COZMO-A New Lightweight Stream Cipher

TL;DR

This paper introduces COZMO, a new lightweight stream cipher that combines Trivium and A5by1 to enhance security and mitigate individual algorithm vulnerabilities.

Contribution

It proposes a novel merger of Trivium and A5by1 ciphers, creating a more secure key stream generator for lightweight cryptography.

Findings

Enhanced security against known attacks

Integrated cipher design improves efficiency

Potential for implementation in resource-constrained devices

Abstract

This paper deals with the merger of the two lightweight stream ciphers: A5by1 and Trivium. The idea is to make the key stream generation more secure and to remove the attacks of the individual algorithms. The bits generated by the Trivium cipher will act as the input of the A5by1 cipher. The registers used in the A5by1 cipher will be filled by the output bits of the Trivium cipher. The three registers will then be connected to generate an output which will be our required key stream.