Publication Title : Stream Cipher Based Modified Espresso Algorithm for 5G Communication
Publicationed By : Chinmay Bepery
Publication Publication Date : 2019-05-18 00:00:00
Publication Online Link : http://computerjournals.stmjournals.in/index.php/JoCTA/issue/view/46
Publication Description :
To meet the requirement of 5G communication, Dubrova and Hell design Espresso, which is a stream cipher. Espresso uses 128-bit key, 96-bit initial vector (IV) and a 6-degree Boolean function as its output function. Jia-Min and Wen-Feng showed that algebraic attack is possible with time complexity being O(2 (66.86) ). In this paper, we present a methodology for the modification of Espresso with reformed Galois configuration of 256-bit Nonlinear Feedback Shift Registers (NLFSR) and 8-degree Boolean function as its output function. The advantages of Galois and Fibonacci configuration of NLFSRs, short propagation delay, and 8-degree Boolean function are combined in our algorithm which make it invulnerable to the classical algebraic attack and correlation attack.