Instances of Arabic Cryptography in Morocco II

Abstract

In a previous article [5], the authors have presented some examples of cryptography in Morocco before the sixteenth century. In the present article, they continue to describe other methods of cryptography and steganography used by Moroccans between the seventeenth and the nineteenth centuries. In particular, there was intense use of the Hissab al Jomal calculation to encrypt numbers and use of a grid filled with verses of poetry in the form of a chessboard to write a given message.