A Security Model Based on Lattice

In order to protect confidentiality and integrity of information in the computer information systems, in general, we need to follow some security polices to access and handle information. The BLP model only to resolve the confidentiality problem, and the Biba model only to resolve the integrity problem, other models are also all similar, they can´t make look after two sides at the same time. In this paper, based on the set of sensitivity labels for security model comes into being lattice order theory in math, we put forward a lattice security model, which is composed of BLP model and Biba model of information flow. At the same time, it can keep the information confidentiality and integrity. There will be a active effect for information security model theory research by design the new model of information flow lattice.