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Chapter 18: Doing Business on the Internet

Chapter 18: Doing Business on the Internet. Business Data Communications, 4e. Security: The Key to E-Commerce. Communications Encryption Privacy payment systems. SSL & TLS. Secure Socket Layer Transport Layer Security

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Chapter 18: Doing Business on the Internet

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  1. Chapter 18:Doing Business on the Internet Business Data Communications, 4e

  2. Security: The Key to E-Commerce • Communications • Encryption • Privacy • payment systems Business Data Communications, 4e

  3. SSL & TLS • Secure Socket Layer • Transport Layer Security • Protocols that sit between the underlying transport protocol (TCP) and the application Business Data Communications, 4e

  4. Secure Socket Layer (SSL) • Originated by Netscape • TLS has been developed by a working group of the IETF, and is essentially SSLv3.1 • Provides security at the “socket” level, just above the basic TCP/IP service • Can provide security for a variety of Internet services, not just the WWW Business Data Communications, 4e

  5. SSL Implementation • Focused on the initialization/handshaking to set up a secure channel • Client specifies encryption method and provides challenge text • Server authenticates with public key certificate • Client send master key, encrypted with server key • Server returns an encrypted master key • Digital signatures used in initialization are based on RSA; after initialization, single key encryption systems like DES can be used Business Data Communications, 4e

  6. Characteristics of On-Line Payment Systems • Transaction types • Means of settlement • Operational characteristics • Privacy and security • Who takes risks Business Data Communications, 4e

  7. Secure Electronic Transactions • SET is a payment protocol supporting the use of bank/credit cards for transactions • Supported by MasterCard, Visa, and many companies selling goods and services online • SET is an open industry standard, using RSA public-key and DES single-key encryption Business Data Communications, 4e

  8. SET Participants & Interactions Business Data Communications, 4e

  9. Ideal Components of Electronic Cash • Independent of physical location • Security • Privacy • Off-line payment • No need for third-party vendor • Transferability to other users • Divisibility • “Making change” Business Data Communications, 4e

  10. E-Cash • Created by David Chaum in Amsterdam in 1990 • Maintains the anonymity of cash transactions • Users maintain an account with a participating financial institution, and also have a “wallet” on their computer’s hard drive • Digital coins, or tokens, are stored in the wallet Business Data Communications, 4e

  11. Electronic Commerce Infrastructure • Intrabusiness • Intranet based • Supports internal transactions and transfers • Business-to-Business (BTB or B2B) • Extranet based • Business-to-Consumer (BTC or B2C) • Internet based Business Data Communications, 4e

  12. Importance of BTB Commerce Business Data Communications, 4e

  13. Firewalls • Used to provide security for computers inside of a given network • All traffic to/from network passes through firewall • Only authorized traffic is allowed through • Firewall itself is a secure system • Firewall performs authentication on users • Firewall may encrypt transmissions Business Data Communications, 4e

  14. Free Trade Zones (FTZ) • Area where communication and transactions occur between trusted parties • Isolated from both the external environment and the enterprise’s internet network • Supported by firewalls on both ends • Inside the FTZ, all communications can be in clear mode without any encryption • Necessary because logical boundaries between BTB and IB are becoming fuzzy. Business Data Communications, 4e

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