Opearting Systems: Case Study 3
In a multiprogramming and time sharing environment, several users share a system simultaneously. In effect, security problems may arise in this kind of system. A good example are copying or cloning a user's files and by hacking the system. This phenomenon leads to the ineffectiveness and reliability of multiprogramming and time sharing environment. However, exploiting this security problems, let us have first the definition of the two terms used which we are referring this security problems. Multiprogramming is the allocation of a computer system and its resources to more than one concurrent or existing application, job or user. And for time sharing systems or environment is the sharing of a computing resources among many users by means of multiprogramming and multitasking. It was introduced in the 1960's time, and emergence as the prominent model of computing in the 1970's period time. Now, unfolding the first security problem occurred in multiprogramming and time sharin...