![]() In today's world, steganography has been digitized, making it particularly dangerous. With microfilm, texts are reduced to the size of a typewriter dot - illegible to the human eye and extremely easy to hide. Or think of older crime films, in which spies smuggled secret information on microfilms from the headquarters of the enemy. Leonardo da Vinci, who left messages in many of his works, also knew this. Pictures are also excellent for hiding secret messages. To disguise the secret messages, they were carved into the wood underneath, then wax was poured over them and this was then covered with an innocuous message. The wax tablets usually contained messages that were carved into the wax. This was followed by another shaving of the head - and the message became visible.Īnother example from the distant past is the use of wax tablets, a common medium for writing in ancient times. After the hair had grown back completely, the slave was sent to the recipient of the message. First, the slave's head was shaved and then a message was tattooed on the scalp. In order to transport information securely from one place to another, the "means of transport" at that time was slaves. ![]() A rather elaborate procedure is known from ancient Rome. The use of steganography can be traced back to ancient times. ![]() In the process, information is hidden in such a way that third parties do not suspect anything when looking at the carrier medium and cannot perceive the mere existence of the secret information. Steganography describes the process of concealing messages in a carrier medium. Steganography is a term borrowed from the Greek, composed of the two words στεγανός for "hidden" and γραφία for "writing". What is steganography and how does it work today?
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