Research On Data Protection Of Regulated Blockchain E-commerce Transactions

With the rapid development and application of blockchain technology in e-comerce transactions,security issues such as user privacy information leakage are becoming increasingly prominent.How to protect transaction sensitive information when traders are not anonymous has always been a research hotspot in blockchain e-commerce transaction privacy protection.However,the strengthening of privacy in e-commerce transactions makes it difficult to establish regulatory agencies,and there is no balance between transaction privacy protection and security supervision.Therefore,this article analyzes the transaction scenarios of blockchain e-commerce,studies the privacy protection and supervision of blockchain e-commerce transactions by using elliptic curve homomorphic encryption,PVC pedersen commitment,secure two-parties multiplication calculation and attribute encryption technology,and put forward the corresponding solution.The main work includes the following two aspects:(1)Aiming at the problem of transaction amount confidentiality in e-commerce blockchain,the privacy of transaction amount is protected under the condition that the trader is not anonymous,so that all nodes in the whole network can verify the legitimacy of ciphertext transaction.Based on the publicly verifiable PVC digital commit-ment and zero knowledge proof technology,this article proposes a public and confi-dential verification scheme for blockchain transaction amount,Reduction the confi-dentiality verification of the transaction amount to the PVC digital commitment based on zero-knowledge proof,so that the private information will not be leaked during the transaction verification process,thereby improving the privacy and security of block-chain transactions.At the same time,the elliptic curve homomorphic encryption fea-ture is used to encrypt the transaction amount,so as to realize the real-time update of the trader's ciphertext account book.(2)In view of the current contradiction between the privacy protection and su-pervision of e-commerce blockchain transactions,this article implements the supervi-sion of blockchain encrypted transactions based on the encryption method of cipher-text strategy attributes.At the same time,it abandons the previous transaction super-vision scheme that requires a trusted third party to generate the key,and uses the se-cure two-parties multiplication calculation to generate the key in the scheme.This scheme not only realizes the supervision of blockchain transactions,but also generates keys without the participation of a trusted third party,so as to reduce the risk of pri-vacy disclosure of blockchain transactions.Compared with the existing blockchain privacy protection and supervision scheme,it is concluded that the scheme has the advantages of high efficiency and strong security.