中文摘要：

在 2000，用智能卡的一个遥远的用户认证计划被建议，假面舞会攻击在这个计划上被证明成功。最近， Kumar 建议了检查位的想法与移开这些威胁很好的一个新计划克服上述攻击。在这篇论文，软弱仍然在 Kumar 的计划存在，这被指出，并且入侵者能通过有一些信息登录到遥远的系统。能克服这些攻击并且显得比 Kumar 的家更安全、有效的一个新计划被介绍。

英文摘要：

In 2000, a remote user authentication scheme using smart cards was proposed and the masquerade attacks were proved successful on this scheme. Recently, Kumar has suggested the idea of check digits to overcome the above attacks with a new scheme that removes these threats well. In this paper it is pointed out that the weakness still exists in Kumar＇s scheme, and the intruder can login to the remote system through having some information. A new scheme which can overcome these attacks and appears more secure and efficient than Kumar＇s is presented.