Design of Key-Sharing System Based on a Unique Device

1
Design of Key-Sharing System Based on a Unique
Device

• ? Kenji Imamoto (Kyushu Univ.)
• Hiromi Fukaya (Pastel)
• Kouichi Sakurai (Kyushu Univ.)

2
Background

• In these days, a lot of services using the
  internet (e.g. e-commerce, banking, e-government)
  has been developed

• There exists several ways for securing
  communication
• - Password, Biometrics, IC card,

Our research is

• How to Realize Device-Authentication
• Confirm whether it is a correct equipment by
  using a peculiar value of the equipment

3
IST scheme

• ID-based encryption scheme based on Symmetric-key
  technique with a Trusted device
• Introduce unique device
• Each device has an unforgeable area that stores
  unique ID (ie. cloning of the device is assumed
  to be impossible)

Name
Ciphertext
Plaintext
4
Conclusion

• Design a key-sharing system for device
  authentication based on unique-device
• Cloning of a device is prohibited due to TR-HW
  with unique ID
• Future Work
• Design an algorithm for generating secret key and
  unique ID
• How to reduce the damage of whole system when a
  device is broken
• Investigate the limitation of system using
  unique-device
• Concrete implementation and application