CRYPTOGRAPHY WORKSHOP
SUMMER 2002
Home
Outline
Handouts
Resources
Roster
Instructor
Activities
Activity #1
: Shift encoding
Activity #2
: MSC with word breaks
Activity #3
: Modular addition and subtraction
Activity #4
: Shift ciphers in Excel
Activity #5
: Cryptanalysis of shift ciphers
Activity #6
: Multiplication in modular arithmetic
Activity #7
: Dilation ciphers
Activity #8
: Affine functions and their inverses
Activity #9
: Decryption of affine ciphers
Activity #10
: Arithmetic on a cipher disk
Activity #11
: Affine alphabets
Activity #12
: Cryptanalysis of affine ciphers I
Activity #13
: Finding an affine key
Activity #14
: Vignère encryption and decryption
Activity #15
: Vignère cryptanalysis
Cryptograms
Cryptograms #1
: MSC with word breaks.
Cryptograms #2
: General MSC.
Cryptograms #3
: Shift ciphers.
Cryptograms #4
: Affine ciphers.
Cryptograms #5
: Wordkey ciphers.
Cryptograms #6
: Vignère ciphers.
Cryptograms #7
: General MSC cryptograms with probable words.
Cryptanalysis Tools
Blank frequency histograms
Standard frequency histogram
From a count of 30,700 letters in
The New York Times
Frequency table
From the same
Times
data
List of frequent bigrams
A Vignère square
The multiplication table modulo 26
The addition table modulo 26
Blank cipher disks