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  • 5. 15. 25.35. 45.55. 65. 7

  • 5.1

  • rH(m)ke , k1=
  • Kk1,k2kn,K=f(k1,k2,kn)k1,k2,,knK

  • 5.2First VirtualSSLSecure Electronic Transactions (SET)

  • First VirtualFirst Virtual

  • First VirtualFV(First Virtual)FVFVFVemailFVFV

  • SSLSSL

  • Secure Electronic Transactions(SET)SETMasterCardVisa

  • SET1.2.3.4.5.6.7.8.9.

  • 5.3 /

  • SignedBank(Bank Name, Owners Name,Amount,Destination, Serial number)

  • NetCheque(USC)NetBill(Carnegie-Mellon Univ.)

  • 5.4Digital Cash

  • E-cash

  • kmi=(bank, amount, ki,currency), Kinb1, b2, , bk Bimibie e Bik-1BibiBiBjSigned(Bi)Signed(Bi)Signed(mi)

  • IdiFirst CYBER BankEncrypted :key(2i,m)IdiFirst CYBER BankEncrypted :key(2i+1,m)Idi+1First CYBER BankEncrypted :key(2i+2,m)Idi+1First CYBER BankEncrypted :key(2i+3,m)CustomerID = f(Idi,Idi)

  • NetCash(USC)DigiCash

  • 5.5ATM

  • MondexNatWest Bank 1996ATM VisaCashVISAMASTERCARDEUROPAYEMVVisaCashMondexVisaCashVISA1995VISA Visa Easy Entry

  • 5.6

  • CyberCoinMillicentMicroMint

  • 5.7

  • 1.07 0.54 ATM 0.27 PC 0.15 0.01