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21-COGS3-Network Safety

21-COGS3-Network Safety - NETWORK SAFETY Mary ET Boyle Ph.D...

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NETWORK SAFETY Mary ET Boyle, Ph.D. Department of Cognitive Science, UCSD
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Security Definition: The quality or state of being free from danger Security Hole – weakness/vulnerability – a state that can be exploited for an attack.
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Insiders v. Outsiders Insider Attack Overt • Disgruntled employees Data or equipment destruction Covert Because of knowledge they can wreak havoc – criminal actions Unintended Neglect duties or input wrong data etc
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Outsiders Overt • Physical attacks on computer and network facilities. • Denial of Service (DoS) Covert • Usually software sent from the outside to infect a facility Unintended • Rare
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Denial of Service “You may have heard about "cyber warfare" in the news, but do you really know what it is? This book provides fascinating and disturbing details on how nations, groups, and individuals throughout the world are using the Internet as an attack platform to gain military, political, and economic advantages over their adversaries. You'll learn how sophisticated hackers working on behalf of states or organized crime patiently play a high- stakes game that could target anyone, regardless of affiliation or nationality.” Editorial Review – Amazon.com
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Ten Immutable Laws of Security • If someone can persuade you to run their program on your computer, it is not your computer anymore. 1. • If someone can alter the operating system on your computer it is not your computer anymore 2. • If someone has unrestricted physical access to your computer, it is not your computer anymore 3. • If you allow someone to upload programs to your website, it is not your computer anymore. 4. • Weak passwords defeat strong security. 5. http://technet.microsoft.com/en-us/library/cc722487.aspx
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A computer is only as secure as its owner/user is trustworthy 6. Encrypted data is only as secure as the decryption key. 7. An out-of-date-virus scanner is only marginally better than none at all. 8. Absolute anonymity is not practical, in real life or on the Web 9.
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