Module Ten

Smart card may be coupled with a token wireless

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Smart Card may be coupled with a token Wireless Proximity Readers n Does not require physically inserting the card n Card reader senses the card n Two Types: n User Activated – transmits keystroke sequence to a wireless keypad reader n System Sensing – senses card n Passive Devices – card contains no battery, senses electromagnetic field of reader and transmits frequency using power of reader n Field Powered Devices – contain active electronics on the card n Transponders - Both card and reader contain active electronics, transmitter, battery n Reader sends signal, card sends signal back
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Card Types Type of Card Description Photo ID Facial photograph Optical coded Laser burned lattice of digital dots Electric circuit Printed chip on the card Magnetic stripe Stripe of magnetic material Magnetic strip Rows of copper strings Passive electronic Electrically-tuned circuitry read by RF Active electronic Badge transmits encoded electronics Biometric Devices n Are physical access devices Intrusion Detection Alarms n Identifying attempts to access a building n Two most common types: n Photoelectric sensors n dry contact switches Photoelectric sensors n Receive beam of light from tight emitter n Can be visible light, white light or infrared n Alarm sounds if beam is broken n Can be avoided if seen n Invisible Infrared is often used n Employing substitute light source can fool sensor Dry Contact Switches n Most common n Metallic foil tape on windows and doors n Easy and cheap Motion Detectors Wave Pattern n Generate frequency wave pattern n Sound alarm if disturbed n Can be low frequency, ultrasonic, or microwave Capacitance n Monitor electrical field surrounding object n Spot protections within a few inches of the object n Not for entire room n Penetration of field changes capacitance Audio Detectors n Passive, no generation of fields n Simply monitor room for abnormal noise n High number of false positives Alarm Systems Local Alarm Systems n Rings an audible signal
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n Must be protected from tampering n Audible for at least 400 ft n Requires guards to respond locally Central Alarm Systems n Private security firms n Central station n Offer CCTV monitoring n Reporting n Commonly 10 minutes or less travel time Proprietary Alarm Systems n Similar to central n The company owns monitoring n Like local but with features of the central system Auxiliary Station Systems n Any of the previous three may have auxiliary alarms ring at the fire or police station. n Need permission from local authorities Other Requirements: Line Supervision n Line is monitored to prevent tampering to subvert the alarm system. Power Supplies n Alarms should have backup power for a minimum of 24 hours Computer Inventory Control n Control of equipment from theft n PC Control and laptop control PC Control n Cable locks – anchor the PC to the desk n Port Controls – secure data ports (i.e. floppy drive) or serial or data ports and prevent their use n Switch Controls – cover for on/off switch which prevent user from switching off file servers
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Smart Card may be coupled with a token Wireless Proximity...

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