00:01
Okay, this question wants us to encrypt the following message using the encryption matrix it gives us right here.
00:09
So the first thing it wants to do is us to write the uncoded row matrices.
00:18
So to find our row matrices, we need to figure out how long each block is.
00:28
And seeing how we have a two -by -two matrix here, we're going to be splitting into blocks of two.
00:35
So all we have to do is using blocks of two, remembering the spaces, just writing the numbers that represent each letter.
00:48
So the first block is just the c and the o.
00:52
So c is 3, and o is 15.
01:02
And then we're just going to keep going.
01:05
Then the m and the e are 13.
01:12
And 5 then we got to be careful because we have a space so spaces are zero and then we have an 8 and then we're moving on to the o and the m so o is 15 and the m is 13 and then we have and another space, so 5 and 0.
02:02
And then we just have the last block, which is so, so 19 and 15.
02:19
And then the last two characters are 15.
02:28
And 14.
02:34
So, just pretend that these are all in the line.
02:38
So this whole thing are uncoded row matrices...