Steganography

A court stenographer is a person who records proceedings in a form of shorthand (a code in itself) that permits the stenographer to keep pace with those that are speaking in the courtroom. It is mentioned here to distinguish it from a look alike term that we will be talking about today —steganography.

Steganography is another fun type of coding device that was first used by the Greeks in 500 BC and also put to great use by the Germans in World Wars I & II. It is used to conceal the very existence of a disguised message being at all present.

There are many ways steganography was performed with the everyday newspaper, book or periodical. The cipher constructor would make use of any number of devices to allow the plaintext of a book, newspaper, or periodical to carry the hidden message.

Invisible ink marks, micro dots or micro holes visible only to an individual with special reading or magnifying devices were used to conceal the existence of a hidden message. The author of the hidden message would simply mark the letters or words of the original text that he needed to convey the special message.

Another method of steganography and one that you can easily adopt is a numbering system that will point out the appropriate text letters or words to convey the concealed message. To use this method with a friend you need only to be certain that you and the receiver are reading from the same text edition.

Let’s try this methodology out with cipher S1 below. It is using a numbering sequence that relates to the letters in the words of  paragraph one, line one in the Foreword of this Tutorial.

Steganography Ciphers

S1. 275 7212 32315

S2. True or false.

Steganography is used in today’s courts.

S3. True or false.

Steganography is a form of coding system.

S4. True or false.

Friends in Dallas, TX and Denver, CO can use a daily fixed signal to conceal a message which appears in their own daily local newspaper.