Privacy and Security in Online Social Media : OSM APIs and tools for data collections

1. Privacy and Security in Online
Social Media
Course on NPTEL
NOC-CS07
Week 2.1
Ponnurangam Kumaraguru (“PK”)
Associate Professor
ACM Distinguished Speaker
fb/ponnurangam.kumaraguru, @ponguru

2. Online discussion
⚫https://onlinecourses.nptel.ac.in/noc16_cs0
7/forum
⚫Please participate
⚫Read the posts before asking any questions
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3. Assignment 1
⚫Hope it was simple and all of you were able
to do it satisfactorily
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4. 4

5. 5

6. 4 / 5 V’s of Online
Social Media
6
V

7. 7

8. 8

9. 9

10. Other implications
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11. Tutorials online
⚫Linux
⚫Python
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12. Frameworks / Platforms to know
⚫APIs of OSM (e.g. Facebook / Twitter API)
⚫A programming language to write code to
extract data (e.g. Python / RoR)
⚫A database to store data (e.g. MySQL /
MongoDB)
⚫A visualization tool to query and analyze data
(e.g. PhpMyAdmin / RoboMongo)
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13. Application Programming Interface (API)
⚫OSM API enables developers to interact with
the OSM website programmatically
⚫We use APIs to extract data from Twitter,
Facebook, etc.
⚫Rate limit: How much data requests can we
make?
⚫Each OSM has its own API and API rate limits
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14. Programming
language:
⚫High level programming language to instruct
commands and facilitate data collection
⚫Supports libraries for reading urls, parse
data, interact with APIs, etc.
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15. Data format
⚫API returns data in the following two
formats:
-JSON
-XML
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16. JSON
⚫JSON - JavaScript Object Notation
⚫Data structuring notation
⚫Sample:
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17. JSON
17
⚫Viewing

18. 18
⚫Relational Database to store data
⚫Data is stored in rows and columns
⚫Retrieve using SQL queries
⚫Sample:

19. MongoDB
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20. PhpMyAdmin
⚫Access MySQL databases and query using
browser
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SQL to query
databases

21. 21
RoboMongo

22. RoboMongo
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23. All content in graph form
⚫Graph API
-Interface to extract data related to User profiles,
activities, photos, pages, applications, etc.
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USER
Uploads
Friend
Friend
Uploads
Likes /
comments
Uploads

24. Why is it called the Graph
API
⚫All objects are stored as nodes of a “graph”
⚫Connections (likes, friendship etc.) are edges
⚫All nodes have a unique numeric ID
-Users
-Pages
-Posts
-…
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25. Tutorials for this week
⚫Facebook API
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26. Thank you
pk@iiitd.ac.in
precog.iiitd.edu.in
fb/ponnurangam.kumaraguru