中文摘要：

无线网络的特征决定小密码学的要求。向象 MD5 那样的一个存在算法的巨大的费用，这篇论文基于拓宽 RC4 和减少的应用程序区域的 RC4 算法建议一个消息文摘计划资源或费用的要求。为了测试算法文摘，到测试标准被做了的 NIST randomicity 的十五种 randomicity 测试，和比较级的 randomicity，把算法的文摘 randomicity 与 MD5 作比较的分析也被执行了。算法的表演在方面被分析了单音择向性， randomicity，实物和复杂。统计测试和分析结果说明了那我们的计划具有计算，好统计性能，高跑速度和无足轻重的人的低费用。

英文摘要：

The characteristics of the wireless network determine the requirement of lightweight cryptography. Towards the huge cost of an existing algorithm such as MD5, this paper proposes a message digest scheme based on the RC4 algorithm which broadens the application area of the RC4 and decreases the requirement of resource or cost. To test the randomicity of the algorithm＇s di- gest, fifteen kinds of randomicity test to NIST randomicity test standard had been done, and the comparative analysis which compares the digest＇s randomicity of the algorithm with MD5 had been performed as well. The performance of the algorithm had been analyzed in aspects of mono-directivity, randomicity, practicality and complexness. Statistic tests and analysis results illustrated that our scheme was of low cost of computing, good statistic performance, high running speed and lightweight.