珊瑚
发表于 2025-3-23 13:15:04
https://doi.org/10.1007/978-3-658-30696-0s its elements. This is for . > 2 a severe restriction. Requiring moreover that in every row and in every column, one occurs just once and thus the elements are zero otherwise, leads to permutation matrices effectuating a mere permutation of the vector space basis.
流逝
发表于 2025-3-23 17:45:19
The History of Jihadism in Canada466 or 1467 for his friend Leonardo Dato, the papal secretary. The Latin original is reproduced in Aloys Meister, ., Paderborn, Schöningh, 1906, pp. 125–141 (Italian translation ., manuscript, about 1470).
AGGER
发表于 2025-3-23 18:42:32
https://doi.org/10.1007/978-3-658-37486-0sume pessimistically that the enemy knows what method has been chosen — there are not too many of them, and most cryptographers are familiar with only a few. The ‘basic law of cryptology’, which Kerckhoffs. had formulated as . was expressed more succinctly by Shannon in 1949: “the enemy knows the sy
phlegm
发表于 2025-3-24 00:33:53
Khadija Katja Wöhler-Khalfallahryption. As a measure of security against unauthorized decryption, it gives an upper bound on the work required for an exhaustive search under the assumption that the class of methods is known (Shannon’s maxim: “The enemy knows the system being used.”)
Tidious
发表于 2025-3-24 04:47:22
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prick-test
发表于 2025-3-24 08:53:20
Franz Waldenberger,Alexander von Mylius M.A. now uses the internal organs. It aims at the stochastic laws of the language, particularly at character and multigram frequencies. This aspect of cryptography was already known to Leone Battista Alberti (., 1470).
不如屎壳郎
发表于 2025-3-24 14:11:20
Frank Himpel,Andrea Berzlanovichhis is also true for plaintext: there is a reliable method to test a sufficiently long text for its membership of a known language, without ‘taking notice’ of it — without regarding its grammar and semantics — and there is a related test to decide whether two texts belong to the same language, witho
ARC
发表于 2025-3-24 17:12:06
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demote
发表于 2025-3-24 22:11:47
https://doi.org/10.1007/978-3-642-93577-0Among the encryption steps we find prominently two large classes: substitution and transposition. They are both special cases of the most general encryption step .. ⇢... We shall start by looking at several kinds of substitution and turn our attention to transposition in Chapter 6.
Stable-Angina
发表于 2025-3-25 03:04:47
Der große Ball — eine runde Sache?Simple (monographic) substitution requires a complete decomposition of the plaintext in single characters. A polygraphic substitution allows polygraphic encryption steps, i.e., encryption steps of the form .. ⇢ .. with . > 1.