Vignere ciphertext:

Plain Text:

Using the ciphertext, plaintext, and TABLE 2.4 above, explain how did the values that are squared from the table were obtained? Given key length is 5 (m=5). Given hint is that each of the number row i has 26 M_g values and each represents each letter of the alphabet from A through Z (starting from left to right). So for i = 1 --> 0.061 is the key that is associated with the letter J, i=2 --> 0.069 is the key that is associated with the letter A, i = 3 --> 0.066 is the key that is associated with the letter N, i = 4 --> 0.060 is the key that is associated with the letter E, and i = 5 --> 0.072 is the key that is associated with the letter T. So overall, the key is K = = in Z26. (You can just use i=1 and calculate the value 0.061 corresponding to the shift k_1 = 9, THANKS)....

CHREEVO AHMAERATBIAXXWTNXBEEOPHBSBQMQEQERBW RVXUOAKXAOSXXWEAHBWGJMMQMNKGRFVGXWTRZXWIAK LXFPSKAUTEMNDCMGTSXMXBTUIADNGMGPSRELXNJELX VRVPRTULHDNQWTWDTYGBPHXTFALJHASVBFXNGLLCHR ZBWELEKMSJIKNBHWRJGNMGJSGLXFEYPHAGNRBIEQJT AMRVLCRREMNDGLXRRIMGNSNRWCHRQHAEYEVTAQEBBI PEEWEVKAKOEWADREMXMTBHHCHRTKDNVRZCHRCLQOHP WQAIIWXNRMGWOIIFKEE The almond tree was in tentative blossom. The days were longer, often ending with magnificent evenings of corrugated pink skies. The hunting season was over, with hounds and guns put away for six months. The vineyards were busy again as the well-organized farm- ers treated their vines and the more lackadaisical neighbors hurried to do the pruning they should have done in November. 3 TABLE 2.4: Values of Mg i 1 2 3 .035 .061 .042 .069 .031 .034 .048 .049 .027 .045 .033 .037 .034 .037 .044 .031 ,039 .043 .044 .042 .037 .029 .035 .035 .032 .033 .050 .031 .033 .072 value of Mg(yi) .036 .037 .035 .039.028 .028 .048 .032 .040 .038 038 .045 .036 .030 .036 .033 .049 .043 042 036 .032 .035 .044 .034 .036 .033.029 .045 .040 .045 046 042 037 .032 .032.034 .043 .032 026 047 .042 043 .044 .034 .038 035 032 .031 .035 .066 .035 .038 .038 036 .045 .034 034 .036 .035 046 040 .033.038 .060 .034 034 034 .050 .043 .040 .033 .029.036 .040.044 .034 034 .039 .044 038 035 .035 .044 .047 .037 .043 .038 .042 .032 036 .037 .036 .045 .032.029 .037.027 .031 .048 .036 037 4 5 CHREEVO AHMAERATBIAXXWTNXBEEOPHBSBQMQEQERBW RVXUOAKXAOSXXWEAHBWGJMMQMNKGRFVGXWTRZXWIAK LXFPSKAUTEMNDCMGTSXMXBTUIADNGMGPSRELXNJELX VRVPRTULHDNQWTWDTYGBPHXTFALJHASVBFXNGLLCHR ZBWELEKMSJIKNBHWRJGNMGJSGLXFEYPHAGNRBIEQJT AMRVLCRREMNDGLXRRIMGNSNRWCHRQHAEYEVTAQEBBI PEEWEVKAKOEWADREMXMTBHHCHRTKDNVRZCHRCLQOHP WQAIIWXNRMGWOIIFKEE The almond tree was in tentative blossom. The days were longer, often ending with magnificent evenings of corrugated pink skies. The hunting season was over, with hounds and guns put away for six months. The vineyards were busy again as the well-organized farm- ers treated their vines and the more lackadaisical neighbors hurried to do the pruning they should have done in November. 3 TABLE 2.4: Values of Mg i 1 2 3 .035 .061 .042 .069 .031 .034 .048 .049 .027 .045 .033 .037 .034 .037 .044 .031 ,039 .043 .044 .042 .037 .029 .035 .035 .032 .033 .050 .031 .033 .072 value of Mg(yi) .036 .037 .035 .039.028 .028 .048 .032 .040 .038 038 .045 .036 .030 .036 .033 .049 .043 042 036 .032 .035 .044 .034 .036 .033.029 .045 .040 .045 046 042 037 .032 .032.034 .043 .032 026 047 .042 043 .044 .034 .038 035 032 .031 .035 .066 .035 .038 .038 036 .045 .034 034 .036 .035 046 040 .033.038 .060 .034 034 034 .050 .043 .040 .033 .029.036 .040.044 .034 034 .039 .044 038 035 .035 .044 .047 .037 .043 .038 .042 .032 036 .037 .036 .045 .032.029 .037.027 .031 .048 .036 037 4 5