A novel micro-payment scheme for M-commerce based on self-renewal hash chains

JI et al improved R. Revest´s PayWord scheme based on hash chains and proposed a micro-payment scheme which had better security and fairness, but the scheme did not solve the problems of user´s malicious overdraft and its executive timeliness. Furthermore its efficiency and security was restricted by the inherent shortcoming of conventional hash chains (CHC). The paper proposes a micro-payment scheme based on self-renewal hash chains scheme (SRHC). The analysis results show that the proposed scheme not only solves the problems existed in JI´s scheme, but also has better features on security, efficiency and fairness. The novel scheme fits scenario of repeated micro-payment such as information commodity between a mobile user and a fixed service provider.