Template:Did you know nominations/Ibn 'Adlan

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Ibn 'Adlan

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Al-Salihiyya Mosque complex in 2015

Al-Salihiyya Mosque complex in 2015

• ... that the early cryptologist Ibn 'Adlan worked as a teacher of Arabic at Al-Salihiyya Mosque in Cairo (complex pictured in 2015)?
  Source: "Then he taught Arabic language for a while and had many students. He had his class in the as-Salih Mosque in Cairo... (Mrayati, Meer Alam & at-Tayyan 2004, p. 13)"
  • ALT1:... that the Arab cryptologist Ibn 'Adlan wrote about the cryptanalysis of ciphers with no space symbol, three centuries before it was first done in the West by G. B. Porta?
    Source: "This led to encipherment with no space symbol between word or with multyple symbols to represent the space symbol, methods that al-Kindi never faced. ibn 'Adlan shows how to break such ciphers ... This was three centuries before encipherment without spaces was treated in the west by the Italian cryptanalyst, G. B. Porta. (Massey 2008, p. 281)"

• Reviewed: Kasbah of Moulay Ismail
• Comment: image only goes with the main hook. ALT1 goes without image.

5x expanded by HaEr48 (talk). Self-nominated at 03:15, 12 August 2020 (UTC).