Gromark Tutorial

The Gromark is similar to the Ragbaby in that a different shift is used at each position to encipher from plain to cipher text. The major differences are:

  1. The Gromark shift for each letter is calculated from a 5 digit primer from which a running key is formed by addition of successive pairs of digits and dropping tens. The Ragbaby shift is found from the position of the letter in the plain text (Both word and letter position).
  2. The Ragbaby has a single alphabet for both plain and cipher text. The Gromark has independent plain and cipher alphabets positioned over one another. However, the Gromark plain alphabet is always in standard form (i.e., abcde…xyz).

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