A Time-Bound Hierarchical Access Control and Key Management Scheme for Multicast Systems

• Main Authors: Wei-Chieh, Huang, 黃煒傑
• Other Authors: Rung-Lin, Shen
• Format: Others
• Language: en_US
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/44187277682669634039

碩士 === 國立臺北大學 === 電機工程研究所 === 100 === This thesis adopts elliptic curve multiplication operation, ID-based character in bilinear pairing, one-way hash function and time access control to construct a time-bound hierarchical access control and key management scheme for multicast systems. In this scheme, central authority (hereafter called CA) distributes a group key for every security class (SC) and a time-bound secret key for each member of security class. With its time-bounded secret key, each member in SC can obtain group key to decrypt the message and thereof utilize the group key to attain the successors’ group keys so as to decrypt their data. Considering many common ways of dynamic access control, namely, a new member joining in the security class, an existing member departing from security class, replacing time-bounded key, increasing security class, decreasing security class, replacing group key, adding relationship and deleting relationship among SCs, all of them are explicitly discussed in this thesis. In view of the security and performance analyses under many typical attacks, we thereby prove our proposed method can prevent malicious attacks effectively with less computation time and more reasonable complexity. In conclusion, the proposed scheme offers a secure hierarchical access control multicast system.