Implementing-cryptography-using-python

Index ■ I–M 281
hashlib module, 28–29
Header + Data Units (HDUs), 195
Hellman, Martin, 162, 224
helper file
creating one for constructing plaintext
communications application, 251–252
modifying of for implementing PKI in
application using RSA certificates,
258–259
modifying of in implementing Diffie-
Hellman key exchange, 266–270
hexdigest, conversion to plaintext, 140–141
hexdigest() method, 204
hexlify module, 140
hidden secret, for incorporating message
hashing, 201
Hill 2x2, 83–87
H(m) (notation in cryptographic protocols),
37
I
IDEA, 36
identity (as group axiom), 106
identity operators, 16
IF statement, 16
image cryptography
AES and block modes of operation, 180–187
applying examples, 186
exploring simple CBC mode example,
185–186
exploring simple ECB mode example,
181–185
file cryptography using Fernet, 175–179
overview, 175–176
steganography, 187–197
using Fernet, 179–180
images
cryptography libraries, 174–175
image cryptography, 175–187
simple image cryptography, 171–174
storing binary file inside, 192–194
storing message inside, 188–191
using cryptography with, 171–197
working with large ones, 195–197
immutable, 24
import command, 28
import math call, 28
in membership operator, 15
indentation, misuse of, 10
index() method, 25
indices
negative index, 22
positive index, 22
infinite one-time pad, 164
infrastructure, 255–256
installing
additional packages, 5–8
Chryptography package, 7–8
IPython, 8
Matplotlib, 5–7
Pip, 5–7
Python, 3–8
testing, 9
Wireshark, 253–254
Integer Counter mode, 162–164
integer factorization, 97
inter-realm authentication, 40
inverse (as group axiom), 106
IPython, 8
is identity operator, 16
is not identity operator, 16
is_prime() function, 103
K
-K A (notation in cryptographic protocols), 37
K A,B (notation in cryptographic protocols), 37
Kerberos protocol, 36, 39–40
Kerckhoffs, Auguste, 61
key distribution problem, 223
key escrow, 33
key exchange, 34
key space, use of term, 49
Known-Plaintext (KPA), 50
Koblitz, Neal, 239
L
lambda functions, 125
length extension attack, 209–210
libraries
bcrypt library, 69
binascii library, 140
configuring your first cryptographic
library, 47
cryptography libraries, 174–175
Fernet library, 175
linear equations, solving systems of,
117–119
linear-feedback register (LPSR), 146
list() function, 25
list sequence type, 20–21, 24, 25
logical operators, 13–14
loops, use of, 17–19
M
(m 1, . . . , m n ) (notation in cryptographic
protocols), 37
MAC encryption, for incorporating message
hashing, 200
macOS, installing Python on, 4