The document discusses how multimedia content posted online can reveal private location information through geo-tagging and other metadata, even when location services are disabled. It provides three case studies where researchers were able to infer home addresses, school locations, and vacation spots of individuals by analyzing photos and videos posted to Twitter, Craigslist, and YouTube. The studies show that people often underestimate how much personal information they disclose through multimedia sharing sites. Ongoing research aims to develop techniques that can estimate the location of media based on visual, audio and text clues in order to protect user privacy.
Re-use as Impact: Linking the open and impact agendasCameron Neylon
Talk given as part of an ESRC program on Research Impact. I argue that using the frame that impact can be measured in the form of various types of re-use and that this helps us to address the apparently contradiction of maximising the impact of curiosity driven and applied research.
This is a lecture I gave to undergraduates and Masters students at the Communication Design School at Texas State University. Thank you to Jill Fantauzza for the invitation!
Describes the zen-inspired approach to presentation development outlined in Garr Reynolds' excellent book. Created to accompany a workshop for faculty at the University of Notre Dame.
Re-use as Impact: Linking the open and impact agendasCameron Neylon
Talk given as part of an ESRC program on Research Impact. I argue that using the frame that impact can be measured in the form of various types of re-use and that this helps us to address the apparently contradiction of maximising the impact of curiosity driven and applied research.
This is a lecture I gave to undergraduates and Masters students at the Communication Design School at Texas State University. Thank you to Jill Fantauzza for the invitation!
Describes the zen-inspired approach to presentation development outlined in Garr Reynolds' excellent book. Created to accompany a workshop for faculty at the University of Notre Dame.
Trends 2013 , Mobiele revolutie, Cloud en Tesla presentatie Vincent Everts
Hoe bedienen we de klant van morgen? Hoe gebruiken we intern social media, video en maken we van de klant een ambassadeur. Hoe verdwijnt 80% van de rol van de PC in de komende 5 jaar? En hoe is electrisch rijden, smart grid en solar energie een voorbeeld van de grootschalige transformaties die plaats gaan vinden?
Gepresenteerd tijdens de RESSoftware relatie event
3D Printing Is Just the Beginning: The Future of Makerspaces in Academic Libr...Lisa Kurt
The maker movement is growing across the country and world. With interactive, participatory events and growing local communities, we've seen a shift. Individuals, professionals, and hobbyists from areas such as engineering, design, science, art, and more are coming together with one common thread: the desire to make.
Public libraries were the first on the scene to take notice and respond, but now we're beginning to see academic libraries recognize this untapped potential for their own communities. This emerging learning trend holds the promise of enormous change, bringing many researchers and students together from across disciplines in a truly collaborative way. This movement is about more than just the purchase of expensive equipment; it involves engagement, outreach, and knowledge about what drives the academic community. The academic environment is shifting toward content creation in a variety of forms, in turn reshaping learning, curriculums, and research across the board. In order for libraries to continue to support the research and learning needs of their institutions, it is critical to go beyond traditional library materials, to understand what new resources and technologies the library can support for all on campus to use.
3D Printing Is Just the Beginning: The Future of Makerspaces within Academic ...Patrick "Tod" Colegrove
ACRL webcast, co-presented with Lisa Kurt.
http://www.ala.org/acrl/makerspaces
Description: The maker movement is growing across the country and world. With interactive, participatory events and growing local communities, we've seen a shift. Individuals, professionals, and hobbyists from areas such as engineering, design, science, art, and more are coming together with one common thread: the desire to make.
Public libraries were the first on the scene to take notice and respond, but now we're beginning to see academic libraries recognize this untapped potential for their own communities. This emerging learning trend holds the promise of enormous change, bringing many researchers and students together from across disciplines in a truly collaborative way. This movement is about more than just the purchase of expensive equipment; it involves engagement, outreach, and knowledge about what drives the academic community. The academic environment is shifting toward content creation in a variety of forms, in turn reshaping learning, curricula, and research across the board. In order for libraries to continue to support the research and learning needs of their institutions, it is critical to go beyond traditional library materials, to understand what new resources and technologies the library can support for all on campus to use.
