In the field of Internet of Things middleware, this paper analyses the challenges to build application support platform and reviews the current research work. The paper presents a solution combining hardware and software on the basis of hybrid middleware architecture. The solution is designed to enrich interface types of access gateway, improve the flexibility of middleware architecture, and enhance user programming performance through graphical programming. Finally, the process of developing and deploying applications with application support platform is introduced through test experiments, which shows the practicability of application support platform.
With the development of the Internet of Things, the world is entering an era of interconnection. Some typical application scenarios, such as environmental monitoring, energy management, space equipment operation and maintenance, require gateways to integrate multiple heterogeneous networks, such as WiFi, Bluetooth, Zigbee, LoRa and other wireless LAN and wired LAN. However, the interfaces of existing gateways are different and incompatible with each other, which makes difficult to achieve the requirements of heterogeneous interconnection. Therefore, this paper presents a smart integrated access gateway with modular architecture, which consists of a motherboard and multi-type user cards with pluggable functions. Different user cards can provide different communication interfaces and adapt corresponding communication protocols, by which different network customizations can be achieved in combination. Compared with other research work, the gateway is more configurable customizable and flexible.
Supervisory Control and Data Acquisition (SCADA) system is the core component of the cryogenic propellant loading process control system, used to collect field data in real time and monitor and control scattered field devices. Aiming at the lacking authentication capabilities and other security measures of SCADA system, we proposed a lightweight security authentication scheme mainly using Cryptography for SCADA system. Based on symmetrical encryption technology and message authentication code (HMAC) technology, the proposed scheme could achieve bidirectional identity authentication and message confidentiality between the control server and the controller which could guarantee the availability, confidentiality, integrity of the transmitted data between different devices. Our scheme could also resist security threats such as replay attacks.
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