工业数据库通常包含大量敏感信息，为了保护数据安全，需要对不同用户或用户组设置不同的权限。然而，由于安全访问控制过程易受冗余数据、维度差异等问题的干扰，导致控制时间较长，控制效果不理想。因此，提出区块链下工业数据库访问多级安全控制算法。采用线性拟合算法填补工业数据库中的缺失值，采用局部性嵌入算法(Locally Linear Embedding，LLE)降维处理工业数据，缩减数据之间的无效规模，完成数据预处理。将处理后数据存储至区块链中，实现一级控制。利用多授权属性加密方案，实现数据的细粒度访问二级控制，完成工业数据库访问的多级安全控制。实验结果表明，所提算法的计算开销小、安全性强，且控制耗时最长仅为 20ms。
Simulation of Multi level Security Control for Industrial Database Access under Blockchain
Industrial databases typically contain a large amount of sensitive information,and in order to protect da-ta security,different permissions need to be set for different users or user groups.However,due to the susceptibility of the security access control process to interference from redundant data,dimensional differences,and other issues,the control time is relatively long and the control effect is not ideal.Therefore,this article presented a multi-level security control algorithm for industrial database access under blockchain.The linear fitting algorithm was adopted to fill miss-ing values in industrial databases at first.And then,locally linear embedding(Locally Linear Embedding,LLE)algo-rithm was used to reduce the dimension of industrial data and the invalid scale between data,thus completing data preprocessing.Moreover,the processed data were stored in the blockchain to achieve first-level control.Finally,multi-authorization attribute encryption scheme was used to achieve the secondary control for fine-grained access of data,thus completing multi-level security control of industrial database access.The experimental results show that the pro-posed algorithm has small computational overhead and high security.The longest control time is only 20ms.
Data fillingData dimensionality reductionBlockchain multi-chain combinationIdentity keyHash value
万方数据
维普
