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1. keys: The following example illustrates simplified version of DES encryption using 2 k1, k2 and algorithm is addition x 0 1 23 4 5

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1. keys: The following example illustrates simplified version of DES encryption using 2 k1, k2 and algorithm is addition x 0 1 23 4 5 6 7 8 9 10 11 12 y |6|7 |8 |9 |10|11|12 |0 |1 |2|3 |4 |5 Plaintext is x selected from above table as input to generate 1st ciphered text: y1 (x+ 6) mod 13 [divide sum of (x+6) by 13 and pick up reminder if sum > 13, if sum is

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