A Trusted Key Management Scheme for Digital Rights Management

ETRI Journal, Volume 27, Number 1,February 2005

Yeonjeong Jeong, Kisiong Yoon, and Jaecheol Ryou

OutlineIntroductionDRM systemTrusted Key Management Scheme

Encryption Key Key Distribution Scheme Key Delivery Scheme

Conclusion

Introduction Digital rights management adopts a license-based

mechanism which separates the keys from encrypted contents.

Digital rights management do not provide a way to protect a digital content form the license server.

DRM system

Encryption Key

The digital content is encrypted with a symmetric keys.

To protect against the illegal use of symmetric keys, the seeds of symmetric keys are encrypted with a public key.

Key Distribution Scheme

Key Delivery Scheme

Key delivery when packaging

Key Delivery Scheme

Key delivery when content service is provided

Conclusion The proposed scheme protects the key from not only the

purchaser but also other principals.