John Blue - Farmers, Ranchers, Social Media: Where are they and how do I find...John Blue
Farmers, Ranchers, Social Media: Where are they and how do I find them? - John Blue. From the 2012 eXtension National Conference, Oct 2, 2012, Oklahoma City, OK, USA.
https://learn.extension.org/conferences/nexc2012/events/688
Presented at the AERA 2013 session “How Augmenting Reality with Mobile Devices Helps Students Learn Academic Content”
Authors: John Martin, David Gagnon, Kurt Squire, (University of Wisconsin–Madison), Chris Holden (University of New Mexico), Seann Dikkers (Ohio University)
Presented by Ma’ayan Plaut, Social Media Coordinator at Oberlin College, and Mallory Wood, Director of Marketing at mStoner, on Monday at 4:15 PM in the Marketing, Content, and Social Strategy Track at HighEdWeb 2012.
Do you manage your institution’s social media presence? Ever wished you could clone yourself in order to get through your to-do list? Have you even considered stealing Hermione’s Time-Turner necklace? If so, this session is for you.
Managing social media can be a very time consuming process if you don’t have the right strategies in place. For many marketers, admission counselors and alumni-relations officers, the management of department or institutional social media properties is an add-on to an already full plate. We’ll show you that you don’t have to add hours to your day to effectively manage your new social media responsibilities.
Sharing case studies and best practices from the industry, this session will help you increase your day-to-day efficiency, develop a social media content strategy at your institution and determine which tools to focus on based on your goals and resources.
Reach for the Stars Using Media in Your ClassroomWesley Fryer
These are slides for the keynote address, "Reach for the Stars Using Media in Your Classroom," shared by Wesley Fryer on September 28, 2011, in Concord, New Hampshire. This presentation was shared for a gathering celebrating the 30th anniversary of NHSTE (New Hampshire's Affiliate of the International Society for Technology in Education) at the McAuliffe-Shepard Discovery Center in Concord. The presentation focuses on our obligations to be multimedia communicators as educators, the basics of "Playing with Media," and examples of outstanding student media projects from New Hampshire students. Amidst a continuing barrage of exciting new technologies like the Apple iPad, Amazon Fire and Google Chromebook, the right question to ask is NOT, "Should we buy X device for our students?" The right question to ask is, "What do we want our students to DO with the tool we buy?"
Engineer Whispering - the secrets of working with technologistsKate Matsudaira
When a team really comes together, the whole truly outweighs the sum of its parts, producing a synergy that unquestionably leads to innovation and inspiration. And while true that individuals can and do build great products, it’s only well-tuned teams that are capable of building sustainable excellence.
Software-based products present an interesting challenge to the team dynamic - collaborating and connecting with technical folks can be challenging and downright frustrating; one is from Mars and the other is from Venus. Thankfully there are many people who have successfully navigated these treacherous waters. This talk will present the distilled wisdom, anecdotes and suggestions from hundreds of industry leaders, in order to illustrate the good, the bad and the ugly of team-oriented software product development. The audience will come away with great ideas and helpful tips as to how to more effectively communicate with and relate to the more technical elements of their teams.
Slides for a lightning talk sponsored by the University of Michigan Libraries for Open Access Week 2012. Blogpost here: http://etechlib.wordpress.com/2012/10/19/introducing-protei/
More Related Content
Similar to How Your Facebook Update Could Make You a Victim of Crime : On the Privacy Implications of Multimedia Retrieval
Trends 2013 , Mobiele revolutie, Cloud en Tesla presentatie Vincent Everts
Hoe bedienen we de klant van morgen? Hoe gebruiken we intern social media, video en maken we van de klant een ambassadeur. Hoe verdwijnt 80% van de rol van de PC in de komende 5 jaar? En hoe is electrisch rijden, smart grid en solar energie een voorbeeld van de grootschalige transformaties die plaats gaan vinden?
Gepresenteerd tijdens de RESSoftware relatie event
3D Printing Is Just the Beginning: The Future of Makerspaces in Academic Libr...Lisa Kurt
The maker movement is growing across the country and world. With interactive, participatory events and growing local communities, we've seen a shift. Individuals, professionals, and hobbyists from areas such as engineering, design, science, art, and more are coming together with one common thread: the desire to make.
