@phdthesis{us-1164,
  title = {Nonmonotonic cryptographic protocols},
  author = {Aviel D. Rubin},
  year = {1994},
  url = {https://hdl.handle.net/2027.42/104026},
  researchr = {https://researchr.org/publication/us-1164},
  cites = {0},
  citedby = {0},
  school = {University of Michigan, USA},
}