Simple and Secure Coin (SAS-Coin)-A Practical Micropayment System

摘要

In this paper we propose SAS-Coin, a very prac- tical micro payment scheme based on a hash chain and a simple one time password authentication protocol called SAS. While it has many desirable features of a coin (anonymity etc.), it has no public key operations at any stage and has very little overheads. Moreover authentication is also available and a session key could be generated for encrypted information supply without any addi- tional cost at all.