Multilevel access control and key management in scalable live streaming

• Author / Creator

  Li, Xingyu

• To prevent unauthorized access of multimedia content, effective access control and efficient key management schemes are of crucial importance for multimedia live streaming applications. To address the network heterogeneity, this thesis investigates scalable and multilevel access control, where a single bit stream can offer access to different levels of service. It uses the POSET hash-based structure to explore the data dependency between different layers in scalable coding, and proposes a secure and efficient key management scheme that uses public information and hash functions to reduce the rekey overhead. For those applications that require strict forward/backward security, sequential rekey is used to update keys. This thesis also addresses frequent membership update in live streaming, and considers applications that can tolerate a small amount of content leak. Through exploring their unique characteristics in membership dynamics, the proposed schemes reduce the rekey cost significantly.

• Subjects / Keywords

  • Acces control
  • Key management

• Graduation date

  Spring 2010

• Type of Item

  Thesis

• Degree

  Master of Science

• DOI

  https://doi.org/10.7939/R3TP4Q

• License

  This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.