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Math 187
Prof. Garsia
(typed by Alex Brik)
04132010
SAMPLE QUIZ 2 solution.
1.
Decrypt the following
F G A A F G
V A A X G X
F A V F V A
F G F F G D
D F A F F F
X A X A G A
A A V A A F
X F X A G F
A A D V A X
G A D G A A
Knowing that it was encrypted using the ADFGVX encipherment scheme and the keys
SUMMER
7 2 4 6 5 9 1 8 10 3
Solution
:
ADFGVX key is
6
6
matrix  skipping characters already in the matrix and writing from left to right and from top
to bottom. Once SUMMER is written we will then write the rest of the alphabet (skipping
already written letters) and then digits 09.
A
D
F
G
V
X
A
S
U
M
E
R
A
D
B
C
D
F
G
H
F
I
J
K
L
N
O
G
P
Q
T
V
W
X
V
Y
Z
0
1
2
3
X
4
5
6
7
8
9
Now the ciphertext is to be arranged into the column so that the number of the columns
is the size of the permutation  10 in this case. Since there are 60 characters in the ciphertext,
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This note was uploaded on 09/22/2010 for the course MATH MATH187 taught by Professor Math187 during the Spring '10 term at UCSD.
 Spring '10
 MATH187
 Math

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