Public libraries were the first on the scene to take notice and respond, but now we're beginning to see academic libraries recognize this untapped potential for their own communities. This emerging learning trend holds the promise of enormous change, bringing many researchers and students together from across disciplines in a truly collaborative way. This movement is about more than just the purchase of expensive equipment; it involves engagement, outreach, and knowledge about what drives the academic community. The academic environment is shifting toward content creation in a variety of forms, in turn reshaping learning, curriculums, and research across the board. In order for libraries to continue to support the research and learning needs of their institutions, it is critical to go beyond traditional library materials, to understand what new resources and technologies the library can support for all on campus to use.
3D Printing Is Just the Beginning: The Future of Makerspaces within Academic ...Patrick "Tod" Colegrove
ACRL webcast, co-presented with Lisa Kurt.
http://www.ala.org/acrl/makerspaces
Description: The maker movement is growing across the country and world. With interactive, participatory events and growing local communities, we've seen a shift. Individuals, professionals, and hobbyists from areas such as engineering, design, science, art, and more are coming together with one common thread: the desire to make.
Public libraries were the first on the scene to take notice and respond, but now we're beginning to see academic libraries recognize this untapped potential for their own communities. This emerging learning trend holds the promise of enormous change, bringing many researchers and students together from across disciplines in a truly collaborative way. This movement is about more than just the purchase of expensive equipment; it involves engagement, outreach, and knowledge about what drives the academic community. The academic environment is shifting toward content creation in a variety of forms, in turn reshaping learning, curricula, and research across the board. In order for libraries to continue to support the research and learning needs of their institutions, it is critical to go beyond traditional library materials, to understand what new resources and technologies the library can support for all on campus to use.
John Blue - Farmers, Ranchers, Social Media: Where are they and how do I find...John Blue
Farmers, Ranchers, Social Media: Where are they and how do I find them? - John Blue. From the 2012 eXtension National Conference, Oct 2, 2012, Oklahoma City, OK, USA.
https://learn.extension.org/conferences/nexc2012/events/688
Presented at the AERA 2013 session “How Augmenting Reality with Mobile Devices Helps Students Learn Academic Content”
Authors: John Martin, David Gagnon, Kurt Squire, (University of Wisconsin–Madison), Chris Holden (University of New Mexico), Seann Dikkers (Ohio University)
Presented by Ma’ayan Plaut, Social Media Coordinator at Oberlin College, and Mallory Wood, Director of Marketing at mStoner, on Monday at 4:15 PM in the Marketing, Content, and Social Strategy Track at HighEdWeb 2012.
Do you manage your institution’s social media presence? Ever wished you could clone yourself in order to get through your to-do list? Have you even considered stealing Hermione’s Time-Turner necklace? If so, this session is for you.
Managing social media can be a very time consuming process if you don’t have the right strategies in place. For many marketers, admission counselors and alumni-relations officers, the management of department or institutional social media properties is an add-on to an already full plate. We’ll show you that you don’t have to add hours to your day to effectively manage your new social media responsibilities.
Sharing case studies and best practices from the industry, this session will help you increase your day-to-day efficiency, develop a social media content strategy at your institution and determine which tools to focus on based on your goals and resources.
Reach for the Stars Using Media in Your ClassroomWesley Fryer
These are slides for the keynote address, "Reach for the Stars Using Media in Your Classroom," shared by Wesley Fryer on September 28, 2011, in Concord, New Hampshire. This presentation was shared for a gathering celebrating the 30th anniversary of NHSTE (New Hampshire's Affiliate of the International Society for Technology in Education) at the McAuliffe-Shepard Discovery Center in Concord. The presentation focuses on our obligations to be multimedia communicators as educators, the basics of "Playing with Media," and examples of outstanding student media projects from New Hampshire students. Amidst a continuing barrage of exciting new technologies like the Apple iPad, Amazon Fire and Google Chromebook, the right question to ask is NOT, "Should we buy X device for our students?" The right question to ask is, "What do we want our students to DO with the tool we buy?"
