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Efficient time-bound hierarchical key assignment scheme

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1 Author(s)
Hung-Yu Chen ; Dept. of Inf. Manage., Chaoyang Univ. of Technol., Taichung, Taiwan

The access privileges in distributed systems can be effectively organized as a hierarchical tree that consists of distinct classes. A hierarchical time-bound key assignment scheme is to assign distinct cryptographic keys to distinct classes according to their privileges so that users from a higher class can use their class key to derive the keys of lower classes, and the keys are different for each time period; therefore, key derivation is constrained by both the class relation and the time period. We propose, based on a tamper-resistant device, a new time-bound key assignment scheme that greatly improves the computational performance and reduces the implementation cost.

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Knowledge and Data Engineering, IEEE Transactions on  (Volume:16 ,  Issue: 10 )