@misc{1148381, author = {Wayne A Jansen}, title = {A formal description of the SDNS Security Protocol at Layer 4 (SP4):}, year = {1992}, month = {1992-01-01 05:01:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NIST.IR.4792}, language = {en}, }