Introduction to Computing

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1 Introduction to Computing Engr. Abdul-Rahman Mahmood MS, PMP, MCP, QMR(ISO9001:2000) alphapeeler.sf.net/pubkeys/pkey.htm pk.linkedin.com/in/armahmood abdulmahmood-sss alphasecure mahmood_cubix VC++, VB, ASP

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3 Objectives Understand how computer ethics affects IS Understand information privacy, accuracy, property, and accessibility Understand types of computer crime Understand the terms virus, worm, Trojan horse, and logic or time bomb Understand computer security

4 Information Systems Ethics Toffler s three waves of change (1) Agriculture, (2) Industrial (3) Information Age Computer Literacy Knowing how to use a computer Digital Divide That gap between those with computer access and those who don t have it Computer Ethics Standards of conduct as they pertain to the use of information systems Privacy Protecting one s personal information Identity theft Stealing of another s social security number, credit card number, or other personal information

5 Information Systems Ethics Information accuracy Deals with authentication and fidelity of information Information property Deals with who owns information about individuals and how information can be sold and exchanged

6 Information Systems Ethics Information accessibility Deals with what information a person has the right to obtain about others and how the information can be used Issues in information accessibility Carnivore: software application designed to be connected to Internet Service Providers computers and eavesdrops on all communications. Electronic Communications Privacy Act (ECPA): it offered stronger support for voice mail than it did for . No other laws at federal or state levels protect privacy Monitoring

7 Information Systems Ethics The need for a code of ethical conduct Business ethics Plagiarism Cybersquatting

8 Computer Crime Definition: the act of using a computer to commit an illegal act Authorized and unauthorized computer access Examples Stealing time on company computers Breaking into government Web sites Stealing credit card information Federal and State Laws Stealing or compromising data Gaining unauthorized computer access Violating data belonging to banks Intercepting communications Threatening to damage computer systems Disseminating viruses

9 Computer Crime Hacking and Cracking Hacker one who gains unauthorized computer access, but without doing damage Cracker one who breaks into computer systems for the purpose of doing damage Who commits computer crime?

10 Computer Crime Types of computer crime Data diddling: modifying data Salami slicing: skimming small amounts of money Phreaking: making free long distance calls Cloning: cellular phone fraud using scanners Carding: stealing credit card numbers online Piggybacking: stealing credit card numbers by spying Social engineering: tricking employees to gain access Dumpster diving: finding private info in garbage cans Spoofing: stealing passwords through a false login page Software piracy North America 25% Western Europe 34% Asia / Pacific 51% Mid East / Africa 55% Latin America 58% Eastern Europe 63%

11 Computer Crime Computer viruses and destructive code Virus a destructive program that disrupts the normal functioning of computer systems Types: Worm: usually does not destroy files; copies itself Trojan horses: Activates without being detected; does not copy itself Logic or time bombs: A type of Trojan horse that stays dormant for a period of time before activating

12 Computer Security Computer Security precautions taken to keep computers and the information they contain safe from unauthorized access Recommended Safeguards Implement a security plan to prevent break-ins Have a plan if break-ins do occur Make backups! Only allow access to key employees Change passwords frequently Keep stored information secure Use antivirus software Use biometrics for access to computing resources Hire trustworthy employees

13 Computer Security Encryption the process of encoding messages before they enter the network or airwaves, then decoding them at the receiving end of the transfer. How encryption works Symmetric secret key system Both sender and recipient use the same key Key management can be a problem Public key technology A private key and a public key Certificate authority To implement public-key encryption on a busy Web site, requires a more sophisticated solution. A third party, called certificate authority, is used. A trusted middleman verifies that a Web site is a trusted site (provides public keys to trusted partners) Secure socket layers (SSL), developed by Netscape, is a popular publickey encryption method

14 Computer Security Other encryption approaches Pretty good privacy (PGP) Phil Zimmerman RSA AES DES AlphaPeeler Clipper Chip: a chip that could generate uncrackable codes. Internet Security Firewall hardware and software designed to keep unauthorized users out of network systems

15 Computer Security

16 Computer Security Virus prevention Install antivirus software Make backups Avoid unknown sources of shareware Delete s from unknown sources If your computer gets a virus How to maintain your privacy online Choose Web sites monitored by privacy advocates Avoid cookies Visit sites anonymously Use caution when requesting confirming

17 Computer Security Avoid getting conned in cyberspace Internet auctions Internet access International modem dialing Web cramming Multilevel marketing (pyramid schemes) Travel/vacations Business opportunities Investments Health-care products

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