Dynamic feedback based modified SNOW 2.0
Emerging Technologies(2010)
摘要
SNOW family is static in nature and it is based on static feedback. It is used to encrypt data from user input form to a binary form for secure communication. All the existing versions of snow family are affected by guess and determine attacks. Modified version of SNOW 2.0 shows more resistance against guess and determine attacks, but there are still some limitations. This paper has proposed a new version of stream cipher modified SNOW 2.0 based on dynamic feedback. The proposed technique uses dynamic feedback based shift register to overcome the limitations of previous techniques and it increases security of communication channel. Dynamic feedback is determined by using dynamic number generator function. It generates dynamic tap position to increase the security of modified version. Dynamic feedback makes difficult for attacker to guess the exact values. Finally, the analysis and experimental results show that the proposed technique has more resistance against Guess and Determine (GD) attacks as compared to static feedback based modified SNOW 2.0.
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关键词
computer crime,cryptography,random number generation,shift registers,telecommunication security,data encryption,dynamic feedback,dynamic number generator function,dynamic tap position,guess and determine attack,secure communication,shift register,static feedback,stream cipher modified snow 2.0,dynamic number generator,linear feed back shift register (lfsr),modified snow 2.0,communication channels,stream cipher,generating function
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