In this way, you achieve a secure two-factor authentication wherein the Kerberos protocol plays a dual role.

在按照这种方式实现的双因素身份验证系统中，Kerberos协议扮演双重角色。

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So we put forward an algorithm of dual concurrent signature and design an electronic payment protocol without the trusted third party (TTP).

通过以上分析研究，本文提出了“双重的同时生效签名”算法，设计了无可信第三方的电子支付协议。

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Then the idiographic scheme are introduced in detail against different problems in transition period, including dual protocol stack, the tunnel technology, translating mechanism.

然后详细介绍了针对过渡期不同问题的具体策略和方案，包括双协议栈、隧道技术和协议翻译机制。

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