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Basics of Computing

Spring Term 2011 Washington College Professor Suydam. Basics of Computing . Week 13 Final Project Preparation & Privacy. Finishing up the JavaScript Dashboard Final Project Preparation Project – ideas Major Components Presentation Evaluation. Agenda – Week 13 . 13- 2.

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Basics of Computing

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  1. Spring Term 2011 Washington College Professor Suydam Basics of Computing Week 13 Final Project Preparation & Privacy

  2. Finishing up the JavaScript Dashboard • Final Project Preparation • Project – ideas • Major Components • Presentation • Evaluation Agenda – Week 13 13-2

  3. Finishing up the JavaScript Dashboard Agenda – Week 13 13-3

  4. Final Project -- Ideas Subject Something you are “passionate” about “Doable” Within time constraints Budget preparation time Project and Presentation are each 10% of total course grade Point of reference: HW5 was 8% 13-4

  5. Final Project -- Major Components Website Components MS Word MS Excel JavaScript or Java Applet Others – student option (e.g., sound, video, etc.), but make relevant to your theme PowerPoint Links Website  PowerPoint 13-5

  6. Final Project -- Presentation Contents What ~1/3 How ~2/3 Be animated Show interest/enthusiasm Smile Rehearse Timing 13-6

  7. Final Project -- IDEAS 13-7

  8. Final Project -- Evaluation 13-8

  9. What is privacy? Examine a transaction of buying Dating for Total Dummies • Information linking the purchase with the customer How can the information be used? • Book merchant collecting information is ordinary business practice • Book merchant sending advertisements to customer is ordinary business practice • What about merchant selling information to other businesses? Modern devices make it possible to violate people's privacy without their knowledge In 1890, Brandeis wrote that individuals deserve "sufficient safeguards against improper circulation" of their images Privacy: Whose Information Is It? 13-9

  10. Spectrum of control spans four main possibilities: • No uses. Information should be deleted when the store is finished with it • Approval or Opt-in. Store can use it for other purposes with customer's approval • Objection or Opt-out. Store can use it for other purposes if customer does not object • No limits. Information can be used any way the store chooses • Fifth possibility is internal use -- store can use information to continue conducting business with you Controlling the Use of Information 13-10

  11. Privacy: The right of people to choose freely under what circumstances and to what extent they will reveal themselves, their attitude, and their behavior to others Threats to Privacy: Government and business Voluntary Disclosure: We choose to reveal information in return for real benefits (doctor, credit card company) A Privacy Definition 13-11

  12. OECD (Organization of Economic Cooperation and Development) in 1980 developed the standard eight-point list of privacy principles. • Limited Collection Principle • Quality Principle • Purpose Principle • Use Limitation Principle • Security Principle • Openness Principle • Participation Principle • Accountability Principle Fair Information Practices 13-12

  13. U.S. has not adopted OECD principles China does not protect privacy European Union has European Data Protection Directive (OECD principles) EU Directive requires data on EU citizens to be protected at same standard even when it leaves their country Comparing Privacy Across the Atlantic 13-13

  14. Privacy Act of 1974 covers interaction with government • Interactions with business: • Electronic Communication Privacy Act of 1986 • Video Privacy Protection Act of 1988 • Telephone Consumer Protection Act of 1991 • Driver's Privacy Protection Act of 1994 • These all deal with specific business sectors—not an omnibus solution US Laws Protecting Privacy 13-14

  15. Two points of disagreement between FTC (US) and OECD (Europe): • Opt-in/Opt-out • When can an organization use information it collects for one purpose, for a different purpose? • Opt-out is US standard except for highly sensitive data; Opt-in is European standard • Compliance/Enforcement -- US has "voluntary compliance," EU has offices to control data Privacy Principles: European Union 13-15

  16. Do-Not-Call List • Telemarketing industry's "self-policing" mechanism required individuals to write a letter or make an on-line payment to stop telemarketing calls • US government set up Do Not Call List. 80,000,000 households are on the list and telemarketing industry has largely collapsed The Do-Not-Call registry does not prevent all unwanted calls. It does not cover the following: • calls from organizations with which you have established a business relationship; • calls for which you have given prior written permission; • calls which are not commercial or do not include unsolicited advertisements; • calls by or on behalf of tax-exempt non-profit organizations. A Privacy Success Story 13-16

  17. Cookie: Record containing seven fields of information that uniquely identify a customer's session on a website. Cookie is stored on customer's hard drive. • Abuse: Third party cookie • Third party advertisers on web site enter client/server relationship with customer as page loads • Advertiser can set cookies, and can access cookies when user views other websites that advertiser uses • Browser options: • Turn off cookies • Ask each time a server wants to set a cookie • Accept all cookies The Cookie Monster 13-17

  18. Americans do not enjoy Security Principle Identity theft is the crime of posing as someone else for fraudulent purposes -- using information about person like credit card numbers, social security numbers Identity Theft 13-18

  19. Purchase up-to-date virus checking software Adjust your cookie preferences to match your comfort level Read the privacy statement of any website you give information to Review protections against phishing scams Patronize reputable companies for music, software, etc. Be skeptical Stay familiar with current assaults on privacy Managing Your Privacy 13-19

  20. Encryption Terminology • Encryption: Transform representation so it is no longer understandable • Cryptosystem: A combination of encryption and decryption methods • Cleartext or Plaintext: Information before encryption • Cipher text: Information in encrypted form • One-way cipher: Encryption system that cannot be easily reversed (used for passwords) • Decryption: Reversing encryption process Encryption And Decryption 13-20

  21. Encrypting a message 13-21

  22. Longer text is easier to decode • Notice what bit sequences show up frequently • Knowledge of most frequent letters in the “cleartext” language Smarter byte-for-byte substitutions • Group more than two bytes • Be sure not to exchange the key over unsecured connection Breaking the Code 13-22

  23. RSA is an Internet encryption and authentication system that uses an algorithm developed in 1977 by Ron Rivest, Adi Shamir, and Leonard Adleman. The RSA algorithm is the most commonly used encryption and authentication algorithm and is included as part of the Web browsers from Microsoft and Netscape. The algorithm involves multiplying two large prime numbers (a prime number is a number divisible only by that number and 1) and through additional operations deriving a set of two numbers that constitutes the public key and another set that is the private key. Summarizing the RSA System* 13-23 *Source: http://searchsecurity.techtarget.com/sDefinition/0,,sid14_gci214273,00.html

  24. Keep a full copy of everything written on the system as of some date and time—full backup • Create partial backups—copies of changes since last full backup • After disaster, start by installing the last full backup copy • Re-create state of system by making changes stored in partial backups, in order • All data since last backup (full or partial) will be lost A Fault Recovery Program for Business 13-24

  25. How and What to Back Up • You can manually backup or get automatic backup software that writes to an external drive (e.g., flash memory stick, writeable CD, iPod, Time Capsule) • For manual backups, you do not have to backup data that: • can be re-created from some permanent source, like software • was saved before, but has not changed • you don’t care about Recovering Deleted Information • Backups also protect from accidental deletions • Can save evidence of crime or other inappropriate behavior • Remember that two copies of email are produced when sender hits send—one in sent mail file and one somewhere else, which the sender probably can't delete Backing Up a Personal Computer 13-25

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