2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/144515In ISNN'04, a novel symmetric cipher was proposed, by combining a chaotic signal and a clipped neural network (CNN) for encryption. The present paper analyzes the security of this chaotic cipher against chosen-plaintext attacks, and points out that this cipher can be broken by a chosen-plaintext attack. Experimental analyses are given to support the feasibility of the proposed attack.LNCS style, 7 pages, 1 figure (6 sub-figures)Cryptography and SecurityNeural and Evolutionary ComputingChaotic Dynamicstext