2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/99231This paper describes the security weakness of a recently proposed secure communication method based on parameter modulation of a chaotic system and adaptive observer-based synchronization scheme. We show that the security is compromised even without precise knowledge of the chaotic system used.8 pages, 3 figures, latex formatChaotic Dynamicstext