Research on the security of e-commerce transactions and data privacy system with block chain technology

The national secret algorithm is used to transform Hyperledger Fabric platform. In this paper, the existing standard protocol Hyperledger Fabric1.4 based on federated chain is replaced by encryption algorithms such as SM2, SM3 and SM4. Then, the blockchain network, Fabric-CA, and Fabric-SDK are reconstructed respectively. This project designs a security mechanism suitable for encrypted blockchain transaction information. SM4 symmetric cryptography is used to encrypt the user's private information, so that only traders can obtain private information. The validity period of bidding documents is tested by SM2 public key cryptography. Finally, this paper will complete the improvement of the encryption algorithm on Hyperledger Fabric platform. The practical application and performance verification of the designed super ledger Fabric platform are carried out. Experiments show that the algorithm proposed in this paper has successfully completed the reconstruction of state secrets on the super ledger Fabric software platform. Its operation efficiency and performance have reached the practical requirements.