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Abstract
A multi-level hash chain structure is employed to improve a fair e-lottery scheme which ensures secure winning number generation and verification and to make verification more efficient. In addition, an implementation of a delaying function based on a secure hash function is presented.
Acknowledgements
This research was supported in part by the National Natural Science Foundation of China (Nos. 60573053 and 60672049) and the Specialized Research Fund for the Doctoral Program of Higher Education (No. 20050512002). The authors would like to thank the anonymous referees and the editors for their helpful suggestions.