2008•Jisuanji gongchengRequires access
Improved RC4 Cipher Method and Its Performance Analysis
Fanping Zeng
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Abstract
When used in application, RC4 cipher technology has some problems, such as weak keys and related key attacks, invariance weakness,,byte bias and so on.This paper presents an improved RC4 cipher technology, which combines the ECC cipher and the RC4 stream cipher.Theemphasis is analyzing the efficiency, the management of keys, and the capability of the improved RC4 cipher.The result indicates that the efficiencyof the improved RC4 is just a litter lower than RC4 stream cipher while the security is much better than RC4.It has good repellency of the currentattacks which aim at RC4 stream cipher.What is more, the improved RC4 cipher has a good way to solve the problems about key management andkey update, which is very significant in application.