针对非接触式智能卡的需求，提出一种基于有限计算能力的相互认证密钥交换协议。

Aiming at the demand of contactless smart card, this paper proposes a new mutual authentication key exchange protocol based on low power computing devices.

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无线信号的可截取本质以及大多数手持设备有限的内存和计算能力，使无线系统极易受到数据窃贼的攻击。

The interceptable nature of wireless signals and the limited memory and computing power of most handheld devices leaves wireless systems dangerously vulnerable to data theft.

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定制无线安全性非常困难，尤其是对于手持设备上有限的计算能力。

Customizing wireless security is extremely difficult, especially given the limited computing power on handheld devices.

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