An ordered minimal perfect hashing scheme based upon Euler's theorem
Information Sciences: an International Journal
On the design of a machine-independent perfect hashing scheme
The Computer Journal - Special issue on data structures
The study of an ordered minimal perfect hashing scheme
Communications of the ACM
A method for obtaining digital signatures and public-key cryptosystems
Communications of the ACM
Untraceable off-line electronic cash flow in e-commerce
ACSC '01 Proceedings of the 24th Australasian conference on Computer science
Single-Term Divisible Electronic Cash Based on Bit Commitment
ISCC '00 Proceedings of the Fifth IEEE Symposium on Computers and Communications (ISCC 2000)
Symbolic Gray Code as a Perfect Multiattribute Hashing Scheme for Partial Match Queries
IEEE Transactions on Software Engineering
Design, implementation, and deployment of the iKP secure electronic payment system
IEEE Journal on Selected Areas in Communications
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Recently, e-commerce becomes widespread; hence electronic department stores come into being. As a result, Chan and Chang proposed a scheme for digital gift certificates in 2002. Because it is hard to estimate the number of the clients of the electronic department stores, reducing the computation complexity of the electronic department stores becomes an important issue. Due to the need, we propose two schemes for digital gift certificates. Our proposed schemes are very practical since the computation load is light. So the schemes can be applied to the terminals with low computation power.