TRUSTWORTHY DELEGATION TOWARD SECURING MOBILE HEALTHCARE CYBER-PHYSICAL SYSTEMS

摘要

The cryptosystem is initiated. The encryption system includes a key server, a first terminal, a second terminal, and a cloud server, and the key server generates a first master key, a second master key, a first public key, and a second public key, A secret key, a conversion key, and a confirmation key are generated, the confirmation key is transmitted to the first terminal, the secret key is transmitted to the second terminal, the conversion key is transmitted to the cloud server, and the second 1 The terminal encrypts the message to generate a cryptogram, generates a confirmation value using the confirmation key, and transmits the cryptogram and the confirmation value to the cloud server, and the cloud server partially decrypts the encrypted text to partially decrypt the encrypted text. The encrypted text is generated, the partially decrypted encrypted text and the confirmation value are transmitted to the second terminal, and the second terminal decrypts the partially decrypted encrypted text using the secret key.