A security concept for OLAP

A data warehouse collects and integrates data from multiple, autonomous, heterogeneous sources with the purpose of efficiently implementing decision support or OLAP queries. Much working data warehousing has been performed on view materialization and data integration, we focus on access and security management in OLAP and N-dimensional cube. Since data in data warehouse are valuable and an important cooperate resource, we define a security model for data warehouses which describes security constrains for roles in the data warehouse. Each user in the data warehouse has a role and each role has a security constrain list that builds the security profile of the role. According these role profile the user is authorized to query data from the data warehouse