3 The following cryptogram was encoded with a 2 x 2 matrix W

3. The following cryptogram was encoded with a 2 x 2 matrix. (Where each letter is originally assigned a number: 0 = space, 1 = A, 2 = B, 3 = C and so on). 5 2 25 11 -2 -7 -15 -l5 32 14 -8 -13 38 19 -19 -19 37 16 The last word of the message is _SUE. What is the message? Hint: Let A be the encoding matrix. Then you know that [0 19]A = [-19 -19] and [21 5]A = [37 16].

Solution

CANCEL_ORDERS_ _SUE