期刊名称:International Journal of Hybrid Information Technology
印刷版ISSN:1738-9968
出版年度:2016
卷号:9
期号:1
页码:431-442
DOI:10.14257/ijhit.2016.9.1.38
出版社:SERSC
摘要:In an electronic cash scheme, there are three participants, the bank, the spender and the merchant. First, a spender opens an account in a bank. Then, he withdraws electronic cash from his account and pays it to a merchant. After checking the electronic cash's validity, the merchant accepts it and deposits it to the bank. There are a number of requirements for an electronic cash scheme, such as, anonymity, unforgeability, unreusability, date attachability, divisibility, transferability and portability. In this paper, we show a recently proposed electronic cash scheme is suffering from some faults in anonymity, expiration date and merchant frauds. To improve the scheme, we propose a new untraceable off-line electronic cash scheme and give a security analysis for it.