ʿAlī ibn Muḥammad Ibn al-Durayhim ( ar, علي بن محمد ابن الدريهم; 1312–1359/62 CE) was an

Arab The Arabs (singular: Arab; singular ar, عَرَبِيٌّ, DIN 31635: , , plural ar, عَرَب, DIN 31635: , Arabic pronunciation: ), also known as the Arab people, are an ethnic group mainly inhabiting the Arab world in Western Asia, ...

cryptologist This is a list of cryptographers. Cryptography is the practice and study of techniques for secure communication in the presence of third parties called adversaries. Pre twentieth century * Al-Khalil ibn Ahmad al-Farahidi: wrote a (now lost) bo ...

who gave detailed descriptions of eight cipher systems that discussed

substitution ciphers In cryptography, a substitution cipher is a method of encrypting in which units of plaintext are replaced with the ciphertext, in a defined manner, with the help of a key; the "units" may be single letters (the most common), pairs of letters, tri ...

, leading to the earliest suggestion of a " tableau" of the kind that two centuries later became known as the " Vigenère table". His book entitled ''Clear Chapters Goals and Solving Ciphers'' (مقاصد الفصول المترجمة عن حل الترجمة) was recently discovered, but has yet to be published. It includes the use of the statistical techniques pioneered by

Al-Kindi Abū Yūsuf Yaʻqūb ibn ʼIsḥāq aṣ-Ṣabbāḥ al-Kindī (; ar, أبو يوسف يعقوب بن إسحاق الصبّاح الكندي; la, Alkindus; c. 801–873 AD) was an Arab Muslim philosopher, polymath, mathematician, physician ...

and Ibn 'Adlan.

References

{{DEFAULTSORT:Ibn al-Durayhim 1312 births 14th-century deaths Pre-19th-century cryptographers Mathematicians of the medieval Islamic world 14th-century Arabs