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Najd

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Najd (ู†ุฌุฏ): A central region of Saudi Arabia, known for its rocky plateau and historical significance. It is the heartland of the House of Saud and played a crucial role in the unification of Saudi Arabia.

A glowing padlock outlined with mathematical equations, set against a dark background, with a keyhole emitting a bright light from within.
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Al-Kindi: The pioneer of cryptology

One of the greatest Arab scholars, al-Kindiย (ุงู„ู’ูƒูู†ู’ุฏููŠ), was one of the pioneers of cryptology. How did he manage to decrypt messages?