ENCRYPTED DATA GENERATION DEVICE, DIGITAL SIGNATURE GENERATION DEVICE, DIGITAL SIGNATURE-ATTACHED DATA GENERATION DEVICE, AND DIGITAL SIGNATURE-ATTACHED DATA GENERATION SYSTEM

摘要

According to the embodiment, an encrypted data generation device includes one or more processors. The one or more processors generate a first hash value from plaintext data by a certain hash function, encrypt the plaintext data, and generate encrypted data. And the one or more processors transmit the first hash value and the encrypted data to an external device.