COMPSCI 92L Lecture Notes - Lecture 12: Yik Yak, Onedrive, Proxy Server

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11 May 2016
Spring 2016
Algorithms, Privacy, Programming with APIs, Phishing
Algorithms and programming
Privacy with data
Whisper, an anonymous secret-sharing app, has released information of its users
without their permission
Whisper’s algorithms detect whispers created in your vicinity, and also
suggests images based on text keywords and suggest similar topics
Sees whispers near you, sees whispers like this one, filter whispers like
this one
How can computer scientists look at Whisper and Yik Yak?
Proxy server set up between client and server
Transparent to user, Wifi network
What can be taken down:
Revenge porn: prevented by Microsoft OneDrive, Xbox Live
Copyrighted content
European Union’s transparency report
API - Application Programming Interface
APIs are like fact: are they copyrightable?
Oracle USA vs Google:
Google accused of infringing on Oracle’s database to fuel their Android
Technical and Ethical Concerns of Phishing
Each domain name has its own IP address, but those domains under the same group
have the same prefix.
Ex. Duke websites start with “152.3”
How to know if a site is trustworthy?
Look for security via green lock
Use “” to see source
Ex. whoever owns “” is in Canada and has hidden their
name for privacy concerns
If a website gives you your password back in plain text, then there is potential for
attackers who mask as you to obtain it. Supposed to be a 1-way interaction since
your password is encrypted once you reset it. DIFFERENT FROM RESETTING
Whisper App case study
How does the app provide anonymity, and what is Whisper’s performance based
on its competitors?
Anonymity recently exposed, since Whisper can disclose user’s information
find more resources at
find more resources at
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