- #1
sfskseg32
- 2
- 0
Homework Statement
I cannot figure out how to find the decryption key for a hill cypher. My textbook and a bunch of websites say that is just the inverse of the encryption key, but that is not working for me.
Homework Equations
A =
[1,2,3]
[4,5,6]
[7,8,10]
The Attempt at a Solution
A^(-1) =
[-2/3, -4/3, 1]
[-2/3, 11/3, -2]
[1, -2, 1]
But this does not properly decrypt my message. Anyone know what I'm missing?