Chapter 1: E-commerce Growth

Internet Growth Study of 2000 companiesBy 2002, over a trillion dollars in revenue

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1998 1999

Internet Co.

E-commerce

Billions of dollars

E-business & E-commerce

Revolutionize conventional business models

Transition from brick and mortarPersonalize user’s experiencePrivacy InvasionMultimedia and e-commerce packaged

Intro to Computers

Hardware– Input, output, memory – ALU, CPU, storage

Languages– Machine– Assembly– High level

Structured Programming

Internet History– 60’s ARPAnet

– TCP/IP

– DARPA

– Csnet

– 80’s Internet

– 90’s WWW

Internet Software youshould know will learn

Browsers– IE, Netscape

E-mailChat ftp

HTMLJavascriptDHTMLVBscriptXMLASP

Chapter 3: e-Business A company that has a online presence

Storefront model– Shopping cart technology -- amazon.com– Shopping mall – mall.com

Auction model – liquidprice.com, ebay.comDynamic pricing model

– Name your price – priceline.com– Comparison Pricing – Bottomdollar.com– Demand Sensitive Pricing – www.mercata.com– Bartering, rebates, free products and services

Portal model – hotbot.com

E-businesses

Business to business (B2B) – Buying, selling,

partnering, bartering, trading

Online trading and lending

Getting loansRecruitingNews

TravelEntertainmentAutomotiveEnergySelling Brain

PowerArtE-learning

Chapter 4 – Internet Marketing5 – Online Monetary Transacts

Advertising on the web

Choosing a domain name

….Take Dr. Orvis’

course, not mine

Chapter 6 – Legal, Ethical and Social Issues; Internet Taxation

Right to Privacy– Cookies– Tracking devices– Employer/Employee– User protection:

PrivacyX.com– Business protection:

PrivacyBot.com

Legal Issues– Defamation of char– Sexually explicit

speech– Children (netnanny)– Intellectual Property– Copyright Issues

mp3, napster…

Social Issues; Internet Taxation

TrademarksDomain RegistrationUnsolicited

commercial e-mail (SPAM

Online AuctionsOnline Contracts

Social IssuesOnline communitiesActivismdisabilities

Global IssuesTaxation

Chapter 7: Computer and Network Security

Secure Transactions– Privacy: captured or passed on– Integrity: altered– Authentication: prove identities– Non-repudiation: prove message sent or

received

Cryptography

Transform data using a keyPlaintext: UnencryptedCiphertext: encrypted dataCipher or cryptosystem – encryption algo.Substitution cipherTransposition cipherThe longer the key (128 bits), the stronger the

encryption

Secret key cryptography symmetric cryptography

Both sender and receiver need to know keyHow do you send the key securely?

– CourierKey distribution center (KDC)

– Session key generated– Sent to merchant and customer– Using key already held

Data Encryption Standard (DES)– 64 bit key example of symmetric crypto

Triple DES

Public key cryptography Asymmetric cryptography

Two inversely related keys– Private key: kept secret by owner

– Public key: freely distributed

Cannot deduce private key from publicSender encrypts using receiver’s public keyReceiver decrypts using receiver’s private keyKeys are mathematically relatedComputational intensive

Symmetric vs. Asymmetric cryptography

Asymmetric not efficient for large amounts of dataUse public key to determine key for symmetric

encryption on insecure mediumKey agreement protocol

– Process by which two parties can exchange keys over insecure medium

– Protocol sets the rules for communicationDigital Envelope

– Message encrypted using symmetric secret key– Sym secret key encrypted using public-key encrypt– Sends both as one message

Security Protocols

Secure Sockets Layer (SSL)– Netscape; secure communication on web

– Public key technology and digital certificates

– Does not protect private info like credit cards

Secure Electronic Transaction (SET) – Protocol developed by Visa and MasterCard

– Digital certificates to authenticate

– Public key

– Merchant never sees credit card info

Security Attacks

Denial of service– Disrupt service, attack routing tables– Network resources taken up by unauthorized users

Viruses– Attached to other programs– Replicates, corrupts files– Melissa and ILOVEYOU

Worms– Like viruses but do not need to be attached

Viruses

HackersTransient virus

– Attaches to specific program. Live during executionLogic bomb and time bomb

– Triggers when given condition metTrojan horse

– Hides in friendly programWeb defacing

– Enter Web site and change contents

Network Security

Firewalls– Protect LAN from outside

Packet filtering firewall– Filters packets from outside with local addresses– Does not examine data viruses

Application-level gateway– Screen actual data– Firewalls

Kerberos– MIT, symmetric secret key, internal attacks– Ticket Granting Service maintains DB of valid users

Chapter 8: Hardware, Software and Communications

Internet Structure– Host computers with IP address– Packets with source address, destination address,

sequencing information, error-control information– Routers: move packets efficiently. Failures.

Hardware– Server: Web, e-mail, database, file– Client– Communication Media:Wire, fiber, satellite,

microwave, repeater– Storage Area Networks (SANs): high-capacity

data delivery and storage on a network

Connecting to the Internet

Internet Service Provider (ISP)– Analog to digital (modem)

Digital Subscriber Lines (DSL)– High bandwidth of existing copper (upto 55Mbps)– Special HW at phone co; speed decrease over distance

Broadband– High bandwidth provided by cable TV and tele co.– Cable modem (downstream 384Kbps –1.5Mbps)

Integrated Services Digital Network(ISDN)– High-speed connections (128Kbps)– Need Terminal Adaptor (TA) and ISP $$

Wireless: Cell phones, palmsWebTV: Connect TV to ISP

Software

Application Service Providers (ASPs)– Maintain application and update as needed– Provide Virtual Private Networks (VPNs)– Point-to-point tunneling protocol (PPTP)

Operating Systems (OS)– Linux

Databases (DB)– Relational – DBMS– SQL