Sigma: security and interoperability for heterogeneous distributed systems

The DARPA ITO sponsored Sigma project was a three-year research effort (September 1995-September 1998) which investigated the integration and interoperation of security technologies into CORBA-based distributed computing environments. The focus of the effort was on architectures and technologies that allowed controlled, selective exchange of object-oriented services among enclaves, which differ in security policy, mechanism and assurance. The project produced several results that through technology transfer efforts are being used in multiple DARPA research efforts and a commercial product.