Test data for Regulatable Mechanism for Transacting Data Assets

Blockchain technology is widely used in data asset transactions. Especially for the private data of the public, such data cannot be circulated to unauthorized receivers, it is necessary to ensure that the transaction records and data contents can be audited and traced. In this paper, based on bilinear mapping, we construct a triple receiver public key encryption scheme as a regulatable data asset transaction mechanism, and construct a blockchain data asset transaction platform, namely Digital Asset Exchange Protocol. In the triple receiver public key encryption scheme, the sender uses its private key and the public keys of the three receivers to encrypt the message, and then the three receivers can use their private keys to decrypt independently. The above process does not require interaction among participants to realize Diffie-Hellman session key calculation. Through formal proof, we prove that if the gap bilinear Diffie-Hellman problem and the computational Diffie-Hellman problem are difficult, the proposed examples has chosen plaintext attack security and adaptive chosen ciphertext attack security, respectively. In addition, the security reduction of the triple receiver public key encryption scheme is compact and there is no reduction loss. Compared with the duple receiver encryption scheme proposed by Diameter, the proposed scheme has a similar decryption speed, but it adds an important additional function, that is, the sender and the three receivers can decrypt independently. Eventually, evaluations show that the proposed scheme has both decentralized and trust management regulation capabilities, and is suitable for data asset transactions in the IoT.

区块链技术在数据资产交易中得到了广泛应用。尤其是对于公共领域的私密数据，此类数据不得随意流转至未经授权的接收者手中，因此确保交易记录和数据内容可审计且可追溯显得尤为必要。在本研究中，基于双线性映射，我们构建了一种可调节的数据资产交易机制——三接收者公钥加密方案，并构建了区块链数据资产交易平台，即数字资产交换协议。在该三接收者公钥加密方案中，发送者利用其私钥及三个接收者的公钥对消息进行加密，随后三个接收者可独立使用各自的私钥进行解密。上述过程无需参与者间进行交互即可实现Diffie-Hellman会话密钥计算。通过形式化证明，我们证实了当差分双线性Diffie-Hellman问题和计算性Diffie-Hellman问题是难以解决的问题时，所提出的方案分别具有选择明文攻击安全和自适应选择密文攻击安全。此外，该三接收者公钥加密方案的安全性降低是紧凑的，且不存在降低损失。与Diameter提出的双接收者加密方案相比，本方案在解密速度上具有相似性，但增添了重要附加功能，即发送者和三个接收者均能独立解密。最终，评估结果显示，所提出的方案兼具去中心化和信任管理调控能力，适用于物联网中的数据资产交易。