Internet Security - Dang Thanh Binh's Page

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opad 160 bits (SHA-1) 128 bits (MD5) HASH FUNCTION, MESSAGE DIGEST AND HMAC 157 ipad IV K Padding K′ = 512 bits || H IV HMAC(M) b = 512 bits Ω i = K′⊕ipad ≡ b M b = 512 bits M b b b b Ωi|| M Ωi M0 M1 … ML−1 Ωo = 512 bits 160 bits (SHA-1) h = 160 bits (SHA-1) 128 bits (MD5) 128 bits (MD5) H Padding h′= 512 bits b = 512 bits Figure 4.14 Overall operation of HMAC computation using either MD5 or SHA-1 (message length computation is based on �i||M). �i = K ′ ⊕ ipad = K ′ ⊕ (0x3636 ...36) = 07cc4654 f26725d5 104fcb25 65812452 36363636 36363636 36363636 36363636 36363636 36363636 36363636 36363636 36363636 36363636 36363636 36363636 M ′ = 1a7fd53b 4c800000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000228 �i||M ′ : 07cc4654 f26725d5 104fcb25 65812452 36363636 36363636 36363636 36363636 36363636 36363636 36363636 36363636 36363636 36363636 36363636 36363636 1a7fd53b 4c800000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000228
158 INTERNET SECURITY h = H(M ′ , IVi) = Inner SHA-1 = 9691eb0c d263a12f ab7e0e2f e60ced5f 546c857a �o = K ′ ⊕ opad = K ′ ⊕ (0x5c5c ...5c) = 6da62c3e 980d4fbf 7a25a14f 0feb4e38 5c5c5c5c 5c5c5c5c 5c5c5c5c 5c5c5c5c 5c5c5c5c 5c5c5c5c 5c5c5c5c 5c5c5c5c 5c5c5c5c 5c5c5c5c 5c5c5c5c 5c5c5c5c h ′ = 9691eb0c d263a12f ab7e0e2f e60ced5f 546c857a 80000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 000002a0 �o||h ′ : 6da62c3e 980d4fbf 7a25a14f 0feb4e38 5c5c5c5c 5c5c5c5c 5c5c5c5c 5c5c5c5c 5c5c5c5c 5c5c5c5c 5c5c5c5c 5c5c5c5c 5c5c5c5c 5c5c5c5c 5c5c5c5c 5c5c5c5c 9691eb0c d263a12f ab7e0e2f e60ced5f 546c857a 80000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 000002a0 HMAC[�o||h ′ ] = Outer SHA-1 = c19e1236 ae346195 16594259 4c5202b3 4a85c5e The alternative operation for computation of either HMAC-MD5 or HMAC-SHA-1 is based on the following expression: HMAC = H [H [M,(IV)i],(IV)o] (IV)i = f[(K ′ ⊕ ipad), IV] (IV)o = f[(K ′ ⊕ opad), IV] K ′ = K||(0x00 ...0) (512bits) The procedure can be explained in words as follows: 1. Append zeros to K to create a b-bit string K ′ ,whereb = 512 bits. 2. XOR K ′ (padding with zero) with ipad to produce the b-bit block. 3. Apply the compression function f(K ′ ⊕ ipad, IV) to produce (IV)i = 160 bits for SHA-1. 4. Compute the hash code h with (IV)i and Mi.
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TEAMFLY
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Internet Security
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Copyright © 2003 John Wiley & Sons
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vi CONTENTS 2.3 World Wide Web 47 2
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viii CONTENTS 5.6 The Elliptic Curv
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x CONTENTS 10.2.5 De-militarised Zo
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Preface The Internet is global in s
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PREFACE xv Policy Approval Authorit
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PREFACE xvii classified into three
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1 Internetworking and Layered Model
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INTERNETWORKING AND LAYERED MODELS
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Layer No. 7 6 5 4 3 2 1 OSI Layer A
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2 TCP/IP Suite and Internet Stack P
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TCP/IP SUITE AND INTERNET STACK PRO
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Class A Class B Class C Class D Cla
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H Host H TCP/IP SUITE AND INTERNET
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Bits IP header TCP/IP SUITE AND INT
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3 Symmetric Block Ciphers This chap
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S-boxes L i−1 S 1 L i SYMMETRIC B
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K 1 48 bits K 2 48 bits K 16 48 bit
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Table 3.4 Initial permutation (IP)
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SYMMETRIC BLOCK CIPHERS 65 Table 3.
