How to Build Secure Industrial IoT Gateways: TLS/SSL, OpenVPN, and AES-256 Explained

In the rapidly evolving world of Industrial IoT (IIoT), ensuring the security of industrial gateways is paramount. As these gateways serve as the bridge between field devices and cloud systems, they are prime targets for cyberattacks. But how do we secure them effectively? The answer lies in leveraging robust encryption protocols like TLS/SSL, OpenVPN, and AES-256.

1. TLS/SSL: Secure Communication

TLS (Transport Layer Security) and SSL (Secure Sockets Layer) are cryptographic protocols used to secure communication between devices. They ensure that the data transmitted across the network is encrypted, making it unreadable to anyone without proper authorization. In IIoT, applying TLS helps to protect sensitive operational data from being intercepted during transit.2. OpenVPN: Secure Remote Access

2. OpenVPN: Secure Remote Access

OpenVPN allows secure, encrypted remote access to industrial networks. With OpenVPN, operators can safely access IIoT systems from anywhere in the world without exposing the network to security risks. It ensures that the communication between the remote device and the gateway is secure, even over insecure networks like public Wi-Fi.

3. AES-256: Robust Data Encryption

AES-256 is one of the most secure encryption algorithms used in IIoT applications. By encrypting data with 256-bit keys, it offers high resistance to brute-force attacks. AES-256 ensures that even if data is intercepted, it cannot be read or tampered with by unauthorized users, making it a critical component of IIoT security.

Beilai Technology's Secure IIoT Gateways

At Beilai, we offer secure IIoT solutions like the BL10 Series, designed with TLS/SSL, AES-256 encryption, and OpenVPN support, ensuring your industrial systems are protected.

• BL102 PLC to MQTT Gateway ✅ Core Security Features:

• TLS/SSL Encryption: Ensures secure Modbus/PLC data transmission, preventing eavesdropping and tampering..
• OpenVPN Support: Provides secure remote access, avoiding exposure of device ports.
• 4G/WiFi/Ethernet Multi-mode Communication: Suitable for Industrial Internet of Things (IIoT) scenarios.

Applicable Scenarios:

• Remote monitoring of industrial equipment (SCADA, MES system integration)
• Secure data transmission in smart factories

Conclusion: Security in IIoT is critical. With the right tools like TLS/SSL, OpenVPN, and AES-256, you can safeguard your data and devices. Beilai’s secure solutions give you the peace of mind to focus on optimizing your industrial operations.