A Regulatable Mechanism for Transacting Data Assets

Blockchain technology is widely used in data asset transactions. Especially for the private data that cannot be circulated to unauthorized receivers. Thus, ensuring that the transaction records and data contents can be audited and traced is necessary. On the basis of bilinear mapping, we constructs a triple receiver public key encryption scheme as a regulatable data asset transaction mechanism and a blockchain data asset transaction platform, digital asset exchange protocol. In the scheme, the sender uses its private key and the public keys of the three receivers to encrypt a message. Then the three receivers can use their private keys to decrypt, independently. We prove that, if the gap bilinear Diffie-Hellman problem and the computational Diffie-Hellman problem are difficult, the proposed examples have chosen plaintext attack security and adaptive chosen ciphertext attack security, respectively. Moreover, the security reduction of our scheme is compact and has no reduction loss. Compared with the duple receiver encryption scheme proposed by Diameter, our scheme has a similar decryption speed. Besides, we adds an important function that the sender and the three receivers can decrypt independently. Eventually, evaluations show that our scheme has decentralized and trust management regulation capabilities and is suitable for data asset transactions in the IoT.