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COB 302

Management Information System (Lesson 8)

Dr. Stanley Wong

Macau University of Science and Technology

Chapter 13

Security and Ethical Challenges 安全與倫理挑戰

安全與倫理挑戰 安全與倫理挑戰 安全與倫理挑戰

Remarks:

Some of the contents in this series of files are taken from the course book (Management Information Systems by O’Brien and Marakas) and other materials published by McGraw-Hill.

(2)

• Identify several ethical issues on how the use of information technologies in business affects

– Employment – Individuality

– Working conditions – Privacy

– Crime – Health

– Solutions to societal problems

Learning Objectives

13-3

Learning Objectives

• Identify several types of security management strategies and defenses, and explain how they can be used to ensure the security of business applications of information technology

• Propose several ways that business managers and professionals can help to lessen the harmful effects and increase the beneficial effects

associated with the use of information

technology

(3)

IT Security, Ethics, and Society

13-5

IT Security, Ethics, and Society

• Information technology has both beneficial (有益) and detrimental (有害) effects on society and people

– Manage work activities to minimize the detrimental effects ( 盡量減少不利的影響 ) of information technology

– Optimize the beneficial effects (優化正面影響)

(4)

Business Ethics

• Managers in making decisions day-to-day may need to address the following ethics questions

– Equity (公平) – Rights (權利) – Honesty (誠實)

– Exercise of corporate power (行使公司權力)

13-7

Categories of Ethical Business Issues

知識產權 私隱權 公司信息安全

工作場所安全

(5)

AITP Standards of Professional Conduct

13-9

Responsible Professional Guidelines

• A responsible professional – Acts with integrity ( 誠信 )

– Increases personal competence ( 個人能力 ) – Sets high standards of personal performance – Accepts responsibility ( 承擔責任 ) for his/her

work

– Advances ( 提升 ) the health, privacy, and

general welfare of the public

(6)

Computer Crime

• Computer crime includes

– Unauthorized use, access, modification, or destruction of hardware, software, data, or network resources – The unauthorized release of information

– The unauthorized copying of software

– Denying (拒絕) an end user access to his/her own hardware, software, data, or network resources

– Using or conspiring (串謀) to use computer or network resources illegally to obtain information or tangible property

13-11

Hacking

• Hacking is

– The obsessive use (濫用) of computers

– The unauthorized access and use of networked computer systems

• Electronic Breaking and Entering

– Hacking into a computer system and reading files, but neither stealing nor damaging anything

• Cracker

– A malicious (惡意) or criminal (犯罪) hacker(黑客) who maintains knowledge of the vulnerabilities(漏洞) found for private advantage (私利)

(7)

Common Hacking Tactics

• Denial of Service (DoS,拒絕服務)

– Hammering(攻擊) a website’s equipment with too many requests for information(資訊請求)

– Clogging(堵塞) the system, slowing performance, or crashing the site

• Scans

– Widespread probes(試探) of the Internet to determine types of computers, services, and connections

– Looking for weaknesses

13-13

Common Hacking Tactics

• Sniffer (嗅探)

– Programs that search individual packets of data as they pass through the Internet

– Capturing passwords or entire contents

• Spoofing (偽冒)

– Faking an e-mail address or Web page to trick users into passing along critical information like passwords or credit card numbers

(8)

Common Hacking Tactics

• Trojan Horse (特洛伊木馬)

– A program that, unknown to the user, contains

instructions that exploit a known vulnerability in some software

• Back Doors

– A hidden point of entry to be used in case the original entry point is detected or blocked

• Malicious Applets (惡意小程序)

– Tiny Java programs that misuse your computer’s resources, modify files on the hard disk, send fake email, or steal passwords

13-15

Common Hacking Tactics

• War Dialing

– Programs that automatically dial thousands of telephone numbers in search of a way in through a modem connection

• Logic Bombs (邏輯炸彈)

