A Mechanism to Protect Tokens from Dishonest Uses

摘要

Off-line anonymous credit card systems are ones that enable card holders to make purchases anonymously while being disconnected from a card company, i.e. without using information maintained the by card company or other shops. This paper proposes one of components that are required for developing off-line anonymous credit card systems. The proposed component enables card holders to protect their tokens from being used by other entities.