If any of you guys are seeing or saw this app. for linear algebra in your classes, I could use a hand... 1. The problem statement, all variables and given/known data A Hill 2-cipher is intercepted that starts with the pairs SL HK Find the deciphering and enciphering matrices, given that the plaintext is known to start with the word ARMY. 3. The attempt at a solution I managed to get the deciphering matrix... but how do you get the enciphering one? Thanks!