Abstract：In cloud storage service,the secure storage and deletion of files is one of the most concern issues for users,so it has been the focus in this research.For files cannot be deleted thoroughly in the cloud storage system,which may lead to file leak,policy-based file encryption storage and deletion mechanism is proposed in this paper.This mechanism introduces data key and control key,and it can effectively resists collusion attacks through the multilevel key management.The policy is used to access control key,while it is cancelled,the corresponding key is deleted,and file secure deletion is realized finally.Theoretical analysis and simulation experiments showed that,compared with the original method,this mechanism increases the files security of the cloud storage,moreover decreases the space and time cost.
李杰,李景峰,房方. 云存储中文件加密存储和删除方法研究[J]. 小型微型计算机系统, 2015, 36(4): 836-839.
LI Jie,LI Jingfeng,FANG Fang. Research of File Encryption Storage and Deletion Mechanism in Cloud Storage. Journal of Chinese Computer Systems, 2015, 36(4): 836-839.
2015, Vol. 36 
