"dvdm" - 1 õppematerjal

TheCodeBreakers

fourth, and so on. Modern cipher machines produce polyalphabetic ciphers that employ millions of cipher alphabets. Among the systems of substitution, code is distinguished from cipher. A code consists of thousands of words, phrases, letters, and syllables with the codewords or code-numbers (or, more generally, the codegroups) that replace these plaintext elements. plaintext codeword emplacing DVAP employ DVBO en- DVCN enable DVDM enabled DVEL  enabled to DVFK This means, of course, that DVDM replaces enable. If the plaintext and the code elements both run in alphabetical or numerical order, as above, the code is a one-part code, because a single book serves for both en- and decoding. If, however, the code equivalents stand in mixed order opposite their plaintext elements, like this Plaintext codenumber shield (for) 51648 shielded 07510 shielding 10983