@article {IOPORT.05872664,
    author       = {Azizi, Abdelmalek and Azizi, Mostafa},
    title        = {Instances of Arabic cryptography in Morocco.},
    year         = {2011},
    journal      = {Cryptologia},
    volume       = {35},
    number       = {1},
    issn         = {0161-1194},
    pages        = {47-57},
    publisher    = {Rose-Hulman Institute of Technology, Terre Haute, IN; Taylor \& Francis, Philadelphia, PA},
    doi          = {10.1080/01611194.2010.509173},
    abstract     = {Summary: Cryptography and Steganography were used in the Maghreb and several ideas were introduced before 1600 (Arithmetical cryptography based on the factorization of integer and the calculus ``Hissab Al Jommal'', signature and the use of the ideas of cryptography to insure the security of transactions and inheritance deeds). In this paper, we give an overview of some instances of cryptography which we have found in the Maghreb (from the 11th century to the 17th century); however, there are undoubtedly many other cases to be found in the manuscripts that have not been studied yet.},
    identifier   = {05872664},
}