Title	A Secure E-coupon System for Mobile Users
Author	Chin-Chen Chang, Chia-Chi Wu, Iuon-Chang Lin
Citation	Vol. 6  No. 1  pp. 273~278
Keywords	e-commerce, e-coupon, mobile commerce

Title	Digital Right Schemes for Limited Issue and Flexible Division
Author	Chia-Chen Lin, Chia-Chi Wu, Chin-Chen Chang
Citation	Vol. 8  No. 2  pp. 33-42
Keywords	Digital right, limited issue, flexible division, PKI