lec10 (1).pdf - Privacy David Wagner What is privacy “the right to be let alone” — Justices Samuel Warren
 and Louis Brandeis control over who

lec10 (1).pdf - Privacy David Wagner What is privacy “the...

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Privacy David Wagner
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What is privacy?
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“the right to be let alone” — Justices Samuel Warren and Louis Brandeis
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control over who can obtain or use information about me
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Fair Information Practices notice, consent (opt-in/opt-out), access
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contextual integrity — Helen Nissenbaum
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This class: informational privacy. What does someone else know about me? What can they infer, from what they know? What choices do I have?
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A worked example: Automated license plate readers
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License plates We're going to look at some data collected by the Oakland Police Department. They have automated license plate readers on their police cars, and they've built up a database of license plates that they've seen -- and where and when they saw each one. Data collection First, we'll gather the data. It turns out the data is publicly available on the Oakland public records site. I downloaded it and combined it into a single CSV file by myself before lecture. Let's start by renaming some columns, and then take a look at it. Phew, that's a lot of data: we can see about 2.7 million license plate reads here. ('red_VRM', 'red_Timestamp', 'Location') Plate Timestamp Location 1275226 01/19/2011 02:06:00 AM (37.798304999999999, -122.27574799999999) 27529C 01/19/2011 02:06:00 AM (37.798304999999999, -122.27574799999999) 1158423 01/19/2011 02:06:00 AM (37.798304999999999, -122.27574799999999) 1273718 01/19/2011 02:06:00 AM (37.798304999999999, -122.27574799999999) 1077682 01/19/2011 02:06:00 AM (37.798304999999999, -122.27574799999999) 1214195 01/19/2011 02:06:00 AM (37.798281000000003, -122.27575299999999) 1062420 01/19/2011 02:06:00 AM (37.79833, -122.27574300000001) 1319726 01/19/2011 02:05:00 AM (37.798475000000003, -122.27571500000001) 1214196 01/19/2011 02:05:00 AM (37.798499999999997, -122.27571) 75227 01/19/2011 02:05:00 AM (37.798596000000003, -122.27569) ... (2742091 rows omitted) lprs = Table.read_table('./all-lprs.csv.gz', compression='gzip', sep=',') lprs.column_labels lprs.relabel('red_VRM', 'Plate') lprs.relabel('red_Timestamp', 'Timestamp') lprs SCRATCH
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Let's start by seeing what can be learned about someone, using this data -- assuming you know their license plate. Stalking Jean Quan As a warmup, we'll take a look at ex-Mayor Jean Quan's car, and where it has been seen. Her license plate number is 6FCH845. (How did I learn that? Turns out she was in the news for getting $1000 of parking tickets, and the news article (- new-mayor-gets-car-booted-3164530.php) included a picture of her car, with the license plate visible. You'd be amazed by what's out there on the Internet...) OK, so her car shows up 6 times in this data set. However, it's hard to make sense of those coordinates. I don't know about you, but I can't read GPS so well.
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  • Fall '09
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