Engineer Whispering - the secrets of working with technologistsKate Matsudaira
When a team really comes together, the whole truly outweighs the sum of its parts, producing a synergy that unquestionably leads to innovation and inspiration. And while true that individuals can and do build great products, it’s only well-tuned teams that are capable of building sustainable excellence.
Software-based products present an interesting challenge to the team dynamic - collaborating and connecting with technical folks can be challenging and downright frustrating; one is from Mars and the other is from Venus. Thankfully there are many people who have successfully navigated these treacherous waters. This talk will present the distilled wisdom, anecdotes and suggestions from hundreds of industry leaders, in order to illustrate the good, the bad and the ugly of team-oriented software product development. The audience will come away with great ideas and helpful tips as to how to more effectively communicate with and relate to the more technical elements of their teams.
Slides for a lightning talk sponsored by the University of Michigan Libraries for Open Access Week 2012. Blogpost here: http://etechlib.wordpress.com/2012/10/19/introducing-protei/
Similar to How Your Facebook Update Could Make You a Victim of Crime : On the Privacy Implications of Multimedia Retrieval (16)
Introducing PROTEI, a model of transparency & privacy dynamics influencing co...
How Your Facebook Update Could Make You a Victim of Crime : On the Privacy Implications of Multimedia Retrieval
1. How Your Facebook Update Could
Make You a Victim of Crime
: On the Privacy Implications of Multimedia
Retrieval
International Computer Science Institute
Jaeyoung Choi
jaeyoung@icsi.berkeley.edu
UC Berkeley KGSA Talk & Seminar - Oct 16, 2012
Monday, October 29, 12
4. Phillip Markoff
• Boston University medical
student
Monday, October 29, 12
5. Phillip Markoff
• Boston University medical
student
• ‘Craigslist Killer’
- He found his victims through the ads
on Craigslist
Monday, October 29, 12
6. Phillip Markoff
• Boston University medical
student
• ‘Craigslist Killer’
- He found his victims through the ads
on Craigslist
Monday, October 29, 12
7. Phillip Markoff
• Boston University medical
student
• ‘Craigslist Killer’
- He found his victims through the ads
on Craigslist
Monday, October 29, 12
8. Phillip Markoff
• Boston University medical
student
• ‘Craigslist Killer’
- He found his victims through the ads
on Craigslist
Monday, October 29, 12
25. Geo-Tagging : Benefits
Allows easier clustering of photo and video
series as well as additional services.
10
Monday, October 29, 12
26. • OK.. can you do real harm with Geo-tags??
Monday, October 29, 12
27. Doing Real Harm with Geo-Tag
G. Friedland and R. Sommer: "Cybercasing the Joint: On the Privacy
Implications of Geotagging", Proceedings of the Fifth USENIX Workshop
on Hot Topics in Security (HotSec 10), Washington, D.C, August 2010. 12
Monday, October 29, 12
28. Doing Real Harm with Geo-Tag
• Cybercasing: Using online (location-based) data and
services to enable real-world attacks.
G. Friedland and R. Sommer: "Cybercasing the Joint: On the Privacy
Implications of Geotagging", Proceedings of the Fifth USENIX Workshop
on Hot Topics in Security (HotSec 10), Washington, D.C, August 2010. 12
Monday, October 29, 12
29. Doing Real Harm with Geo-Tag
• Cybercasing: Using online (location-based) data and
services to enable real-world attacks.
• Three Case Studies:
G. Friedland and R. Sommer: "Cybercasing the Joint: On the Privacy
Implications of Geotagging", Proceedings of the Fifth USENIX Workshop
on Hot Topics in Security (HotSec 10), Washington, D.C, August 2010. 12
Monday, October 29, 12
30. Doing Real Harm with Geo-Tag
• Cybercasing: Using online (location-based) data and
services to enable real-world attacks.
