Tinta invisible

Hace pocos días que ya avisaba de que la criptografía es un tema que me atrae bastante y que volvería a tratar el tema. En su momento comenté cómo se utilizó la escritura microscópica para enviar mensajes cifrados en los servicios secretos de Felipe II.

Volvemos sobre el tema y la época para ver cómo algunos de los mensajes secretos de Felipe II se escondieron utilizando tinta invisible. La técnica constaba en el uso de vitriolo romano (sulfato), pulverizarlo y mezclarlo con agua. Con este líquido se escribía sobre el papel el mensaje a enviar y una vez hecho esto, se escribía el texto visible usando una solución de carbón de sauce con agua. Es obvio que capturar a un correo o a un espía con un papel en blanco despertaría ciertas sospechas. En cambio, capturarlo con un papel con un escrito sin importancia no hacía recelar. Así, el texto de carbón efectuaba de “despiste” en caso de ser capturado el mensaje y el verdadero contenido, el importante, permanecía oculto.

Cuando el mensaje llegaba a su destino y se quería leer el mensaje secreto escrito con la solución de sulfato, se frotaba el papel con una sustancia llamada galla de Istria y así el texto oculto se hacía visible, mientras que lo escrito con la solución de carbón de sauce se oscurecía.

¿Alguien se anima a ponerlo a prueba y a contarnos el resultado? Eso sí, que no me pregunté qué demonios es el galla de Istria.

[Photo by Vaultboy]
Tinta invisible Tinta invisible Reviewed by Manuel Jesus Prieto Martín on 22:56:00 Rating: 5

15 comentarios:

  1. Anónimo06:54


  2. Gracias Condor por el mensaje. Aquí comentamos en su día la técnica de Lenin:


  3. Anónimo18:39

    necesito saber que es la galla de istria, no te habras equivocado al escribirlo. Puedes decir de donde sacaste la informacion. gracias.

  4. Hola:

    la fuente de esta curistoria es el libro Espías de Felipe II, de la editorial Esfera de los Libros. Los autores son Carlos Carnicer y Javier Marcos.


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