, agriculture, water management, municipal services, automotive, aviation, libraries, mining, and other industries and fields where IoT applications are being implemented.