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SYMMETRIC BLOCK CIPHERS 67 This 48-
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SYMMETRIC BLOCK CIPHERS 69 The 48-b
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SYMMETRIC BLOCK CIPHERS 71 Thus, th
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SYMMETRIC BLOCK CIPHERS 73 Round K1
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SYMMETRIC BLOCK CIPHERS 75 Example
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64-bit plaintext X 1 X 2 X 3 X 4 Ro
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SYMMETRIC BLOCK CIPHERS 81 The outp
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SYMMETRIC BLOCK CIPHERS 83 the corr
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SYMMETRIC BLOCK CIPHERS 87 of S and
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Step 3 i = j = 0; A = B = 0; SYMMET
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3.3.3 Encryption SYMMETRIC BLOCK CI
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A SYMMETRIC BLOCK CIPHERS 93 A B
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3.4 RC6 Algorithm SYMMETRIC BLOCK C
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Mixing in the secret key S A = B =
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Magic constants: Pw = b7e15163 Qw =
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A = ((A − S[2i]) >>> u) ⊕ t } D
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Converting the secret key from byte
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The final decrypted plaintext is: b
Page 128 and 129: Thus, the final decrypted plaintext
Page 130 and 131: Multiplication SYMMETRIC BLOCK CIPH
Page 132 and 133: where c0 = a0b0 c1 = a1b0 ⊕ a0b1
Page 134 and 135: Rcon[2] = [x 1 , {00}, {00}, {00}]
Page 136 and 137: Table 3.16 AES key expansion i Temp
Page 138 and 139: SYMMETRIC BLOCK CIPHERS 117 ShiftRo
Page 140 and 141: Start of round After SubByte SYMMET
Page 142 and 143: SYMMETRIC BLOCK CIPHERS 121 Figure
Page 144 and 145: 4 Hash Function, Message Digest and
Page 146 and 147: M = 64 bits C 0 = 28 bits D 0 = 28
Page 148 and 149: HASH FUNCTION, MESSAGE DIGEST AND H
Page 150 and 151: ⊕ : Bit-by-bit XORing of 16-bit s
Page 152 and 153: P(Ω 1 )
Page 156 and 157: K r : Concatenation IP : Initial pe
Page 162 and 163: a b c d HASH FUNCTION, MESSAGE DIGE
Page 174 and 175: H2 = 98badcfe H3 = 10325476 H4 = c3
Page 182 and 183: 5 Asymmetric Public-key Cryptosyste
Page 184 and 185: User A Generate secret random integ
Page 186 and 187: ASYMMETRIC PUBLIC-KEY CRYPTOSYSTEMS
Page 188 and 189: Message m −1 E p q ASYMMETRIC PUB
Page 192 and 193: Message m −1 User A A′ private
Page 196 and 197: To decipher the message m, first co
Page 202 and 203: a q ≡ 1(modp) a ASYMMETRIC PUBLIC
Page 208 and 209: Receiver: (verifying) Compute: w
Page 210 and 211: � y2 − y1 x3 = ASYMMETRIC PUBLI
Page 212 and 213: The square of the integers in Z ∗
Page 216 and 217: and y3 = x2 1 + � x1 + y1 = α 12
Page 222 and 223: 6 Public-key Infrastructure This ch
Page 224 and 225: PUBLIC-KEY INFRASTRUCTURE 203 LDAP
Page 226 and 227: Session key DES Plaintext m One-way
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PUBLIC-KEY INFRASTRUCTURE 207 Let u
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PUBLIC-KEY INFRASTRUCTURE 209 sent
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Publication of PAA’s public key G
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PUBLIC-KEY INFRASTRUCTURE 213 • P
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Carry out identification and authen
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PUBLIC-KEY INFRASTRUCTURE 217 With
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PUBLIC-KEY INFRASTRUCTURE 219 The s
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6.4.4 X.500 Distinguished Naming PU
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PUBLIC-KEY INFRASTRUCTURE 223 certi
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PUBLIC-KEY INFRASTRUCTURE 225 • I
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Certificate fields v1 = v2 = v3 (fo
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PUBLIC-KEY INFRASTRUCTURE 229 CRL s
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Subject directory attributes extens
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PUBLIC-KEY INFRASTRUCTURE 233 the s
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PUBLIC-KEY INFRASTRUCTURE 235 • S
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PUBLIC-KEY INFRASTRUCTURE 237 not h
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6.7.1 Basic Path Validation PUBLIC-
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PUBLIC-KEY INFRASTRUCTURE 241 It is
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244 INTERNET SECURITY The set of se
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246 INTERNET SECURITY • Key manag
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248 INTERNET SECURITY 7.1.3 Hashed
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250 INTERNET SECURITY A B C D IV 67
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252 INTERNET SECURITY Next header (
