Research Overview

Sencun ZhuAsst. Prof. CSE/IST, PSUszhu@cse.psu.edu

Ongoing Work Sensor Network Security

Security and privacy support for data centric sensor networks Self-healing sensor networks (supported by ARO) Secure sensor data aggregation

Ad Hoc Network Security Network access control Traceback of compromised nodes

Overlay (P2P) Network Security Detection and identification of attackers Secure routing

Malicious Code Prevent virus and worm self-propagation Detecting buffer overflow attacks

Distributed Sensor Networks

Berkeley Mica2 Mote (2002):

•4 MHZ processor, 4 KB RAM

•19.2K bit rate

•OS: TinyOS

•cost: about $150 Berkeley Spec (2003):

•size: 2 mm * 2.5 mm

•cost: <$1 Eventual goal: smart dust

• size: 1 mm3

Types of sensors

• temperature

• humidity

• vehicular movement

• pressure

• acoustic

• light

• magnetic

•Mica2 •Mica2dot •Spec

Self-organize into multi-hop

wireless sensor networks

Sensor Network Applications Military applications

battlefield surveillance, battle damage assessment, biological and chemical attack detection

Environmental applications fire, flood, air pollution detection

Health applications patient monitoring, diagnostics, drug

administration Home applications

home automation, smart environment Other commercial applications

transportation, vehicle tracking, interactive toys

Security Threats Physical destruction of sensor nodes Radio jamming (physical layer attack) Higher layer attacks by both outsiders and

insiders (compromised nodes) eavesdropping on communications injecting false data

deceiving the base station resource consumption attacks

dropping, altering, or replaying packetsAttacks can target both the application and the

underlying networking protocols

Security and Privacy Solution for Data-centric Sensor Networks

The Framework and The Security Building Blocks

Attack-ResilientCell Head Election

Sensor Data Location Privacy

Secure Data Forwarding

Dependable Data Storage

Mobile SinkCompromise-Tolerance

Key Management

Query Optimization