TY - GENERIC DO - 10.20944/preprints201611.0092.v1 UR - http://dx.doi.org/10.20944/preprints201611.0092.v1 TI - A Semi-Formal Multi-Policy Secure Model for Semantic Spatial Trajectories T2 - Preprints AU - Wang, Xingang PY - 2016 DA - 2016/11/17 PB - Preprints