A Blockchain-Based End-to-End Data Protection Model for Personal Health Records Sharing: A Fully Homomorphic Encryption Approach[J] SENSORS 2023(23) Vanin, Fausto Neri da Silva Policarpo, Lucas Micol Righi, Rodrigo da Rosa Heck, Sandra Marlene da Silva, Valter Ferreira Goldim, Jose da Costa, Cristiano Andre