Distributed trustees and revocability: A framework for internet payment

Abstract

From von Solms and Naccache’s standpoint, constructing a practical and secure e-money system implies a proper regulation of its privacy level. Furthermore, when the system benefits from a widely connected communication network, tuning precisely this control for achieving efficiency without endangering security is a hard task. In order to solve this specific problem, we propose an e-cash scheme based on the usage of provably secure primitives, where trustee quora are in charge of privacy control. Moreover, Trustees remain off-line throughout the e-coin’s life to reduce the communication flow and improve the resulting scheme performance.