• Three Case Studies:
G. Friedland and R. Sommer: "Cybercasing the Joint: On the Privacy
Implications of Geotagging", Proceedings of the Fifth USENIX Workshop
on Hot Topics in Security (HotSec 10), Washington, D.C, August 2010. 12
Monday, October 29, 12
32. Case Study 1: Twitter
•Pictures in Tweets can be geo-tagged
13
Monday, October 29, 12
33. Case Study 1: Twitter
•Pictures in Tweets can be geo-tagged
13
Monday, October 29, 12
34. Case Study 1: Twitter
•Pictures in Tweets can be geo-tagged
•From a technically-savvy celebrity we
found:
13
Monday, October 29, 12
35. Case Study 1: Twitter
•Pictures in Tweets can be geo-tagged
•From a technically-savvy celebrity we
found:
–Home location (several pics)
13
Monday, October 29, 12
36. Case Study 1: Twitter
•Pictures in Tweets can be geo-tagged
•From a technically-savvy celebrity we
found:
–Home location (several pics)
–Where the kids go to school
13
Monday, October 29, 12
37. Case Study 1: Twitter
•Pictures in Tweets can be geo-tagged
•From a technically-savvy celebrity we
found:
–Home location (several pics)
–Where the kids go to school
–The place where he/she walks the dog
13
Monday, October 29, 12
38. Case Study 1: Twitter
•Pictures in Tweets can be geo-tagged
•From a technically-savvy celebrity we
found:
–Home location (several pics)
–Where the kids go to school
–The place where he/she walks the dog
–“Secret” office
13
Monday, October 29, 12
39. Case Study 1: Twitter
•Pictures in Tweets can be geo-tagged
•From a technically-savvy celebrity we
found:
–Home location (several pics)
–Where the kids go to school
–The place where he/she walks the dog
–“Secret” office
13
Monday, October 29, 12
40. Case Study 1: Twitter
•Pictures in Tweets can be geo-tagged
•From a technically-savvy celebrity we
found:
–Home location (several pics)
–Where the kids go to school
–The place where he/she walks the dog
–“Secret” office
13
Monday, October 29, 12
41. Celebs unaware of Geo-
Tagging
Source: ABC News 14
Monday, October 29, 12
42. Celebs unaware of Geo-
Tagging
Source: ABC News 14
Monday, October 29, 12
45. Case Study 2: Craigslist
“For Sale” section of Bay Area Craigslist.com:
In 4 days:
• 68729 pictures total
• 1.3% geo-tagged
17
Monday, October 29, 12
47. People are Unaware of Geo-
Tagging
•Many ads with geo-location otherwise
anonymized
18
Monday, October 29, 12
48. People are Unaware of Geo-
Tagging
•Many ads with geo-location otherwise
anonymized
•Sometimes selling high-valued goods, e.g.
cars, diamonds
18
Monday, October 29, 12
49. People are Unaware of Geo-
Tagging
•Many ads with geo-location otherwise
anonymized
•Sometimes selling high-valued goods, e.g.
cars, diamonds
•Sometimes “call Sunday after 6pm”
18
Monday, October 29, 12
50. People are Unaware of Geo-
Tagging
•Many ads with geo-location otherwise
anonymized
•Sometimes selling high-valued goods, e.g.
cars, diamonds
•Sometimes “call Sunday after 6pm”
•Multiple photos allow interpolation of
coordinates for higher accuracy
18
Monday, October 29, 12
53. Geo-Tagging Resolution
iPhone 3G picture Google Street View
gure 1: 1: Photo a bike taken with an an iPhone 3G and corresponding Google Street View image based onon the stor
Figure Photo of of a bike taken with iPhone 3G and a a corresponding Google Street View image based the stored
ordinates. The accuracy of thethe camera location (marked) front of the garage is about +/−1 m. Many classified advertise
coordinates. The accuracy of camera location (marked) in in front of the garage is about +/−1 m. Many classified advert
Measured accuracy: +/- 1m
es contain photos describing objects forfor sale taken home that automatically contain geo-tagging.
sites contain photos describing objects sale taken at at home that automatically contain geo-tagging.
n would make it easy to to increase the confidence in the in in the second step identifying all other videos fr
tion would make it easy increase the confidence in the the second step identifying all other videos from
20
resultsOctober 29, 12
further.
ults further.
Monday,
corresponding users. 106 ofof these turned out to hav
corresponding users. 106 these turned out to have
56. Case Study 3: YouTube
Recall:
22
Monday, October 29, 12
57. Case Study 3: YouTube
Recall:
• Once data is published, the Internet keeps
it (in potentially many copies).
