An E-Coupon Service Based on Blockchain

E-coupons are used often, as e-commerce becomes increasingly popular because of its mobility and ease of use. The majority of e-coupon providers manage e-coupon data on a single and centralized server, which makes them susceptible to security problems. To address this issue, a novel system is proposed to provide e-coupon service with enhanced security by employing blockchain technology and the HMAC Digital Signature Algorithm. Additionally, we improve the blockchain performance (in terms of speed and security) with a coupon recommendation contract and a malicious block avoiding contract. The experimental findings demonstrate that, when compared to an existing e-coupon service, stronger security is provided by our proposed service.