1510 10917 2/10/2012 Critical 14 1511 10919 3/27/2010 High 42 1512 10944 11/12/2011 High 9 1513 10945 1/3/2012 Medium 14 1514 10948 8/13/2012 Medium 50 1515 10949 3/30/2009 Medium 46 1516 10951 11/6/2012 Not Specified 14 1517 10978 4/1/2009 Critical 9 1518 10979 10/4/2011 Medium 15 1519 10979 10/4/2011 Medium 7 1520 10981 5/14/2010 High 41 1521 10981 5/14/2010 High 33 1522 10982 12/10/2012 Not Specified 29 1523 10982 12/10/2012 Not Specified 30 1524 10982 12/10/2012 Not Specified 14 1525 11008 2/24/2009 Critical 17 1526 11011 5/13/2012 High 33 1527 11011 5/13/2012 High 36 1528 11011 5/13/2012 High 36 1529 11013 4/17/2009 High 2 1530 11014 9/7/2010 High 13
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 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required for decoding: codenumber plaintext 10980 was not 10981 spontaneous (ly) 10983 shielding 10986 April 13 10988 withdrawn from 10990 acknowledge In a sense, a code comprises a gigantic cipher alphabet, in which the basic plaintext unit is the word or the phrase; syllables and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
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