Dr. Jaffe
Advanced Topics in Mathematics
Homework due Tuesday 12/22
NAME: ____________________________________________________________
1. Why would a block cipher be less vulnerable to cryptanalysis then a transformation cipher?
2. Using the digraphic cipher that sends the plaintext block P 1P2 to the cipher text block C1C2 with
C1 ≡ 3P1 + 10P2 (mod 26)
C2 ≡ 9P1 + 7P2 (mod 26)
encipher the message BEWARE OF THE MESSENGER
3. Create your own digraphic cipher and encipher the message
I WISH THIS WOULD GET EASIER