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254 INTERNET SECURITY IPv4 IPv4 IPv
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256 INTERNET SECURITY within a 32-b
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258 INTERNET SECURITY addresses, wh
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260 INTERNET SECURITY If authentica
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262 INTERNET SECURITY 1 bit Next pa
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264 INTERNET SECURITY The Situation
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266 INTERNET SECURITY The Identific
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268 INTERNET SECURITY The Hash Data
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270 INTERNET SECURITY The Domain of
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272 INTERNET SECURITY to the exchan
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274 INTERNET SECURITY When a Key Ex
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276 INTERNET SECURITY When a Notifi
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278 INTERNET SECURITY SSL Handshake
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280 INTERNET SECURITY SSL record he
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282 INTERNET SECURITY SSLCompressed
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284 INTERNET SECURITY • bad-certi
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286 INTERNET SECURITY - Random: Thi
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288 INTERNET SECURITY Note that Dis
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290 INTERNET SECURITY The finished
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292 INTERNET SECURITY key_block = M
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294 INTERNET SECURITY opad 160 bits
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296 INTERNET SECURITY - A B C D IV
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298 INTERNET SECURITY The PRF is th
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300 INTERNET SECURITY HMAC SHA1(S2,
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302 INTERNET SECURITY 8.3.4 Certifi
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9 Electronic Mail Security: PGP, S/
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ELECTRONIC MAIL SECURITY: PGP, S/MI
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Message packet M T FN H(M) ELECTRON
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Definition of multipart/encrypted:
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From: myrhee@tsp.snu.ac.kr To: kiis
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SignatureAlgorithmIdentifier ELECTR
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340 INTERNET SECURITY conform to a
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342 INTERNET SECURITY existing on a
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344 INTERNET SECURITY 10.2.7 VPN So
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346 INTERNET SECURITY Table 10.1 Te
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348 INTERNET SECURITY Table 10.3 SM
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350 INTERNET SECURITY Outside host
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352 INTERNET SECURITY Internet Pack
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11 SET for E-commerce Transactions
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11.2 SET System Participants SET FO
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SET FOR E-COMMERCE TRANSACTIONS 359
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Example 11.2 Message Integrity Chec
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User A 0x135af247c613e815 Message d
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E KSC (CAC) + E KSC (MD) D CAC MD V
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H MD D CRs K pg M’s cert E K#5 (C
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380 INTERNET SECURITY DS Dual Signa
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382 INTERNET SECURITY SA Security A
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384 INTERNET SECURITY 17. Borman, D
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386 INTERNET SECURITY 60. Harkins,
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388 INTERNET SECURITY 106. Metzger,
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390 INTERNET SECURITY 163. Wijnen,
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392 INDEX Authentication Header 243
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394 INDEX delete payload 269, 275,
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396 INDEX HTML tag 49 ending tag 49
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398 INDEX Java 48, 49 Joint Photogr
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400 INDEX packet filter 339, 341, 3
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402 INDEX secure payment processing
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404 INDEX transform # field 264, 27
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