Social Intelligence for
Security Informatics
Cyber Security Lab
The Web 2.0 technologies have made
citizen-, user-, consumer-generated
contents a tremendous asset for
understanding various social phenomena.
•  The social media sites provide a platform
for Internet users around the world to
communicate with each other and express
their opinions.
Analysis of social media opinions is
potentially valuable for
•  Discovering on-going topics of interests in
the public
•  Predicting events in the real world
•  Utilizing the online social networks for
information dissemination and intervention
•  Supporting emergency response
Link and Content Analysis of Social Media Communities
Applications
•  Track potential threatening opinions and
discussions that may threaten national and
public safety
•  Predict the impact of the social media
development on the real world event
•  Support decision making to minimize the
potential threats to public safety
•  Based on this analysis, we shall further develop applications such as
monitoring the theme and structural evolution, active sub-group
identification, and information flow classification
Evolution in Social Media
•  To better understand and analyze social media discussion, it is
important to discover the evolution relationships between different
topic aspects.
•  Developing a topic aspect evolution graph modeling framework and
utilize social network information, content similarity and temporal
proximity to model evolution relationships between topic aspects
Online Social Network Analysis
Social Media
Discovery & Collection
People
Interact
People Space
Many people participate in social
media
The same person may participates in
multiple social media platforms
Social Media /
Internet
Courses
of forum
discussions
Content
Many short • messages
in social media
Many discussion
forums in Internet
•  Techniques
Individual Social Capitals
Network Usefulness / Influence to
Individuals
Content Space
Thread Categorization
Concept Extraction & Association
Monitoring & Alert Agent
Social
Media
Seeds
Web Forum Directory Browsing
& Searching
Social Network Analysis
Network Theory
Spectral Analysis
Sentiment & Subjectivity Detection
Crawler
Query
Concept
Network
Query Interface
Levels of
Abstraction
Techniques
Machine Learning
Statistical Analysis
Natural Language
Processing
Social
Network
Interactive
Information
Visualization
Techniques
Fisheye View
Fractal View
Time Line
Hyperbolic Tree
VIBE
Query-dependent Exploration
Topics
of Interest
•  People/group
of Interest
•  User Interface
Domains & Applications
drexel.edu/cci
National Security
Threat
•  Assessment
Surveillance
•  Crime
•  Investigation
Health
Social
•  Support
Health
•  Intervention program
Health
•  Outcomes
Entertainment
Hot
•  Sports Topics
Popular
•  Culture
Trend
•  Movement Spotting & Tracking
Influence
Time
Social Relationships & Information
Diffusion
Contribute
BACKGROUND
Christopher C. Yang