"10986" - 1 õppematerjal

TheCodeBreakers

elements, like this Plaintext codenumber shield (for) 51648 shielded 07510 shielding 10983 shift(s) 43144 ship 35732 ships 10762 the code is a two-part code, because a second section, in which the code elements are in regular order, is required for decoding: codenumber plaintext 10980 was not 10981 spontaneous (ly) 10983 shielding 10986 April 13 10988 withdrawn from 10990 acknowledge In a sense, a code comprises a gigantic cipher alphabet, in which the basic plaintext unit is the word or the phrase; syllables and letters are supplied mainly to spell out words not present in the code. In ciphers, on the other hand, the basic unit is the letter, sometimes the letter-pair (digraph or bigram), very rarely larger groups of letters (polygrams)