Security analysis of systems with simple trajectories of functioning within the base role DP-model

In the paper, we consider computer systems with only simple trajectories of functioning and with the any number of the cooperated user sessions that do not get access owning to each other by using the information flows by memory to essences functionally associated with the user sessions. For these systems, the conditions for transfering access rights and realizing information flows by memory are formulated and proved within the base role DP-model.