2. Abstract
1. Introduction(sensor networks)
2. Obstacles of Sensor Security
3. Security Requirements
4. Attacks
5 Defensive Measures
6. Conclusions

3. Introduction
Uses tiny, in expensive sensor nodes
very low processing power and radio ranges
 permit very low energy consumption
perform limited and specific monitoring and sensing
functions.

4. Application
Agriculture and livestock
Ocean and wildlife monitoring,
 Manufacturing machinery performance monitoring,
 Building safety and earthquake monitoring,
 Many military applications.
 Monitoring of highway traffic, pollution, wildfires,
building security, water quality , People’s heart rates.

5. key features
scalability,
security,
 reliability,
 self-healing,
 robustness

6. Obstacles of Sensor Security
Very Limited Resources
Unreliable Communication
Unattended Operation

7. Very Limited Resources
Limited Memory and Storage Space
one common sensor type (TelosB) has an 16-bit, 8
MHz RISC CPU with only 10K RAM, 48K program
memory and 1024K flash storage
Power Limitation

8. Unreliable Communication
• Unreliable Transfer
- Conflicts
- Latency

9. Unattended Operation
• Exposure to Physical Attacks
- Managed Remotely
- No Central Management Point

10. Security Requirements
A sensor network is a special type of network. It
shares some commonalities with a typical computer
network, but also poses unique requirements.
Therefore, we can think of the requirements of a
wireless sensor network as encompassing both the
typical network requirements and the unique
requirements suited solely to wireless sensor
networks.

11. Attacks
Types of Denial of Service attacks
The Sybil attack
 Traffic Analysis Attacks
Node Replication Attacks
Attacks Against Privacy
 Physical Attacks