Computer
Security
Part 1 of 2
Small book by Shelly
Cashman that came
with text.
Top 10 Hackers Who Got Caught
Gerald Martin hacked
into the system of a
company that
competed with his. –
NY Times
Anonymous “A Leaderless Hacker Group”
Figure 10-1, pg 382
Internet and Network Attacks
Virus Worm Trojan Rootkit
Infects, negatively
altering the way
computer works
Copies itself
r...
Figure 10-2 from pg 385
Trojan
Programs, 3.
90%
Viruses, 7.00
%
Network
Worms, 89.1
0%
Malicious Program Types
http://www.securelist.com/en/analys...
Safeguards against
computer viruses and
other malware
Figure 10-5 from pg 388 of your book
Safeguards
Hardware Theft and Vandalism
Software Theft
• End-User License Agreement (EULA)
Information Theft (Encryption)
Information Theft (Digital Signature)
System Failure
Uninterruptible Power Supply (UPS)
Backing Up – The Ultimate Safeguard
Wireless Security
Wireless Access Point (WAP)
802.11i network
For Next Time
• Read the rest of the Computer Security
booklet, page 398 to the end (p. 408). Be
prepared to take home tes...
Computer security
Computer security
Computer security
Computer security
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  • “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.Cybercrime is one of FBI’s Top 3 priorities.Hacker, originally a complimentary word for a computer enthusiast, now has a derogatory meaning and refers to someone who accesses a computer or network illegally. Some hackers claim the intent of their security breaches is to improve security.Cracker also is someone who accesses a computer or nework illegally but has the intent of destroying data, stealing information, or other malicious action. Both hackers and crackers have advanced and network skills.Script kiddie same intent as a cracker but does not have the technical skills and knowledge. Script kiddies use prewrittten hacking and cracking programs to break into computers.
  • Unethical employees break into their employers’ computers for a variety of reasons. Some simply want to explois a security weakness. Others seek financial gains from selling confidential information. Disgruntled employees may want revenge.Cyberextortionists is someone who uses em-mail as a vehicle for extortion. These perpetrators send an organization a threatening e-mail message indicating they will expose confidential information, exploit a security flaw, or launch an attack that will compromise the organization’s network – if they are not paid a sum of money.Cyberterroists-some
  • Cyberterroists-someone who uses the Internet or network to destroy or damage computers for political reasonss. The cyberterrorist might target the nation’s air traffic control system, electricity-generating companies, or a telecommunications infrastructure. Cyberterrorismusuuallyreuires a team of highly skilled individuals, millions of dollars, and several years of planning.Anonymous: Leaderless Hacker Group
  • Computer viruses, worms, Trojan Horses and Rootkits virus- potentially damaging computer program that affects, or infects, a computer negatively by altering the way the computer works without the user’s knowledge or permission. Once the virus infects the computer, it can spread throughout and may damage files and system software, including the operating system. worm; program that copies itself repeatedly, for example in memory or on a network, using up resources and possibly shutting down the computer or network Trojan horse a program that hides within or looks like a legitimate program. A certain condition or action usually triggers the Trojan horse. Unlike a virus or a worm, A Trojan horse does not replicate itself to other computers. rootkit- a program that hides in a computer an allows someone from a remote location to take full control of the computer. Once the rootkit is installed, the rootkit author can execute programs, change settings, monitor activity, and access files on the remote computerMalwarePayloadoperating system runs much slower than usualAvailable memory is less than expectedFiles become corruptedScreen displays unusual message or imageUnknown programs or files mysteriously appearMusic or unusual sound plas randomlyEisting programs and files disappearPrograms or files do not work properlySstem properties changeOperating system does not start upOperating system shutds down unexpectedly
  • More than 300,000 computer Web sites can infect your computer.Open an infected fileRuns an infected programBoots the computer with an infected removable media inserted in a drive or plugged into a portConnects an unprotected computer to a networkWhen a certain condition or event occurs such as computer’s clock changing to a specific date.A common way computer an become infected is through email.
