Noticias: Escuchar los teclados para descubrir contraseñas
Enviado el Viernes, 08 abril a las 00:00:00 por computerfacil
Unos investigadores de IBM advierten sobre un nuevo sistema de robar información... literalmente consiste en escuchar a los teclados. Dmitri Asonov y Rakesh Agrawal son dos investigadores de IBM que se han fijado en una...
característica de los teclados utilizados por ordenadores, cajeros automáticos, cerraduras electrónicas y dispositivos similares. La pulsación de las teclas generalmente emite un sonido, fruto de la pulsación que se realiza sobre la tecla.
Este sonido se produce por el movimiento de la tecla y el movimiento sobre la membrana que realiza la conversión del movimiento en un impulso eléctrico. El sonido generado de cada tecla puede llegar a ser individualizado: el teclado no emite el
mismo sonido cuando se pulsa la 'a', la barra espaciadora o la 'm'. por citar únicamente tres teclas.
Lo que ha descubierto estos investigadores es que, utilizando material al alcance de cualquier persona (micrófonos y el software adecuado) se puede llegar a identificar las teclas pulsadas a partir de la grabación del sonido. Según indican,
registrando el sonido de cada tecla unas 30 veces se dispone de la suficiente información para realizar la operación inversa con un elevado porcentaje de éxito: identificar la tecla pulsada.
Evidentemente las implicaciones de seguridad son bien visibles:
si estamos dentro de un cajero y alguien graba el sonido que se genera mientras se escribe el PIN, se podrá identificar el mismo.
Igual ocurre cuando se escribe la contraseña de acceso a un servicio en el teclado de un PC.
Esta investigación ha sido presentada durante el Symposium sobre Seguridad y Privacidad de la IEEE, celebrado en Oakland (California, USA) entre los días 9 a 12 del presente mes de mayo.
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especially in literature, and which Shakespeare possessed so enormously
-- I mean negative capability, that is, when a man is capable of being
in uncertainties, mysteries, doubts, without any irritable reaching
after fact and reason.
-- John Keats
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And I no more believe Topper was really blind than I believe he had eyes
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Scrooge's nephew; and that the Ghost of Christmas Present knew it. The
way he went after that plump sister in the lace tucker, was an outrage
on the credulity of human nature.
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Q: What's the contour integral around Western Europe?
A: Zero, because all the Poles are in Eastern Europe!
Addendum: Actually, there ARE some Poles in Western Europe, but they
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Q: An English mathematician (I forgot who) was asked by his
very religious colleague: Do you believe in one God?
A: Yes, up to isomorphism!
Q: What is a compact city?
A: It's a city that can be guarded by finitely many near-sighted
policemen!
-- Peter Lax
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