Internet applications and the use of other information technologies in the health sector are called e-Health, which aims to improve the flow of medical information through electronic means, optimizing the provision of services and the management of health systems. The challenges related to exchanging medical data between organizations revolve around the protection, confidentiality and privacy of patients’ sensitive and personal data (Lavina, 2018; Shi et al., 2020). Blockchain is an appropriate technology to mitigate these risks due to its characteristics of transparency, decentralization and immutability (Kim et al., 2022). Therefore, the goal of this work is to evaluate, through a systematic literature review (SLR), the use of blockchain to guarantee data privacy and security in e-Health systems. The methodology adopted is based on the recommendations of (Kitchenham & Charters, 2007)...

Blockchain technology requires evaluating the current state of interoperability between its platforms, to improve efficiency of the activities that are carried out and enable innovation and new services. Solutions have been proposed to facilitate interoperability between platforms, including Cross-chain technologies, which can be understood as a communication protocol. Some interoperability solutions present problems, e.g., being limited to the exchange of assets, inefficiency in complex scenarios, and introducing a centralizing element of trust that contradicts the principle of decentralization of blockchain networks. Interoperability depends on studies on decentralized consensus, Cross-chain security, and standardized mechanisms that ensure that platforms, regardless of their structural differences, can interact in a secure, efficient, and scalable manner. Therefore, a study on the sta...