Research Article
KTR: an efficient key management scheme for air access control
@INPROCEEDINGS{10.1109/MOBIQUITOUS.2005.33, author={Q. Gu and P. Liu and W.-C. Lee and C.-H. Chu}, title={KTR: an efficient key management scheme for air access control}, proceedings={2nd International ICST Conference on Mobile and Ubiquitous Systems: Networking and Services}, publisher={IEEE}, proceedings_a={MOBIQUITOUS}, year={2005}, month={11}, keywords={}, doi={10.1109/MOBIQUITOUS.2005.33} }- Q. Gu
P. Liu
W.-C. Lee
C.-H. Chu
Year: 2005
KTR: an efficient key management scheme for air access control
MOBIQUITOUS
IEEE
DOI: 10.1109/MOBIQUITOUS.2005.33
Abstract
To provide secure access to data in wireless broadcast services, symmetric key-based encryption is used to ensure that only users who own the valid keys can decrypt the data. In this paper, we propose an efficient key management scheme (namely KTR) to handle key distribution with regarding to complex subscription options and user activities. KTR has the following advantages. First, it supports all subscription activities in wireless broadcast services. Second, in KTR, a user only needs to hold one set of keys for all subscribed programs, instead of separate sets of keys for each program. Third, KTR identifies the minimum set of keys that must be changed to ensure broadcast security and minimize the rekey cost. Our simulations show that KTR can save about 45% of communication overhead in the broadcast channel and about 50% of decryption cost for each user, compared with conventional approaches based on logical key hierarchy.