$(n\text{,}M\text{,}d)\text{ code}$, 445

$GF(2^8)$, 73, 163

$GF(4)$, 69, 397, 479

$[n\text{,}k\text{,}d]\text{ code}$, 451

${\mathbf{Z}}_p$, 71

$\oplus$, 108, 137

$\varphi (n)$, 57

$a^r\equiv 1$ factorization method, 175, 192, 518, 544, 578

$p-1$ method, 188, 393, 396, 519, 546, 580

$q\text{-ary code}$, 442

$x^2\equiv y^2$ factorization method, 494, 501

${\mathit{G}}_{23}$, 463

${\mathit{G}}_{24}$, 459

3DES, 155

absorption, 238

acoustic cryptanalysis, 183

addition law, 384, 388, 404

AddRoundKey, 161

ADFGX cipher, 27

Adleman, 171

Advanced Encryption Standard (AES), 137, 160, 293

Aesop, 37

affine cipher, 12, 133, 380

Agrawal, 188

Alice, 2

anonymity, 325, 329

ASCII, 88

asymptotic bounds, 449

Athena, 299

Atkins, 193

attacks, 3

attacks on RSA, 177, 426

authenticated key agreement, 292

authenticated key distribution, 295

authentication, 8, 25, 196, 310, 314

automatic teller machine, 357, 361