Abstract:In order to build an efficient secure storage system,based on the analysis of the current access control model,the artificial immune algorithm was introduced and the immunity-based light access control model for secure storage system named IBLSAC was proposed.Firstly the artificial immune algorithm and its characters were analyzed.Then the definition of elements in IBLSAC and the structure of IBLSAC were given.The main algorithms in IBLSAC such as diversity selection algorithm and access request checking algorithm were described.The properties of IBLSAC were analyzed from safety,cost and adaptability aspects.At last the prototype of IBLSAC was realized,and using different threshold,the number of detectors needed to check out all illegal access requests was tested when the size of self set was different.The result shows that IBLSAC has good safety with low and stable consumption and can be used to realize a secure storage system,which can keep high I/O performance.