Monitoring Systems

1
Chapter 10

• Monitoring Systems

2
Monitoring Systems

• Most examples here monitor physical systems
• Alarms
• PrePayment Meters
• Taximeters, Tachographs, Truck Speed Limiters

3
Alarms

• Threat Model
• Who is your attacker
• See page 209 4 examples
• Deter Detect Alarm Delay Respond
• Sensors Page 211
• Eliminating false positives
• Layers of defenses -- barriers

4
Attacks

• Sensors
• Feature interactions
• Attacks on Communications
• Physical security

5
Prepayment meters

• Purchase one place use it in another location
• Protect against forgery and duplication
• Petty fraud acceptable risk
• Systematic fraud is not
• Great study of prepayment meter pages 215-222
• It is cool to read and think about these systems

6
Taximeters, Tachographs, Speed limiters.

• Odometer in cars
• Taximeters
• Black Boxes
• What goes wrong with Tachographs?
• 70 procedural
• 20 tamper with supply to tachograph
• 6 tamper with instrument
• hightech

7
Tachosmart

• European Union
• Designing smart card based system
• Does little to eliminate procedural fraud
• Issues of enforcement between countries
• Use of GPS units (privacy)
• Turnover time to equip trucks
• Digital open to additional fraud
• Resurrected Duckling

8
Discussion articles

• Prepayment meters
• Other uses of Resurrected Duckling