International Telecommunication Union ITU-T Workshop on Home Networking and Home Services Tokyo, Japan, June 2004 Securing Home Networks Tsutomu Matsumoto Professor, Yokohama National University

ITU-T 2 Taxonomy of Home Networks o Network of Audio, Visual, Communication Devices and Personal Computers o Network of Facility Control Devices including Sensors for Physical Security o Network of Electrical Appliances

ITU-T 3 Architecture of Concern How to achieve quality of security almost equivalent as that achieved by Wired Network of Appliances The Internet General Network Security Mechanisms such as Firewalls, etc. Air-Conditioner Refrigerator Washing Machine Wireless Network of Appliances etc

ITU-T 4 Conventional Security Issues o Confidentiality o Integrity o Availability Use of appropriate Cryptography and Network Security Technologies Make appropriate Standards to gain Interoperability among multi- vendor appliances

ITU-T 5 Typical Example F 1 C & S 1 Appliance 1 Appliance 3 Appliance 2 F 2 C & S 2 F 3 C & S 3 F : Functional Part C & S : Communication and Security Part Wireless Medium

ITU-T 6 The Real Issue for Security o The allowed computational complexity or the cost for mechanisms to enhance security may be highly limited o Often the appliances DO NOT have their Identifiers in digital form Key Management including Key Establishment, Key Revocation, and Key Renewal needs Innovative Technologies o How to achieve acceptable Quality of Security in such a tough environment