Securing Home Networks

1
Securing Home Networks

• Tsutomu Matsumoto
• Professor, Yokohama National University

2
Taxonomy of Home Networks

• Network of Audio, Visual, Communication
  Devices and Personal Computers
• Network of Facility Control Devices including
  Sensors for Physical Security
• Network of Electrical Appliances

3
Architecture of Concern

• How to achieve quality of security almost
  equivalent as that achieved by Wired Network of
  Appliances

Wireless Network of Appliances
General Network Security Mechanisms such as
Firewalls, etc.
Air-Conditioner
Refrigerator
The Internet
Washing Machine
etc
4
Conventional Security Issues

• Confidentiality
• Integrity
• Availability
• Use of appropriate Cryptography and Network
  Security Technologies
• Make appropriate Standards to gain
  Interoperability among multi-vendor appliances

5
Typical Example
Appliance 2
Appliance 1
Appliance 3
F 1
F 3
F 2
C S 1
C S 3
C S 2
Wireless Medium
F Functional Part
C S Communication and Security Part
6
The Real Issue for Security

• The allowed computational complexity or the cost
  for mechanisms to enhance security may be highly
  limited
• Often the appliances DO NOT have their
  Identifiers in digital form
• Key Management
• including Key Establishment, Key
  Revocation, and Key Renewal
• needs Innovative Technologies
• How to achieve acceptable Quality of Security in
  such a tough environment