– An instruction in a computer program that triggers a malicious act

• Buffer Overflow (緩存溢出)

– Crashing or gaining control of a computer by sending too much data to buffer

memory

撥號偵測閒置的數據機

(9)

Common Hacking Tactics

• Password Crackers

– Software that can guess passwords

• Social Engineering (社交工程)

– Gaining access to computer systems by talking unsuspecting company employees out of valuable information, such as passwords

• Dumpster Diving (垃圾桶尋寶)

– Sifting through a company’s garbage to find information to help break into their computers

13-17

直接向對方套話

Cyber Theft

• Many computer crimes involve the theft of money

• The majority are “inside jobs” that involve unauthorized network entry and alternation of computer databases to cover the tracks of the employees involved

• Many attacks occur through the Internet

• Most companies don’t reveal ( 不會透露 ) that they have been targets or victims ( 受害者 ) of

cybercrime ( 網絡犯罪 )

(10)

Unauthorized Use at Work

• Unauthorized use of computer systems and

networks is time and resource theft

(盜用時間和資源) – Doing private consulting

– Doing personal finances – Playing video games

– Unauthorized use of the Internet or company networks

• Sniffers

– Used to monitor network traffic or capacity – Find evidence of improper use

13-19

Internet Abuses (濫用 濫用 濫用 濫用) in the Workplace

– General email abuses

– Unauthorized usage and access – Copyright infringement/plagiarism – Newsgroup postings

– Transmission of confidential data – Pornography

– Hacking

– Non-work-related download/upload – Leisure use of the Internet

– Use of external ISPs – Moonlighting

(11)

Software Piracy

• Software Piracy

– Unauthorized copying of computer programs

• Licensing

– Purchasing software is really a payment for a license for fair use (合理使用/公平使用) – Site license allows a certain number of copies A third of the software industry’s revenues are lost to A third of the software industry’s revenues are lost to

piracy piracy

13-21

反思:什麼是公平?

Theft of Intellectual Property

• Intellectual Property

– Copyrighted material

– Includes such things as music, videos, images, articles, books, and software

• Copyright Infringement is Illegal

– Peer-to-peer networking techniques have made it easy to trade pirated intellectual property

• Publishers Offer Inexpensive Online Music

– Illegal downloading of music and video is down and continues to drop

不公平的價格可能是知識產權盜竊的主要原因。

(12)

Viruses (病毒 病毒 病毒 病毒) and Worms (蠕蟲 蠕蟲 蠕蟲 蠕蟲)

• A virus is a program that cannot work without being inserted into another program

– A worm can run unaided (蠕蟲是可以自動自我複製的病毒)

• These programs copy annoying or destructive routines into networked computers

– Copy routines spread the virus

• Commonly transmitted through

– The Internet and online services – Email and file attachments

– Disks from contaminated computers – Shareware

13-23

The Cost of Viruses, Trojans, Worms

Cost of the top five virus families

Nearly 115 million computers in 200 countries were infected in 2004

Up to 11 million computers are believed to be permanently infected

In 2004, total economic damage from virus proliferation was $166 to $202 billion

Average damage per computer is between $277

and $366

(13)

Adware and Spyware

• Adware (廣告軟件)

– Software that purports (看來) to serve a useful purpose, and often does

– Allows advertisers to display pop-up and banner ads without the consent of the computer users

• Spyware (間諜軟件)

– Adware that uses an Internet connection in the background, without the user’s permission or knowledge

– Captures information about the user and sends it over the Internet

13-25

Spyware Problems

• Spyware can steal private information and also

– Add advertising links to Web pages – Redirect affiliate payments

– Change a users home page and search settings – Make a modem randomly call premium-rate phone

numbers

– Leave security holes (安全漏洞) – Degrade system performance

• Removal programs are often not completely

successful in eliminating spyware

(14)

Privacy Issues

• The power of information technology to store and retrieve information can have a negative effect on every individual’s right to privacy

