… In this new scenario, each promotional offer is assigned an authenticated coupon code. …
Coupons are usually issued by manufacturers of consumer packaged goods or retailers, to be …

… To handle this issue, we propose a new e-coupon service by … The e-coupon services have
the following process to redeem … algorithm 5 (MD5), message authentication code (MAC), and …

… in the life cycle of an e-coupon: e-coupon issuance, redemption request, acceptance of
the … and Chen differentiate between the authentication and integrity of issued multi-coupons. …

… lose the redemption privacy when he redeems an e-coupon … servers to issue different types
of e-coupons were proposed [… -based authentication scheme TAA [7] and adapt it to e-coupon …

… do not usually deal with coupons redemption, delegating this … , such as issue and sell of
custom coupons, and they only … method and system for authentication of coupons via blockchain …

… electronic coupon (or e-coupon) system allows a service provider to issue a coupon to a user,
who can redeem the coupon … Different form k-time anonymous authentication schemes, we …

… authentication of some attributes of the customer, and that this … -redeem protection: In
our scheme we only consider the double-redeem issue if \(\mathcal {C}\) tries to use the e-coupon …

… We could divide e-coupons to two different groups by their … for customers to use since
redeemed coupons are stored on … Thus, many businesses start issuing their coupons through …

… this issue, a novel system is proposed to provide e-coupon … user cannot only redeem the
discount online but also forward it … to authenticate the e-coupons and to prevent the forging of e-…

… –Owner authentication: … redeem issue if C tries to use the e-coupon more than one time in
the same M , which is resolved by using a memory database to check the redeemed e-coupons…