The S-boxes are the nonlinear part of DES that makes it difficult to break the algorithm and secure against linear and differential cryptanalysis. the s-boxes provide the "confusion" of data and key values, whilst the permutation P then spreads this as widely as possible, so each S-box output affects as many S-box inputs in the next round as possible, giving "diffusion".
There are 8 s-boxes also known as the substitution boxes, is a table that consist of four rows and 16 columns with 64 entries all together. They take in 6-bits and produce or output 4-bits. That is, the 48-bits into 8 S-boxes will be 6-bits each. However the 6-bits is represented in binary form of say, 010100. The two outer bits (the first and the last bit) represents the row (one of the four rows) and the inner four bits represent the columns (one of the 16 columns). The cell where the row and the column meets represents the value in decimal of the output. This is then converted to binary as the output. From the example 010100, the first and last digits 00 = the row which is the first row (00, 01, 10, 11) and the inner four digits 1010= the column. All 8 S-boxes will output 4-bits each in similar way and that is 32-bits output that is then permutated and further processed in the next round.
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protect for sensitive information.
La salle des ordinateurs.
for a good purpose
DES
Mon but est d'aider les gens en fournissant des informations, des réponses et des conseils en français.
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"un recensement de la population" is the operation of counting the population for statistics purpose (a census).
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Des racines et des ailes was created in 1998.
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double DES is less secure than triple DES triple DES is much slower than double DES double DES is within the range of brute force attack. but triple DES is not in the range of brute force attack.
"French apples" is a slang term that refers to the buttocks or rear end. This phrase is often used humorously or informally to describe someone's behind in a lighthearted manner. It is important to note that slang terms can vary in meaning and usage depending on the context and culture.
DES
Des chaussures brillant Des chaussures eclatant Des Chaussures rayonnant Des chassures scintillant
des sourires et des embrassades = smiles and kisses vous : you