A highly efficient and secure electronic cash system based on secure sharing in cloud environment

Abstract

Online electronic transactions have become more and more popular in recent years. Electronic cash (e‐cash) has acted an important role, but e‐cash is digital data that can be copied easily, resulting in double spending. To ensure the security and fairness of transactions, researchers designed secure e‐cash payment systems. In 1982, Chaum proposed the first payment scheme using an RSA‐based, blind signature to achieve anonymity. Since then, many studies have been conducted, but most related schemes still have high costs associated with the computations. In this paper, we propose a new, secure, e‐cash payment system using elliptic curve cryptosystem (ECC) and secret sharing combined with cloud computing to provide lower cost than previous systems. Our proposed scheme also can meet the requirements of a well‐designed, secure, e‐cash payment system. Copyright © 2016 John Wiley & Sons, Ltd.

An efficient lattice‐based threshold signature scheme using multi‐stage secret sharing

“…Secret sharing schemes are cryptographic primitives to protect a secret by sharing it to some values and assign them to different users. These schemes are used in many different applications such as cloud computing [1], key management in sensor networks [2], electronic voting [3] and electronic cash [4]. Secret sharing provides solutions for data privacy, availability, integrity and verifiability, which makes it suitable for these applications.…”

A lattice-based changeable threshold multi-secret sharing scheme and its application to threshold cryptography

“…Secret sharing is a cryptographic primitive with many applications such as key management in sensor networks [1], electronic cash [2], electronic voting [3], and cloud computing [4]. A secret sharing scheme splits a secret among a set of parties, called participants, in such a way that some authorized subsets of the participants can reconstruct the secret using their assigned values, called shares, by a trusted third party named dealer.…”