cryptography       DIACAP       virus, malware scan       wireshark

security: degree of protection against danger, loss, criminals Security as a state or condition is resistance to harm. From an objective perspective, it is a structure's actual (conceptual, and never fully knowable) degree of resistance to harm. That condition derives from the structure's relationship (vulnerability, distance, insulation, protection) to threats in its environment. From a subjective perspective, security is the perception or belief that a valued structure has sufficient objective security. The subjective meaning of security as "freedom from anxiety or fear" resonates in the origins of the word. Latin "Se-Cura," means literally "without care" as in "carefree." With respect to classified matters, the condition that prevents unauthorized persons from having access to official information that is safeguarded in the interests of national security. Security concepts: Certain concepts recur throughout different fields of security: Assurance - assurance is the level of guarantee that a security system will behave as expected Countermeasure - a countermeasure is a way to stop a threat from triggering a risk event Defense in depth - never rely on one single security measure alone Exploit - a vulnerability that has been triggered by a threat - a risk of 1.0 (100%) Risk - a risk is a possible event which could cause a loss Threat - a threat is a method of triggering a risk event that is dangerous Vulnerability - a weakness in a target that can potentially be exploited by a threat