  • Interesting Information, according to Securelist.com, a virus review for 2002, http://www.securelist.com/en/analysis/151436695/Virus_Review_2002 Two graphs stood out.Malicious Program Types Trojan Programs 3.9%, Viruses 7.0%, and Network Worms 89.1%AndMain Virus Threat Sources Portable Media 1.30%, Internet 2.30%, Email 96.40%
  • Anti virus programVirus signatureVirus definitionTips for preventing viruses and other malware. trusted sourceantivirus programsVirus signatureVirus definition- known specific code of virus codeQuarintine- a separate area of a hard disk that holds the infected file until the infection can be removed.Refer to TIPS for PREVENTING VIRUSES AND OTHER MALWARE
  • Botnets- a group of compromised computers connected to a network such as the Internet that are used as part of a network that attacks other networks, usually for nefarious purposes. A compromised computers, known as a zombie, is one whose owner is unaware the computer is being controlled remotely by an outsider. Cybercriminals use botnets to send spam via e-mail, spread viruses and other malware, or commit a denial of service attack.Denial of Service Attacks- disrupt computer access to an internet services such as the Web or emailBack Doors bypass security controlsSpoofing appear legitimate to a vitim or a network
  • Safeguards against Botnets, DoS Attacks, Back Doors and SpoofingFirewallsIntrusion Detection software
  • Safeguards against unauthorized access and useIdentifying and authenticating usersUser names and passwordsPossessed objects- any object you must carry to gain acess to a computer or comuter facility, badges, cards, smart cards, and keysBiometric devicesDigital Forensics
  • Safeguards Against Hardware Theft and Vandalism
  • Safeguards Against Software TheftLockup copies of your CDs
  • Safeguards against Information TheftEncryptionDigital signature
  • Safeguards against system failureAmount of protection to power strip is “proportiona to cost” the more expensive the more protection.Be sure to have protection for your modem, telephone lines, DSL lines, Internet cable lines and network lines.
  • Backing upBack upRestore
  • Wireless Access Point (WAP) should be configured so tha tit does not broadcast a netowrk name. configured so that certain devices can access it.
  • Wi-Fi Protected Access (WPA)- security standard that imiproves on older security standards by authenticating network users and providing more advanced encryptions tehnicques.
  • 802.11i network, sometimes called WPA2, the most recent network security standard, conforms to the governments security standards and uses ore sophisticated encryption techniques than WPA.Way beyond me!
  • Computer security

    1. 1. Computer Security Part 1 of 2 Small book by Shelly Cashman that came with text.
    2. 2. Top 10 Hackers Who Got Caught
    3. 3. Gerald Martin hacked into the system of a company that competed with his. – NY Times
    4. 4. Anonymous “A Leaderless Hacker Group”
    5. 5. Figure 10-1, pg 382
    6. 6. Internet and Network Attacks Virus Worm Trojan Rootkit Infects, negatively altering the way computer works Copies itself repeatedly, using up resources Needs certain condition to trigger, does not replicate Allows person to take over your computer from remote location.
    7. 7. Figure 10-2 from pg 385
    8. 8. Trojan Programs, 3. 90% Viruses, 7.00 % Network Worms, 89.1 0% Malicious Program Types http://www.securelist.com/en/analysis/151436695/Virus_Review_2002 Portable Media, 1.3 0% Internet, 2. 30% Email, 93.4 0% Main Virus Threat
    9. 9. Safeguards against computer viruses and other malware
    10. 10. Figure 10-5 from pg 388 of your book
    11. 11. Safeguards
    12. 12. Hardware Theft and Vandalism
    13. 13. Software Theft • End-User License Agreement (EULA)
    14. 14. Information Theft (Encryption)
    15. 15. Information Theft (Digital Signature)
    16. 16. System Failure Uninterruptible Power Supply (UPS)
    17. 17. Backing Up – The Ultimate Safeguard
    18. 18. Wireless Security Wireless Access Point (WAP)
    19. 19. 802.11i network
    20. 20. For Next Time • Read the rest of the Computer Security booklet, page 398 to the end (p. 408). Be prepared to take home test.
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