– Personal information is collected with every visit to a Web site

– Confidential information stored by credit bureaus, credit card companies, and the government has been stolen or misused

13-27

Security Management of IT

• The Internet was developed for inter-operability (互通性), not impenetrability (互斥)

– Business managers and professionals alike are responsible for the security, quality, and performance of business information systems – Hardware, software, networks, and data

resources must be protected by a variety

of security measures

(15)

Security Management

• The goal of security

management is the accuracy (準確性), integrity (完整性), and safety of all information system processes (系統進程) and resources (資源)

13-29

Internetworked Security Defenses

• Encryption

– Data is transmitted in scrambled form

– It is unscrambled by computer systems for authorized users only

– The most widely used method uses a pair of public and private keys unique to each individual

(16)

Public/Private Key Encryption

13-31

Internetworked Security Defenses

• Firewalls

– A gatekeeper system that protects a company’s intranets and other computer networks from intrusion – Provides a filter and safe transfer point for

access to/from the Internet and other networks – Important for individuals who connect to the Internet

with DSL or cable modems

– Can deter hacking, but cannot prevent it

(17)

Internet and Intranet Firewalls

13-33

Denial of Service Attacks

• Denial of service attacks depends on three layers of networked computer systems

– The victim’s website

– The victim’s Internet service provider

– Zombie or slave computers that have been

commandeered by the cybercriminals

(18)

Defending Against Denial of Service

• At Zombie (殭屍) Machines

– Set and enforce security policies (制定和執行安 全政策)

– Scan for vulnerabilities (漏洞掃描)

• At the ISP

– Monitor and block traffic spikes (尖峰)

• At the Victim’s Website

– Create backup servers and network connections

13-35

Internetworked Security Defenses

• Email Monitoring (郵件監控)

– Use of content monitoring software that scans for troublesome words that might compromise corporate security

• Virus Defenses (病毒防禦)

– Centralize the updating and distribution of antivirus software

– Use a security suite that integrates virus

protection with firewalls, Web security, and

content blocking features

(19)

Other Security Measures

• Security Codes (安全碼)

– Multilevel password system – Encrypted passwords (加密密碼)

– Smart cards (智能卡) with microprocessors

• Backup Files (文件備份)

– Duplicate files of data or programs

• Security Monitors (安全監控)

– Monitor the use of computers and networks

– Protects them from unauthorized use, fraud (詐騙), and destruction (破壞)

13-37

Other Security Measures

• Biometrics (生物識別技術)

– Computer devices measure physical traits that make each individual unique (個人獨特的)

• Voice recognition, fingerprints, retina scan (視網膜掃描)

• Computer Failure Controls (電腦故障控制)

– Prevents computer failures or minimizes its effects – Preventive maintenance

– Arrange backups with a disaster recovery organization

(20)

Other Security Measures

In the event of a system failure, fault-tolerant

systems have redundant (冗餘) processors,

peripherals, and software that provide

– Fail-over capability (容錯移轉能力)

: shifts to

back up components

– Fail-save capability (故障保护能力)

: the

system continues to operate at the same level – Fail-soft capability (故障弱化能力)

: the system

continues to operate at a reduced but acceptable level

13-39

Other Security Measures

• A disaster recovery plan (災難恢復計劃) contains formalized procedures to follow in the event of a disaster

– Which employees will participate – What their duties will be

– What hardware, software, and facilities will be used – Priority of applications that will be processed

– Use of alternative facilities – Offsite storage of databases

(21)

Information System Controls

• Methods and devices that attempt to ensure the accuracy (準確性), validity (有效性), and

propriety (合乎規範) of information system activities

13-41

Auditing IT Security

• IT Security Audits

– Performed by internal or external auditors – Review and evaluation of security measures

and management policies

– Goal is to ensure that proper and adequate

measures and policies are in place

(22)

Protecting Yourself from Cybercrime

13-43

References

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