裂口
发表于 2025-3-23 11:29:36
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立即
发表于 2025-3-23 16:16:11
Periodicity Examinationf keys in the period of the encryption. This is based on the following stationariness property of stochastic sources: If . is a plaintext (of length .) from a source ., then .(.), the plaintext . shifted cyclically by any number . of positions, is from the same source.
NADIR
发表于 2025-3-23 18:38:18
Die soziale Organisation von MännlichkeitAmong 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.
Decongestant
发表于 2025-3-24 01:19:32
Die Geschichte der MännlichkeitSimple (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.
骚动
发表于 2025-3-24 05:17:24
Die Wissenschaft von der MännlichkeitA linear (geometrically ‘affine’) substitution is a special poly graphic substitution. The injective encryption step of a polygraphic block encryption .with relatively large . and . is restricted in a particular way.
宠爱
发表于 2025-3-24 07:08:02
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Trypsin
发表于 2025-3-24 11:21:34
Wissen, Kommunikation und GesellschaftThe polyalphabetic encryption methods discussed so far use a key for encryption and a key for decryption. Crypto systems with self-reciprocal encryption steps use the same key for both, of course. In general, there are two possibilities:
FOVEA
发表于 2025-3-24 15:38:10
Franz Hamburger,Lydia Seus,Otto WolterLanguage contains an internal frame of regularities that are hard to extirpate. Particularly resistant are repeated patterns.
GUEER
发表于 2025-3-24 20:04:47
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ICLE
发表于 2025-3-25 00:01:37
Encryption Steps: Polygraphic Substitution and CodingSimple (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.