2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/91799This is a comment on PRL90(03)157901 by Antoni Wojcik (quant-ph/0211199)comment on PRL90(03)157901 by Antoni Wojcik (quant-ph/0211199)Quantum PhysicsComment on 'Eavesdropping on the ping-pong communication protocol'text