Systems engineers are able to design and create trustworthy secure systems. If systems security engineering is properly integrated into systems engineering, it extends the notion of trustworthiness to be capable of creating secure systems. Trustworthy systems are less vulnerable to threats. Less vulnerable systems decreases the chances of attacks being successful, though no system can be 100 % secure and no attacks can be mitigated 100%. Secured systems contributes to CIA (confidentiality, integrity, and availability). Activities of security systems engineering includes well-established systems engineering and security principles, concepts, and techniques that leverage, adapt, and supplement the relevant principles and practices of systems engineering. Activities are performed consistently to achieve the outcomes within every stage of the system life cycle, including concept, development, production, utilization, support, and retirement.