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Chapter 8 - Privacy

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10 Terms
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Digital footprint
information about a person on the Internet as a result of their online activity Found in Lecture 8 - Privacy
Metadata
a set of data that describes and gives information about other data Found in zyBooks Section 8.1
strategies to protect user information
- choose apps used carefully (How much does the app collect and record information? How does the app use the collected data?) - think before posting (Could the information you are posting harm yourself if made public?) - get the facts (Before signing up for a "free" service, consider how the service makes money) - check and set preferences carefully (If you don't check/set user preferences, default may be to "share") Found in Lecture 8 - Privacy
An employer might NOT hire a candidate if employer sees the candidate...
- posts inappropriate photographs (46% of companies said yes) - posts about drinking/using drugs (41% of companies said yes) - posts with poor communication skills (32% of companies said yes) NOTE: 40+% percent of employers use social-media and search engines to research job candidates Found in Lecture 8 - Privacy and zyBooks Section 8.7
Authentication
is the process of verifying that you really are the person who has the right to access a given computer. Managed by the OS. Generally handled by user ID and password sometimes expanded to include a security question (e.g., mother's maiden name) some really secure systems will use biometrics data as well (fingerprints) Found in Lecture 8 - Privacy
How does OS protect passwords?
OS encrypts a password for a given user, converting it into a representation that cannot be understood without the appropriate algorithm. Typically password encryption uses a HASH function. Found in Lecture 8 - Privacy
Encryption
How the OS protects passwords Analogy: sending a letter written in a secret language Found in Lecture 8 - Privacy and zyBooks Section 8.4
Hashing
Applying a mathematical one-way function to create a "signature" of the input. Different inputs can resolve to the same hash. Found in Lecture 8 - Privacy
One-way function
Can easily do function one way ... but really HARD to go the other way. Consider two LARGE prime numbers (say i and j) - I can multiple the two prime numbers easily - I can NOT tell you the prime factorization very easily Found in Lecture 8 - Privacy
Protocol
A mutually agreed-upon set of rules, conventions, and agreements for the efficient and orderly exchange of information Found in zyBooks Section 8.4