Quote by David Kahn Download Open image ““Ibn ad-Duraihim, according to Qalqashandi, gave seven systems of cipher:”” — David Kahn ★ ★ ★ ★ ★ 4.8 out of 5 (5 ratings) Copy quoteShare
“This list encompassed, for the first time in cryptography, both transposition and substitution systems, and, moreover, gave, in system 5, the first cipher ever… — David Kahn Copy Share Image
“The Arabic knowledge of cryptography was fully set forth in the section on cryptology in the Subh al-a ‘sha, an enormous, 14-volume encyclopedia” — David Kahn Copy Share Image
“Cryptology was born among the Arabs. They were the first to discover and write down the methods of cryptanalysis. The people that exploded out… — David Kahn Copy Share Image
“When ambitious men overcome a dynasty and seize power, they inevitably adopt most of the ways of their predecessors. —THE Muqaddimah OF IBN KHALDÛN” — Laurie R. King Copy Share Image
“European scholars had translated into Latin two important Arabic manuscripts, written by the ninth-century Persian mathematician Abū ‘Abdallāh Muammad ibn Mūsā al-Khwārizmī (ca. 780–ca.… — Keith J. Devlin Copy Share Image
“Cryptology served magical purposes frequently throughout the Middle Ages, and even in the Renaissance was still disguising important parts of alchemical formulas.” — David Kahn Copy Share Image
“In April 1977, Rivest, Shamir and Adleman spent Passover at the house of a student, and had consumed significant amounts of Manischewitz wine before… — Simon Singh Copy Share Image
“In ways that have not yet been properly understood, philosophy had a second beginning in Abbasid society by the end of the ninth century… — Dimitri Gutas Copy Share Image
“The important works of Al Ghazali were subsequently translated into hebrew, and played an important role in the jewish literature of the middle ages,… — Gershon Chertoff Copy Share Image
“It uses twenty-six substitution ciphers,” he told her. “One for each letter of the alphabet. But the problem is that it requires a keyword… — Christa Faust Copy Share Image
Cryptography has generated number theory, algebraic geometry over finite fields, algebra, combinatorics and computers. — Vladimir Arnold Copy Share Image
“What explanation does Ibn Arabi give for these phenomena ? A first explanation invokes the hierarchical planes of being, the Hadarat, or "Presences." There… — Henry Corbin Copy Share Image
“Hildegard von Bingen, an 11th-century nun who saw apocalyptic visions and was later canonized, had a cipher alphabet which she claimed came to her… — David Kahn Copy Share Image
“the most famous of all those who had an acquaintance with cryptology in the Middle Ages was an English customs official, amateur astronomer, and… — David Kahn Copy Share Image
“The task of the cryptanalysts consisted primarily of reconstructing the wiring and switches of the coding wheels—a task made more burdensome by the daily… — David Kahn Copy Share Image
“Analyzing the frequency and contacts of letters is the most universal, most basic of cryptanalytic procedures.” — David Kahn Copy Share Image
“General Joseph O. Mauborgne, who became Chief Signal Officer in October, 1937. Mauborgne had long been interested in cryptology. In 1914, as a young… — David Kahn Copy Share Image
“The only writer of the Middle Ages to describe cryptography instead of just using it was Roger Bacon, the English monk of startlingly modern… — David Kahn Copy Share Image
“Cryptology served magical purposes frequently throughout the Middle Ages, and even in the Renaissance was still disguising important parts of alchemical formulas.” — David Kahn Copy Share Image
“The technique was at least moderately well known, for Ibn Khaldūn wrote in The Muqaddimah: “Occasionally, skillful secretaries, though not the first to invent… — David Kahn Copy Share Image
“Cryptology was born among the Arabs. They were the first to discover and write down the methods of cryptanalysis. The people that exploded out… — David Kahn Copy Share Image
“Another steganographic system was still in use in the 20th century: Aeneas suggested pricking holes in a book or other document above or below… — David Kahn Copy Share Image
“Also of great importance in the discovery of linguistic phenomena that led to cryptanalysis was the development of lexicography.” — David Kahn Copy Share Image
“The world owes its first instructional text on communications security to the Greeks. It appeared as an entire chapter in one of the earliest… — David Kahn Copy Share Image
