Hunion Traceability: A New Type of Blockchain Traceability System Based on SM2, SM3 and SM4

Data traceability with the great serviceability has been widely used in various scenarios. However, the existing traceability mechanism often applies internationally accepted cryptographic algorithms such as MD5 and RSA in the data transmission process. These algorithms have been confirmed to have certain loopholes in security. This paper proposes a traceability system based on SM2, SM3, and SM4 algorithms. We establish a certificate issuance verification mechanism to improve the data transmission security performance of the traceability system based on SM2 and SM3. At the same time, the system uses the SM4 algorithm to design a blockchain interaction scheme using data digest, and uses homomorphic encryption to verify the correctness of the data. In addition, we also replaced the SM2 in the system with the RSA, and the SM3 with the MD5 to test the pros and cons of the two different algorithm systems in terms of security performance and execution efficiency. The test results show that the traceability mechanism based on SM2, SM3, and SM4 performs 1-2 seconds faster than the traceability mechanism based on RSA and MD5 in terms of average transaction response time. At the same time, SM2, SM3, and SM4 also have better security performance.