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H MD D CRs K pg M’s cert E K#5 (CRq) E Newly generated digital signature Merchant Capture request (CRq) SET FOR E-COMMERCE TRANSACTIONS 377 DES K#5 E K#4 (CT) E Compare CRs K pm : merchant's public key K sm : merchant's private key K pg : payment gateway's public key K sg : payment gateway's private key K pg D E K#6 (CRs) D D K sg DES K#6 D DES K#5 G’s cert CR q Ksm Gateway digital signature Payment gateway Capture response (CRs) DES K#4 Figure 11.9 Payment capture process. • The merchant verifies the gateway’s digital signature by decrypting it with the gateway’s public key and comparing the result with a newly generated message digest of the capture response. Figure 11.9 shows an overview of payment capture consisting of the merchant’s capture request and the gateway’s capture response. D E CT CT E H K pm DES K#6 E K sg MD E
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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
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Thus, the final decrypted plaintext
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Multiplication SYMMETRIC BLOCK CIPH
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where c0 = a0b0 c1 = a1b0 ⊕ a0b1
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Rcon[2] = [x 1 , {00}, {00}, {00}]
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Table 3.16 AES key expansion i Temp
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SYMMETRIC BLOCK CIPHERS 117 ShiftRo
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Start of round After SubByte SYMMET
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SYMMETRIC BLOCK CIPHERS 121 Figure
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4 Hash Function, Message Digest and
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M = 64 bits C 0 = 28 bits D 0 = 28
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HASH FUNCTION, MESSAGE DIGEST AND H
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⊕ : Bit-by-bit XORing of 16-bit s
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P(Ω 1 )
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K r : Concatenation IP : Initial pe
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a b c d HASH FUNCTION, MESSAGE DIGE
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H2 = 98badcfe H3 = 10325476 H4 = c3
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opad 160 bits (SHA-1) 128 bits (MD5
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5 Asymmetric Public-key Cryptosyste
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User A Generate secret random integ
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ASYMMETRIC PUBLIC-KEY CRYPTOSYSTEMS
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Message m −1 E p q ASYMMETRIC PUB
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Message m −1 User A A′ private
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To decipher the message m, first co
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a q ≡ 1(modp) a ASYMMETRIC PUBLIC
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Receiver: (verifying) Compute: w
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� y2 − y1 x3 = ASYMMETRIC PUBLI
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The square of the integers in Z ∗
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and y3 = x2 1 + � x1 + y1 = α 12
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6 Public-key Infrastructure This ch
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PUBLIC-KEY INFRASTRUCTURE 203 LDAP
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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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Page 348 and 349: Definition of multipart/encrypted:
Page 350 and 351: From: myrhee@tsp.snu.ac.kr To: kiis
Page 352 and 353: ELECTRONIC MAIL SECURITY: PGP, S/MI
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Page 371 and 372: 350 INTERNET SECURITY Outside host
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Page 376 and 377: 11 SET for E-commerce Transactions
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Page 386 and 387: Example 11.2 Message Integrity Chec
Page 388 and 389: User A 0x135af247c613e815 Message d
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Page 400 and 401: Acronyms ADCCP Advanced Data Commun
Page 402 and 403: ACRONYMS 381 LEAF Law Enforcement A
Page 404 and 405: Bibliography 1. Aboba, B., and D. S
Page 406 and 407: BIBLIOGRAPHY 385 37. Deering, S., a
Page 408 and 409: BIBLIOGRAPHY 387 85. Koblitz, N.,
Page 410 and 411: BIBLIOGRAPHY 389 137. Rekhter, Y.,
Page 412 and 413: Abstract Syntax Notation One 332 ac
Page 414 and 415: Cipher-Block Chaining mode 73 ciphe
Page 416 and 417: ESP header 253, 257 ESP payload dat
Page 418 and 419: IP 11, 13, 15 IP address 22, 23, 24
Page 420 and 421: Motion Picture Experts Group 327 MP
Page 422 and 423: protocol suite 12 protocol-id field
Page 424 and 425: client hello message 284 client hel
Page 426: X.509 certificate format 223 certif
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