Secure transmission method of asymmetric encryption of blockchain data under trust degree

In order to solve the problem that blockchain data cannot be tampered with after being uploaded, which will increase the risk of privacy leakage, an asymmetric encryption and secure transmission method of blockchain data under trust is proposed. Through direct trust measurement and asymmetric key mechanism, data processing is optimized and transmission security is enhanced. Authenticate encrypted data in the blockchain organization, distribute key information, determine the number of transmission rounds, and design a secure transmission method. Through the simulation experiment on Ethereum platform, the data encryption and decryption processing ability and node identity authentication ability under different encryption methods are compared and analyzed. The experimental results show that the encryption and decryption rate of asymmetric encryption method considering trust is close to the standard packet rate, and the maximum value of data packet is 461 byte and the minimum value is 399 byte, which is always within the predetermined standard range, showing high processing efficiency and security. The accuracy of authentication is 97.5%, the recall rate is 98.1%, and the F1 score is 0.977. It is proved that this method can effectively improve the security of data transmission and network performance, while maintaining the high efficiency of data processing.