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Ordered alphabet permutations. Homophones-Table Space This element contains 99 numbers arranged in 27 columns, in which each one contains 3 or 4 numbers. By means of the following equation system, we calculate the amount of columns containing 3 and 4 numbers respectively. x + y = 27 3x + 4y = 99
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According to historical reports, many telegrams that date from the Spanish Civil War (1936-1939) still remain undisclosed. It is believed that these telegrams were encrypted with a cryptosystem called the "Spanish Strip Cipher" (SSC). During this civil war, SSC was the most used cryptographic algorithm. This method corresponds to a homophonic subst...
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Context 1
... Position This element is only used to shift the random alphabet. Figure 3 shows a random alphabet that is generated from the keyword CRYPTOOL and then shifted with the initial position B in C. As one can see, both the random alphabet and the shifted random alphabet are permutations of the ordered alphabet. Therefore, the initial position element does not add any extra complexity to the brute-force attack against the SSC. ...
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