Lecture 10.pptx For dpt computer security
- 1. Lecture 10 COMPUTER SECURITY AND SAFETY,ETHICS AND PRIVACY
- 2. Computer Security Risks A computer security risk is any event or action that could cause a loss of or damage to computer hardware, software, data, information, or processing capability. A cybercrime is an online or Internet-based illegal act. Hackers Crackers Script Kiddies
- 4. Internet and Network Attacks Information transmitted over networks has a higher degree of security risk than information kept on an organization’s premises An online security service is a Web site that evaluates your computer to check for Internet and e-mail vulnerabilities
- 5. Internet and Network Attacks
- 6. Internet and Network Attacks An infected computer has one or more of the following symptoms:
- 7. Internet and Network Attacks
- 8. Internet and Network Attacks A botnet is a group of compromised computers connected to a network. A compromised computer is known as a zombie. A denial of service attack (DoS attack) disrupts computer access to Internet services Distributed DoS (DDoS) A back door is a program or set of instructions in a program that allow users to bypass security controls Spoofing is a technique intruders use to make their network or Internet transmission appear legitimate
- 9. Internet and Network Attacks A firewall is hardware and/or software that protects a network’s resources from intrusion
- 10. Unauthorized Access and Uses
- 11. Unauthorized Access and Use Organizations take several measures to help prevent unauthorized access and use Acceptable use policy Disable file and printer sharing Firewalls Intrusion detection software
- 12. Unauthorized Access and Use Access controls define who can access a computer, when they can access it, and what actions they can take Two-phase processes called identification and authentication User name Password Passphrase CAPTCHA
- 13. Unauthorized Access and Use
- 14. Unauthorized Access and Use Digital forensics is the discovery, collection, and analysis of evidence found on computers and networks. Many areas use digital forensics.
- 15. Hardware Theft and Vandalism Hardware theft is the act of stealing computer equipment Hardware vandalism is the act of defacing or destroying computer equipment
- 16. Hardware Theft and Vandalism To help reduce the of chances of theft, companies and schools use variety of security measures.
- 17. Software Theft Software theft occurs when someone:
- 18. Software Theft A single-user license agreement typically contains the following conditions:
- 19. Information Theft Information theft occurs when someone steals personal or confidential information Encryption is a process of converting readable data into unreadable characters to prevent unauthorized access
- 21. Information Theft A digital signature is an encrypted code that a person, Web site, or organization attaches to an electronic message to verify the identity of the sender Often used to ensure that an impostor is not participating in an Internet transaction Web browsers and Web sites use encryption techniques.
- 22. System Failure A system failure is the prolonged malfunction of a computer A variety of factors can lead to system failure, including: Aging hardware Natural disasters Electrical power problems Noise, under-voltages, and over-voltages Errors in computer programs
- 23. Backing Up – The Ultimate Safeguard A backup is a duplicate of a file, program, or disk that can be used if the original is lost, damaged, or destroyed. To back up a file means to make a copy of it Offsite backups are stored in a location separate from the computer site.
- 24. Wireless Security Wireless access poses additional security risks About 80 percent of wireless networks have no security protection War driving allows individuals to detect wireless networks while driving a vehicle through the area
- 25. Health Concerns of Computer Use The widespread use of computers has led to health concerns Repetitive strain injury (RSI) Computer vision syndrome (CVS)
- 26. Health Concerns of Computer Use Computer addiction occurs when the computer consumes someone’s entire social life Symptoms of users include: Craves computer time Overjoyed when at the computer Unable to stop computer activity Irritable when not at the computer Neglects family and friends Problems at work or school
- 27. Ethics and Society Computer ethics are the moral guidelines that govern the use of computers and information systems Information accuracy is a concern Not all information on the Web is correct
- 28. Ethics and Society Intellectual property rights are the rights to which creators are entitled for their work • A copyright protects any tangible form of expression An IT code of conduct is a written guideline that helps determine whether a specific computer action is ethical or unethical
- 29. Ethics and Society Green computing involves reducing the electricity and environmental waste while using a computer.
- 30. Ethics and Society Information privacy refers to the right of individuals and companies to deny or restrict the collection and use of information about them Huge databases store data online It is important to safeguard your information
- 31. Ethics and Society A cookie is a small text file that a Web server stores on your computer Web sites use cookies for a variety of reasons:
- 32. Ethics and Society Spam is an unsolicited e-mail message or newsgroup posting E-mail filtering blocks e-mail messages from designated sources Anti-spam programs attempt to remove spam before it reaches your inbox
- 33. Ethics and Society Phishing is a scam in which a perpetrator sends an official looking e-mail message that attempts to obtain your personal and financial information Pharming is a scam where a perpetrator attempts to obtain your personal and financial information via spoofing
- 35. Ethics and Society Content filtering is the process of restricting access to certain material on the Web Many businesses use content filtering Internet Content Rating Association (ICRA) Web filtering software restricts access to specified Web sites
- 36. Summary
Editor's Notes
- #2: Hackers: A hacker is an individual who uses computer, networking or other skills to overcome a technical problem. Crackers: A cracker is one who breaks into or otherwise violates the system integrity of remote machines with malicious intent. Having gained unauthorized access, crackers destroy vital data, deny legitimate users service, or cause problems for their targets.