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2018•Unpublished venueRequires access

A New Stream Cipher Based on Nonlinear Dynamic System

O. Mannai, Rabei Becheikh, Rhouma Rhouma

Open publisher page 7 citations

Abstract

In this paper, we introduce a new synchronous stream cipher. The core of the cipher is the Ikeda system which can be seen as a Nonlinear Feedback Shift Register (NLFSR) of length 7 plus one memory. The cipher takes 256-bit key as input and generates in each iteration an output of 16-bits. A single key is allowed to generate up to 264output bits. A security analysis has been carried out and it has been showed that the output sequence produced by the scheme is pseudorandom in the sense that they cannot be distinguished from truly random sequence and resist to well-known stream cipher attacks.

About this research paper

What this paper is about

In this paper, we introduce a new synchronous stream cipher. The core of the cipher is the Ikeda system which can be seen as a Nonlinear Feedback Shift Register (NLFSR) of length 7 plus one memory. The cipher takes 256-bit key as input and generates in each iteration an output of 16-bits. A single key is allowed to generate up to 264output bits. A security analysis has been carried out and it has been showed that the output sequence produced by the scheme is pseudorandom in the sense that they cannot be distinguished from truly random sequence and resist to well-known stream cipher attacks.

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OpenAlex reports 7 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

In this paper, we introduce a new synchronous stream cipher. The core of the cipher is the Ikeda system which can be seen as a Nonlinear Feedback Shift Register (NLFSR) of length 7 plus one memory. The cipher takes 256-bit key as input and generates in each iteration an output of 16-bits. A single key is allowed to generate up to 264output bits. A security analysis has been carried out and it has been showed that the output sequence produced by the scheme is pseudorandom in the sense that they cannot be distinguished from truly random sequence and resist to well-known stream cipher attacks.

Key concepts: Stream cipher, Cipher, Computer science, Block cipher mode of operation, Affine cipher, Linear feedback shift register, Sequence (biology), Running key cipher

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