The Internet of Medical Things (IoMT) global market has grown and developed significantly in recent years, and the number of IoMT devices is increasing every year. IoMT systems are now very popular and have become part of our everyday life. However, such systems should be properly protected to preventing unauthorized access to the devices. One of the most popular security methods that additionally relies on real-time communication is Blockchain. Moreover, such a technique can be supported by the Trusted Third Party (TTP), which guarantees data immutability and transparency. The research and industrial community has predicted the proliferation of Blockchain-based IoMT (BIoMT), for providing security, privacy, and effective insurance processing. A connected environment comprises some of the unique features of the IoMT in the form of sensors and devices that capture and measure, recognize and classify, assess risk, notify, make conclusions, and take action. Distributed communication is also unique due to the combination of the fact that the Blockchain cannot be tampered with and the Peer-to-Peer (P2P) technique, especially compared to the traditional cloud-based techniques where the reliance of IoMT systems on the centralized cloud makes it somewhat vulnerable. This paper proposes a Blockchain-based technique oriented on IoMT applications with a focus on maintaining Confidentiality, Integrity, and Availability (the CIA triad) of data communication in the system. The proposed solution is oriented toward trusted and secure real-time communication. The presented method is illustrated by an example of a cloud-based hospital application. Finally, the security aspects of the proposed approach are studied and analyzed in detail.

A novel prototyping technique for concurrent control systems implemented in FPGA devices is proposed in the paper. The method allows for dynamic modification of the implemented system. It means that the functionality of a part of the controller can be changed, while the rest of the system is still running. The approach applies to UML state machine diagrams as a specification of the system. Contrary to other methods, the presented concept requires neither major changes to the design, nor the application of external, specialized tools. The proposed idea has been experimentally verified with the use of Xilinx FPGAs

An idea for a hardware realization of a space vector modulation in the direct matrix converter is proposed in the paper. The method is oriented towards the implementation in a low-cost FPGA. The traditional algorithms usually involve digital signal processors, which drive the large number of power transistors and “non-standard positions of control pulses” during the switching sequence. Thus, hardware implementations have become popular since particular operations are performed faster and more efficiently. This paper proposes a novel hardware algorithm for a matrix converter switch control. Contrary to the existing hardware methods, the presented technique does not require specialized modelling tools, nor advanced converters to achieve the hardware representation. Furthermore, the proposed solution permits concurrent computation of most operations. The method has been verified experimentally. The results of the hardware implementation in a low-cost FPGA are discussed.

The paper presents a method of using the UML state machine diagrams for specification of programs of logic controllers. The proposed method allows transformation from UML state machine diagram, using temporal Hierarchical Concurrent Finite State Machine (HCFSM) model, into Verilog hardware specification. The generated behavioral description in Hardware Description Language can afterwards be simulated, synthesized and implemented into e.g. FPGA device. A practical example illustrating the successive stages of the proposed method was also presented.