Chapter 30 - Electronic Commerce and Business

• Introduction • E-Commerce is Big Business

– all commercial transactions conducted over the Internet• shopping, online banking, invesing, bill paying

• Security Made E-commerce Possible (shopping cart)

• Secure Sockets (SSL)• Public Key Encryption Provides Authenticity

– Public key encryption is surprisingly general -- in addition to guaranteeing that messages remain confidential, it can be used to verify authenticity.

– Encryption Software Needs a Key

Chapter 30 - Electronic Commerce and Business

• Digital Signatures– A digital signature consists of a special form of

encrypted message; the encryption technology guarantees that a digital signature cannot be forged.

• Certificates Contain Public Keys • What is Digital Money? (like a debit card) • Digital Cash Is Not Widely Available

– micropayments

• Business and E-commerce • A Business Must Protect Its Networks

• Firewalls Protect Networks

Chapter 30 - Electronic Commerce and Business

• A Firewall Filters Packets • Firewalls Guard Against Trojan Horses

– A firewall is placed between a company and the Internet to restrict access to the company from the outside. To prevent a Trojan horse attack, the firewall also restricts access to the Internet from within the company.

• DEFINITIONS OF VIRUSES AND OTHER COMPUTER "VERMIN"

Chapter 30 - Electronic Commerce and Business

• Terms– e-commerce

– e-business

– shopping cart

– sockets

– public key encryption

– digital signature

– digital money

– firewall

– Trojan horse

– virus

– worm