Implementing-cryptography-using-python

284 Index ■ T–Z
self-signed certificate, 45–46
semantics, understanding Python semantics,
20
sequence types, 20–26
server
creating one for constructing plaintext
communications application, 248–250
modifying of for implementing PKI in
application using RSA certificates,
256–257
server file, modifying of in implementing
Diffie-Hellman key exchange, 262–264
server socket, creating, 212–213
SHA, 203–204
Shamir, Edi, 34, 226
Shannon, Claude (father of information
theory), 31, 50
Shannon’s theorem, 50–51
shared key (SK), 34
side-channel attacks, 48
SIMD (single instruction, multiple data),
151–152
single quote (’), 11
Skipjack, 36
Smith, J. L., 159
social engineering, 48
sort() method, 25
Spartan scytale, 73
Standards of Efficient Cryptography (SEC),
241
Steganographia (Trithemius), 187–188
steganography
overview, 187–188
storing binary file inside image, 192–194
storing message inside image, 188–191
working with large images, 195–197
str sequence type, 20
stream ciphers
ARC4, 147–148
ChaCha cipher, 151–156
overview, 141–147
Salsa20 cipher, 149–151
Vernam cipher, 148–149
stream modes, 164–165
stretching (of passwords), 68
strings
use of, 11
using quotes to define, 21
subtraction - operator, 12
symmetric algorithms, 36
symmetric encryption, 8, 36, 39, 49, 176, 215–218
symmetric key, 35
symmetric key confidentiality, for
incorporating message hashing, 201
symmetric key protocol, 36
symmetric public key confidentiality, for
incorporating message hashing, 201
T
t A (notation in cryptographic protocols),
37
Ticket Granting Servers (TGS), 40
timestamping, 33
Transmission Control Protocol (TCP), 212,
214–215
Transport Layer Security (TLS), 33
Triple DES, 156
Trithemius, Johannes (author),
Steganographia, 187
Trivium, 145
trusted third party (TTP), 35
Tuchman, W. L., 159
tuple() function, 25
tuple sequence type, 20, 21, 24, 25
The Twelve Caesars, 74–76
U
Ubuntu, installing Python on, 4
unhexlify module, 140
Unicode sequence type, 20
User Datagram Protocol (UDP), 212
V
validation, formal validation of
cryptographic protocols, 46–47
values, as stored in variables, 10
variables, use of, 10–11
Vernam, Gilbert, 148
Vernam cipher, 148–149
Vignère cipher, 77–79, 129–137
W
W file operator, 19
W+ file operator, 19
while loop, 18
whitespace, as meaningful, 10
Windows, installing Python on, 4
Wireguard, 145
Wireshark, installing and testing, 253–254
X
X.509, 41–42
XOR, 50–55
xrange sequence type, 20, 21
Z
zero-knowledge proofs, 33