SRMDS: Secure and Reliable Medical Data Sharing Using Hybrid Cryptography with Block Chain in E-Health Systems

Abstract

Abstract Medical data sharing can help to enhance diagnostic accuracy where security and privacy protection are critical to the e-Health system. Nowadays, blockchain (BC) has been proposed as a promising solution to achieve the sharing of personal health information (PHI) because of its merit of immutability. However, privacy preserving of the patients and security of PHI sharing are further to be improved. Thus, a secure and reliable medical data sharing (SRMDS) system is presented in this paper. This system includes hybrid cryptography, private BC and Consortium BC (CBC). To enhance the privacy preserving of each patient, their PHI is encrypted using advanced encryption standard (AES) and the AES key is encrypted using adaptive elliptic curve cryptography (AECC). The ciphertexts of PHI and AES key are stored as block to the private BC of the hospital. Besides, keyword of PHI is forwarded to the CBC. The doctor can access the private BC to recover the PHI of a patient by checking the keyword of corresponding PHI. Simulation results illustrate that the proposed SRMDS based e-Health system improves the security and privacy preserving of patient by decreasing encryption time, decryption time and storage overhead.