%A LV Jian-fu,LAI Ying-xu,LIU Jing %T Log Security Storage and Retrieval Based on Combination ofOn-chain and Off-chain %0 Journal Article %D 2020 %J Computer Science %R 10.11896/jsjkx.190200298 %P 298-303 %V 47 %N 3 %U {https://www.jsjkx.com/CN/abstract/article_18953.shtml} %8 2020-03-15 %X There are a large number of security device logs in the information system.These security device logs are very important for system monitoring,query,security auditing and fault diagnosis.Therefore,it is important to securely store and process the security device logs in the information system.This paper proposed a log security storage and retrieval model based on the combination of on-chain and off-chain.This model combines blockchain and distributed storage technology,achieves security log storage which is decentralized,detrusted, andhard to tamper with data,and provides a ciphertext retrieval interface to security administrators externally.At the same time, it can use blockchain technology to realize data integrity check.The security analysis demonstrates that the model can ensure the secure and reliable storage of security device logs,and the performance analysis proves that the model has good retrieval efficiency.