Mobile Agent Route Protection through Hash-Based Mechanisms
INDOCRYPT '01 Proceedings of the Second International Conference on Cryptology in India: Progress in Cryptology
An improved and efficient micro-payment scheme
Journal of Theoretical and Applied Electronic Commerce Research
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Rivest and Shamir[2] proposed a system for generating micropayment 'coins' using an engine that finds collisions in the output of a hash function. Such coins, they argued, would be quick to verify. Furthermore, by virtue of the birthday paradox, the cost of generation a large number of coins could be kept to an acceptable level through economies of scale while the cost of generating a small number of forgeries would be high compared to the return.In this paper we examine the practicalities of building a MicroMint and we question some of the security statements made in the original paper.