## Math 348 (Cryptography)

Spring 2006
Homework Assignments
All assignments are due on Tuesdays at the beginning of class.

text TK
Due Extra Problems
Section/Problems from book
1/24/06
(Tues)
Encrypt your name in Caesar (k=13);
encrypt 'cryptography' with k=1st letter of your last name
1.1#6,14; 1.2#13,18;
1.3#1; 1.4#1,6,9,12,19
1/31 Cryptoquote: IDIED IVJIE DJUUJ TGEIT JHAPG SJEEJ QUJPI
JOXJT GOTSJ EEGLS JVGOR - LN EXADD JSSJTWJ
2.3 #1,2; 2.4 #1,3 (affine);
3.1 #3,4
2/7 Jumbles: GYROL SONDY TEASET MARPHE SNSPEAGER
Find Hill Cipher key if B=3, e(DAABBACDB)=(DUDDABIFK)
Decrypt Hill cipher HBBBABSBIIHI with B=2, probable word 'BEARS'
3.2 #7,9;       3.3 #4,7,11;
3.4 #1,2,9,10;    3.5 #1,3;
8.1 #1,2
2/14 Decrypt the first Vigenere text handed out in class using a Kasiski attack 4.1 #2,7,8,9;     4.3 #1,4,10
2/21 Decrypt the second Vigenere text handed out in class using a Friedman attack No additional problems
2/28

6.2 (DES) #1, #2
7.8 #2,5,6,7,8,10,12
10.4 #1
3/7

10.2 (RSA) #1,2,3,4,5,6,7,8
4/4

16.1 #1,2,3,4,5,6,7,8, 16.2 #1
4/11

16.4 #1, 16.6 1-7
4/18

27.1 #1,3,9,10,11,12; 27.2 #1,8
4/25
(half assignment)
24.1 #1,2,3, 24.2 #3
5/4 Final Exam (12-3 PM) in ARC 207