Temporal key integrity protocol （TKIP） is a sub-protocol of IEEE 802.11i. TKIP remedies some security flaws in wired equivalent privacy （WEP） protocol. TKIP adds four new algorithms to WEP： a message integrity co...Temporal key integrity protocol （TKIP） is a sub-protocol of IEEE 802.11i. TKIP remedies some security flaws in wired equivalent privacy （WEP） protocol. TKIP adds four new algorithms to WEP： a message integrity code （MIC） called Michael, an initialization vector （IV） sequencing discipline, a key mixing function and a reeying mechanism. The key mixing function, also called temporal key hash, de-correlates the IVs from weak keys. Some cryptographic properties of the substitution box （S-box） used in the key mixing function are investigated in this paper, such as regularity, avalanche effect, differ uniform and linear structure. Moen et al pointed out that there existed a temporal key recovery attack in TKIP key mixing function. In this paper a method is proposed to defend against the attack, and the resulting effect on performance is discussed.展开更多
设计通过分析TKIP加密协议中算法漏洞,采用密码字典来破解无线网。设计批量生成字母、数字、字符等密码文本文件编成密码字典完成对数据报文的破解。设计是在Microsoft Visual Studio 2013的开发环境下,使用C#语言完成软件代码的编写、...设计通过分析TKIP加密协议中算法漏洞,采用密码字典来破解无线网。设计批量生成字母、数字、字符等密码文本文件编成密码字典完成对数据报文的破解。设计是在Microsoft Visual Studio 2013的开发环境下,使用C#语言完成软件代码的编写、设计密码生成器、生成破解过程中所需的密码文件。经过测试,可完成对加密报文的解密工作,大大提高无线数据报文破解的成功率。展开更多
基金the National Laboratory for Modern Communications(No.51436050304JW0317)the National Natural Science Foundation of China(No.60573030)
文摘Temporal key integrity protocol （TKIP） is a sub-protocol of IEEE 802.11i. TKIP remedies some security flaws in wired equivalent privacy （WEP） protocol. TKIP adds four new algorithms to WEP： a message integrity code （MIC） called Michael, an initialization vector （IV） sequencing discipline, a key mixing function and a reeying mechanism. The key mixing function, also called temporal key hash, de-correlates the IVs from weak keys. Some cryptographic properties of the substitution box （S-box） used in the key mixing function are investigated in this paper, such as regularity, avalanche effect, differ uniform and linear structure. Moen et al pointed out that there existed a temporal key recovery attack in TKIP key mixing function. In this paper a method is proposed to defend against the attack, and the resulting effect on performance is discussed.
文摘设计通过分析TKIP加密协议中算法漏洞,采用密码字典来破解无线网。设计批量生成字母、数字、字符等密码文本文件编成密码字典完成对数据报文的破解。设计是在Microsoft Visual Studio 2013的开发环境下,使用C#语言完成软件代码的编写、设计密码生成器、生成破解过程中所需的密码文件。经过测试,可完成对加密报文的解密工作,大大提高无线数据报文破解的成功率。
