ABSTRACT
The meaning of computer system security varies, depending
on the assets that the security mechanism is designed to
protect. The main objective of all security mechanisms is
that a system’s assets perform their tasks according to
authorized user expectations, while maintaining the confi-
dentiality, integrity, and availability of information (CIA).
The security aspects can be categorized, based on related
assets, into four types: hardware security, software security,
network security, and information system security.
