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Internet transactions and security

Unit objectives Learn how to purchase goods online

by using credit cards and Web-based forms

Describe the concepts of Web security, cookies, caches, Web site protection, digital certificates, encryption, and firewalls

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Topic A

Topic A: Internet transactions Topic B: Web security considerations

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Internet transactions

E-commerce business models:– Business-to-business– Business-to-consumer– Business-to-employee– Business-to-government– Government-to-consumer– Consumer-to-consumer

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To ensure secure ordering, check:

Store credentials The company has a registered Web

site The company’s contact information is

listed The company’s return and refund

policies The Web site host is a secure server

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Topic B

Topic A: Internet transactions Topic B: Web security considerations

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Cookies

Store information on user’s computer Contain details of user’s visit Used by Web site for revisits Stored in the folder

C:/Windows/Cookies

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Cache

Stores a local copy of a Web page Increases the speed of browsing Displays a local copy

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Protecting a Web site

Encrypt HTML code Disable page caching Disable right-clicking and printing Password-protect the site Insert a copyright notice Install firewalls

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Digital certificates

Authenticate the holder Are issued by a trusted third party Two types of certificates:

– Server – Personal

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Encryption

Translates information into an unreadable format

Used to protect– Code– E-mail messages– Internet transactions– Any communication between server and

client

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Firewalls

Electronic mechanism to block– Unauthorized users– Spam– Viruses

Software program, hardware device, or combination of both

Inspect and filter all incoming traffic Placed between an intranet and the

Internet

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Unit summary

Learned about purchasing goods online by using credit cards and Web-based forms

Learned about the concepts of Web security, cookies, caches, Web site protection, digital certificates, encryption, and firewalls