Exchange of the Text

One of the easiest tools for disinformation is to exchange the words written below a photograph. The entire meaning of the picture can be varied like this:

- The visit of a school-group at a former international camp can change into a camp, where children are imprisoned (which happened in the Russian city of Petroskoy in 1944).

- Victims of war can change nationality. The picture of the brutal German soldier in World War II that was shown in many newspapers to demonstrate the so-called typical face of a murderer, turned out to be French and a victim in other newspapers.

- In 1976 a picture of children in a day-nursery in the GDR is taken: The children, coming out of the shower, were dressed up in terry cloth suits with stripes. The same year the photograph with the happily laughing boys and girls wins the contest "a beautiful picture". Two years later a small part of the photograph can be seen in a Christian magazine in West-Germany, supposedly showing children from a concentration camp in the USSR. The smiling faces now seem to scream. (source: Stiftung Haus der Geschichte der Bundesrepublik Deutschland (ed.): Bilder, die lügen. Begleitbuch zur Ausstellung im Haus der Geschichte der Bundesrepublik Deutschland. Bonn 1998, p. 79)

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Optical communication system by Aeneas Tacitus, 4th century B.C.

Aeneas Tacitus, a Greek military scientist and cryptographer, invented an optical communication system that combines water and beacon telegraphy. Torches indicated the beginnings and the ends of message transmissions while water jars were used to transmit the messages. These jars had a plugged standard-size hole drilled on the bottom side and were filled with water. As those who sent and those who received the message unplugged the jars simultaneously, the water drained out. Because the transmitted messages corresponded to water levels, the sender indicated by torch signal that the appropriate water level has been reached. It is a disadvantage that the possible messages are restricted to a given code, but as this system was mainly used for military purposes, this was offset by the advantage that it was almost impossible for outsiders to understand these messages unless they possessed the codebook.

With communication separated from transportation, the distant became near.

Tacitus' telegraph system was very fast and not excelled until the end of the 18th century.

For further information see Joanne Chang & Anna Soellner, Decoding Device, http://www.smith.edu/hsc/museum/ancient_inventions/decoder2.html

http://www.smith.edu/hsc/museum/ancient_inven...
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