Security's the degree of protection against danger, loss, and criminals. Security has to be compared and contrasted with other related concepts: Safety,, reliability. The key difference between security and reliability's that security must take into account the actions of people attempting to cause destruction. Definitions The word security's derived from the Ancient Greek "Se-Cura" and literally translates to "without fear". 'Security''s therefore the state of being secure, or the actions empl… (More on Security)