Research on the application of uBlock wheel function in privacy protection of blockchain data transmission

Blockchain technology operates on a distributed ledger and decentralized basis, making transaction information open to the public and untampered with. However, this feature makes it possible to leak the user’s identity information when the transaction information is disclosed, thus destroying the user’s anonymity. To this end, a blockchain data transmission protection method based on uBlock round function is proposed. Through the intelligent filling technology, the plaintext data within each block reaches the specific length required for the uBlock round function encryption. Based on this length requirement, a set of uBlock round functions with complex substitution and substitution transformation is designed. By performing multiple rounds of uBlock round function encryption operations, combined with an effective tamper prevention mechanism and a secure transmission protocol, the blockchain data is effectively transformed into an unpredictable random number sequence, ensuring the integrity and security of data transmission in the offline state on the basis of encryption. The experimental results show that under the application of the research method, the two test samples showed a higher security level in the protection of data privacy, both above 50 bits. This proves the great potential and practical application value of this research method in improving the security of offline transmission of blockchain data.