22
Monday, October 29, 12
58. Case Study 3: YouTube
Recall:
• Once data is published, the Internet keeps
it (in potentially many copies).
• APIs are easy to use and allow quick
retrieval of large amounts of data
22
Monday, October 29, 12
59. Case Study 3: YouTube
Recall:
• Once data is published, the Internet keeps
it (in potentially many copies).
• APIs are easy to use and allow quick
retrieval of large amounts of data
Can we find people on vacation in YouTube?
22
Monday, October 29, 12
60. Cybercasing on YouTube
Experiment: Cybercasing using the YouTube
API (240 lines in Python)
Location
Radius Query
Keywords
Results
Users? Query
YouTube
Results
Time-Frame
Distance
Filter
Cybercasing
23
Candidates
Monday, October 29, 12
69. • What if I turn off geo-tagging feature?
Monday, October 29, 12
70. Ongoing Work:
http://mmle.icsi.berkeley.edu
27
Monday, October 29, 12
71. Multimodal Location Estimation
We infer location of a media (video/photo/
document) based on visual, audio, and tags:
•Use geo-tagged data as training data
•Allows faster search, inference, and
intelligence gathering even without GPS.
28
Monday, October 29, 12
72. http://www.multimediaeval.org/
Mediaeval Placing Task
- An annual benchmark which provides standardized
datasets to the community of researchers for the
evaluation of new algorithms
Monday, October 29, 12
73. Overview of Our Approach
{berkeley,
sathergate,
{berkeley,
haas}
campanile}
Edge:
Correlated
loca7ons
(e.g.
common
tag,
visual,
acous7c
feature) Node:
Geoloca7on
of
video
k p(xj |{tk })
p(xi |{ti }) j
p(xi , xj |{tk }
i {tk })
j
{campanile} {campanile,
haas}
Edge
Poten,al:
Strength
of
an
edge,
(e.g.
posterior
distribu5on
of
loca5ons
given
common
tags)
J. Choi, G. Friedland, V. Ekambaram, K. Ramchandran: "Multimodal Location Estimation of Consumer Media: 30
Dealing with Sparse Training Data," in Proceedings of IEEE ICME 2012, Melbourne, Australia, July 2012.
Monday, October 29, 12
74. Results: MediaEval
J. Choi, G. Friedland, V. Ekambaram, K. Ramchandran: "The 2012 ICSI/Berkeley
Video Location Estimation System," in Proceedings of MediaEval 2012, Pisa, Italy,
October 2012.
Monday, October 29, 12
75. YouTube Cybercasing
Revisited
Old Experiment No Geotags
Initial Videos 1000 (max) 107
User Hull ~50k ~2000
Potential Hits 106 112
Actual Targets >12 >12
Even without Geo-Tags, cybercasing on
YouTube video is readily possible
G. Friedland, and J. Choi, “Semantic Computing and Privacy: a Case Study Using
Inferred Geo-Location.” in Int. J. Semantic Computing, Vol. 5, Nr. 1 (2011) , p. 32
79-93.
Monday, October 29, 12
80. Example
Idea: Can one link videos across acounts?
34
Monday, October 29, 12
81. Example
Idea: Can one link videos across acounts?
(e.g. YouTube linked to Facebook vs
anonymized dating site)
34
Monday, October 29, 12
82. Persona Linking using Internet
Videos
Speaker Recognition System
- Given a voice sample, it tells whether it’s from Howard, Gerald, Jae, etc..
City Identification System
- Modified from the traditional Speaker Recognition System
- Given an audio sample, it tells whether it’s from Seoul, San Francisco, Berlin, etc..
Monday, October 29, 12
83. Experiment
- 4869 test videos from Flickr
- 500 users in training,
493 hits, 2289 non-hits in test
-Audio characteristics :
“wild” (70% heavy noise, 50%
speech )
H. Lei, J. Choi, A. Janin, and G. Friedland: “Persona Linking: Matching Uploaders of
Videos Accross Accounts”, at IEEE International Conference on Acoustic, Speech, and
Signal Processing (ICASSP), Prague, May 2011
Monday, October 29, 12
84. User ID on Flickr videos
Even with a preliminary
experiment setting, the system
performs much better than
random.
