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The first page of al-Kindi's manuscript "On Deciphering Cryptographic Messages", containing the oldest known description of cryptanalysis by frequency analysis.
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الصفحة الأولى من مخطوطة الكندي المعنونة "رسالة في استخراج المعمى" تُعتبر وثيقة تاريخية في مجال التشفير. هذه المخطوطة، المعروفة بالعربية بهذا الاسم، تُعد واحدة من أقدم الأعمال المعروفة التي تفصّل عملية تحليل الشفرات
The first page of al-Kindi's manuscript "On Deciphering Cryptographic Messages", containing the oldest known description of cryptanalysis by frequency analysis. {{PD}}