Virus and Worms

Physical Security

Table FF.11. Power Faults

Fault	Description
Blackout	Prolonged loss of power
Brownout	Power degradation that is low and less than normal
Sag	Momentary low voltage
Fault	Momentary loss of power
Spike	Momentary high voltage
Surge	Prolonged high voltage
Noise	Interference superimposed onto the power line
Transient	Noise disturbances of a short duration
Inrush	Initial surge of power at startup

• A turnstile is a form of gate that prevents more than one person at a time from gaining access to a controlled area. Turnstiles usually only turn in one direction to restrict movement to only that direction.
• Piggybacking is the primary way that someone would try to bypass a mantrap. To prevent and detect this, guards and CCTV can be used.
• Fire prevention should be performed to make sure that employees are trained and know how to prevent fires from occurring and how to respond when they do.
• Fire detection systems are used to signal employees that there might be a problem.
• Fire suppression addresses the means of extinguishing a fire. Not all fires are composed of the same combustible components.
• Passwords and pin numbers These authentication systems are based on something you know: as an example, a name and an alphanumeric password or pin number.
• Tokens, smart cards, and magnetic strip cards These authentication systems are based on something you have. As an example, your employer might have issued you a smart card with your ID embedded in it that is read by readers throughout the organization and will allow you to access controlled areas.
• Biometrics These authentication systems are based on what you are, such as a fingerprint, retina scan, or voice print. As an example, the company you work for might have placed a fingerprint reader outside the server room to keep unauthorized individuals out.
• The discretionary access control model is one most users are familiar with. Access control is left to the owner's discretion.
• Mandatory access control features a static model and is based on a predetermined list of access privileges.
• Defense in depth is about building multiple layers of security that will protect the organization better than one single layer.

Linux Hacking