(26.3% < 50% Equal Error Rate)
Monday, October 29, 12
85. Linkage Attacks on SNS
• There are methods to link a user’s accounts only by
accessing publicly available data.
• Your anonymity across different social networking
services accounts can be compromised.
Monday, October 29, 12
86. Linkage Attacks
• Multiple accounts on social networks
• Same or different purposes : reviewing ...
• What about the aggregate trace they leave
?
2
Works and slides credit: Oana Goga (http://www-npa.lip6.fr/~goga/)
Monday, October 29, 12
87. De-anonymization Model
?
im ilar
o ws
h
Targeted account
(YELP users are id’d)
Candidate list
7
Works and slides credit: Oana Goga (http://www-npa.lip6.fr/~goga/)
Monday, October 29, 12
88. Where a user is posting
- Twitter locations
- Yelp locations
5
Works and slides credit: Oana Goga (http://www-npa.lip6.fr/~goga/)
Monday, October 29, 12
89. When a user is posting
6
Works and slides credit: Oana Goga (http://www-npa.lip6.fr/~goga/)
Monday, October 29, 12
90. Performance of matching with
location profile
1
Yelp − Twitter 35% of Flickr Flickr and 60%
40% of and Yelp
Flickr − Twitter
accountsYelp accounts can
of can be matched
0.8 to a set of 250 Twitter set of
be matched to a
•x
accounts Twitter accounts
1000
CDF users
0.6
0.4
0.2
0
10 100 250 1000 10000
Rank of the ground truth user
11
Works and slides credit: Oana Goga (http://www-npa.lip6.fr/~goga/)
Monday, October 29, 12
92. Problems Reformulated
• Many applications are encouraging sharing data
heavily and users follow
Monday, October 29, 12
93. Problems Reformulated
• Many applications are encouraging sharing data
heavily and users follow
• Multimedia isn’t only a lot of data, it’s also a lot
of information
Monday, October 29, 12
94. Problems Reformulated
• Many applications are encouraging sharing data
heavily and users follow
• Multimedia isn’t only a lot of data, it’s also a lot
of information
• Users and engineers often unaware of (hidden)
retrieval possibilities of shared (multimedia) data
Monday, October 29, 12
95. Problems Reformulated
• Many applications are encouraging sharing data
heavily and users follow
• Multimedia isn’t only a lot of data, it’s also a lot
of information
• Users and engineers often unaware of (hidden)
retrieval possibilities of shared (multimedia) data
• Local anonymization and privacy policies
ineffective against cross-site inference
Monday, October 29, 12
97. Status Quo
• People will continue to want social
networks and location-based services
Monday, October 29, 12
98. Status Quo
• People will continue to want social
networks and location-based services
• Industry and research will continue to
improve retrieval techniques
Monday, October 29, 12
99. Status Quo
• People will continue to want social
networks and location-based services
• Industry and research will continue to
improve retrieval techniques
• Government will continue to do forensics
and intelligence gathering
Monday, October 29, 12
100. What Now?
• Research might help to:
• quantify and qualify risk factors
• visualize and offer choices in UIs
• identify privacy breaking information
Monday, October 29, 12
101. Conclusion
• We should continue to explore multimedia
retrieval
• At the same time we should:
• research methods to help mitigate risks and
offer choice
• develop privacy policies and APIs that take
into account multimedia retrieval
• educate users and engineers on privacy issues
Monday, October 29, 12
103. Take Home Message
• Be aware of the risks of revealing your
personal life online
Monday, October 29, 12
104. Take Home Message
• Be aware of the risks of revealing your
personal life online
• Think TWICE before you post something
on Facebook/Twitter/...
Monday, October 29, 12
105. Thank You!
Questions?
Work together with:
Robin Sommer, Oana Goga, Venkatesan Ekambaram, Kannan Ramchandran,
Luke Gottlieb, Howard Lei, Adam Janin, Oriol Vinyals, Trevor Darrell, Gerald
Friedland
and many others..
49
Monday, October 29, 12