Method of and apparatus for providing multi-level security access to system

摘要

A software system provides security against unauthorized operations initiated by software code supplied by an untrusted source. The allowed operations that are associated with the software code are determined. A thinned interface is generated which permits the software code to successfully call only the allowed operations. The software code is independent of a security environment of the system. The thinned interface operates in at least one version of the security environment. The software code and the thinned interface are activated within the system.