Index Index
additive identity, Definition
additive inverse, Definition
affine cipher, Paragraph Definition
Agripa, Heinrich Cornelius, Paragraph
al-Kindi, Paragraph
Alberti, Leon Battista, Paragraph
Arabic scholar, Paragraph
ASCII, Paragraph
atabash, Exercise
autokey, Paragraph
Babbage, Charles, Paragraph
base 10, Definition
base 2, Definition
Baudot Code, Figure
bi-gram, Exercise
binary, Definition
bitwsie addition, Definition
block cipher, Item
byte, Item
cipher, Definition Item
ciphertext space, Definition Item
code, Item
combination, Paragraph
crib, Paragraph Item Definition
crumb, Example
cryptanalysis, Definition Paragraph
cryptoanalysis, Item
cryptography, Item
cryptology, Item
decipher, Item
deciphering, Definition
decrypting, Definition
determinant, Definition
divisibility, Definition
exclusive or, Definition Item
factorial, Definition Paragraph Item Item
Feistel cipher, Subsection
formula (Alberti), Subsection
frequency analysis, Definition Item
Gilbert S. Vernam, Subsection
greatest common divisor, Item
ibn ad-Durayhim, Paragraph
identity matrix, Definition
index of coincidence, Item
inverse matrix, Definition
ITA2 Code, Figure
Kasiski, Friedrich, Paragraph
key schedule, Paragraph
key space, Definition Item
keyword cipher, Exercise
Logical Circuits, Subsubsection
matrix, Definition
modular equivalence, Definition Item
monoalphabetic substitution cipher, Definition Exercise Item
Morse Code, Subsection
multiplicative identity, Definition Item
multiplicative inverse, Definition Item Item
pangram, Paragraph
pangrams, Item
Perfect Secrecy, Subsubsection
perfect secrecy, Definition Theorem Item
permutation, Paragraph
pigpen cipher, Paragraph
plaintext space, Definition Item
polyalphabetic substitution cipher, Definition Item
polyphonic cipher, Item
prime divisors, Assemblage
prime factor, Definition
prime number, Assemblage Item Definition
reciprocal, Item
relatively prime, Definition Item
solutions
as an appendix, Appendix
steganography, Item
stream cipher, Definition Item
substitution cipher, Item
Unicode, Paragraph
zero divisor, Definition