system be totally secure

[osid]

Suppose you are provided with several computer systems on the market. The systems include hardware, system software, applications, operating systems, DBMS and many others. Is it possible to enhance one of the computer systems such that it can be customized to be a totally standalone system, so much so that the system only processes and outputs the required results, no other external inputs and no upgrade of the system are required. Will this system be totally secure? Discuss from all possible perspectives. Your aim is to derive a 100% safe system. You must state all possible assumptions, constraints, etc.

[bartonc]

Suppose you are provided with several computer systems on the market. The systems include hardware, system software, applications, operating systems, DBMS and many others. Is it possible to enhance one of the computer systems such that it can be customized to be a totally standalone system, so much so that the system only processes and outputs the required results, no other external inputs and no upgrade of the system are required. Will this system be totally secure? Discuss from all possible perspectives. Your aim is to derive a 100% safe system. You must state all possible assumptions, constraints, etc.

Looks like a homework question to me. Please read the Before you post your question sub section of the posting guidelines for site rules regarding homework assignment questions.

Thanks for joining <my appologies if this is not homework>.