@InProceedings {dqs.sec98,
    author = {S. Dawson and S. Qian and P. Samarati},
    booktitle = {Proc. of the 14th IFIP TC-11 International Conference on Information Security},
    title = {Secure Interoperation of Heterogeneous Systems: A Mediator-Based Approach},
    address = {Vienna, Budapest},
    month = {August},
    year = {1998}
}