Proxy re-signature scheme with cryptographic reverse firewall for medical data security

To enhance the security of medical data, the government and healthcare institutions must collect and analyze vast amounts of information, enabling the prompt detection of irregular patterns and timely issuance of accurate warnings. This is crucial for preventing and containing potential threats to medical data security. However, securely sharing and converting these data poses a significant challenge, particularly in open wireless access networks within healthcare settings. Proxy re-signature (PRS) offers not only signature conversion capabilities but also anonymity, safeguarding data reliability and authenticity. Nonetheless, current proxy re-signature techniques overlook the potential for algorithm substitution attacks (ASA). Therefore, we introduce a novel proxy re-signature scheme, leveraging cryptographic reverse firewall (CRF) technology, tailored specifically for the medical domain. Furthermore, we conducted rigorous security analysis and simulation experiments to validate the practical effectiveness of our scheme. This approach addresses the need for secure data sharing among various entities, including medical institutions, management centers, and research facilities, ensuring the integrity and confidentiality of critical medical information.