Question

Assign each letter and black space to a number as shown by alphabet table below.

Answer 1

Use {{1,-2},{-3,7}} to encode the phrase "One question to go".

Answer 2

|15||14||5| ||17||21||5||19||20||9||15||14| ||20||15|| |7||15||

Answer 3

"{{1,-2},{-3,7}}" I meant that. I don't understand why it's there.

Also shouldn't you be using |0|'s for spaces?

Answer 4

I think im supposed to split the word "one question to go" in half and multiply the numbers by the 1,-2 and -3,7, but i dont really know.

and yes. i shouldnt have done ||

Answer 5

@nincompoop

Answer 6

@AccessDenied would you know this?

Answer 7

I agree that your [blank] spaces should be given numbers as well: |15|14|5| 0 | ...
Then we need to set up a matrix that is multiplied by the 2x2 Key matrix to create another matrix of equal size as the original. The new matrix will have new values, though, which is the "encoded" message once we disassemble it the same way we assembled the original matrix.

This was what I was referring to for this response that has some more information:
http://aix1.uottawa.ca/~jkhoury/cryptography.htm