Analysis and Design of Non Linear Snow 2.0 for Improved Security
Mina Masood, Malik Sikandar Hayat Khiyal, Aihab Khan, Ghoosia Arshad · International Journal of Computer Theory and Engineering · 2011
In this paper, we propose a stream cipher; non-linear snow 2.0 by embedding non-linear function in dynamic feedback based modified snow 2.0 along with analysis of Guess and Determine (GD) Attack.The proposed non linear snow 2.0 uses two linear feedback shift registers (LFSR) in addition to the non-linear function to make the static nature of modified snow 2.0 dynamic.In non linear snow 2.0, the feed back change accepts values at dynamic tap positions rather than static so its structure is considered as dynamic and non linear.Experimental results show that proposed non-linear snow 2.0 has more resistance against guess and determine attack as compare to dynamic feedback based modified snow 2.0 without non-linear function and static feedback based modified snow 2.0.We conclude that for the encryption of plaintext non-linear snow 2.0 is more secure against guess and determine attack.