✘ - - - DECIPHER is a book compilation that tackles different, new and old codes/ciphers. In addition, this book begins with the definition of cryptography along with it's different terminology for begginers, and better understanding.
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‣ A Polybius Square is a table that allows someone to translate letters into numbers. To give a small level of encryption, this table can be randomized and shared with the recipient. In order to fit the 26 letters of the alphabet into the 25 spots created by the table, the letters I and J are usually combined.
Letters are represented by two numbers that are part of the set {1, 2, 3, 4, 5}, allowing the representation of 25 characters with only 5 numeric symbols. Each letter is then represented by its coordinates in the grid.
- See attach photo for better understanding.
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