social networking security
DESCRIPTION
Social Networking Security. Adam C. Champion and Dong Xuan CSE 4471: Information Security. Outline. Overview of Social Networking On-line Social Networking Mobile Social Networking Threats and Attacks Defense Measures. Online Social Networking (OSN). - PowerPoint PPT PresentationTRANSCRIPT
Social Networking Security
Adam C. Champion and Dong Xuan
CSE 4471: Information Security
Outline
• Overview of Social Networking– On-line Social Networking
–Mobile Social Networking
• Threats and Attacks
• Defense Measures
Online Social Networking (OSN)
• Online Web services enabling people to connect with each other, share information– Common friends, interests, personal info, …
– Post photos, videos, etc. for others to see
– Communicate via email, instant message, etc.
• Major OSN services: Facebook, Twitter, MySpace, LinkedIn, etc.
“Giving people the power to share and make the world more open and connected.”
OSN Popularity
• Over 900 million Facebook users worldwide [6]– Over 150 million in U.S. [5]
– Over 450 million access via mobile [6]
– 300 million pictures uploaded to Facebook daily [6]
• Over 140 million Twitter users; over 340 million Tweets sent daily [7]
• Over 175 million LinkedIn members in over 200 countries [8]
Benefits of OSN Communication
• Vast majority of college students use OSNs– Organizations want to market products, services, etc.
to this demographic– OSNs can help them reach these potential buyers
• OSNs provide communal forum for expression (self, group, mass), collaboration, etc.– Connect with old friends, find new friends and connect– Play games with friends, e.g., Mafia Wars, Scrabulous– Commerce in “virtual items”
• But using OSNs poses security issues for orgs as well as individuals
Mobile Social Networking
• E-SmallTalker
• E-Shadow
8
Application Scenario: Conference
Small Talk
• People come into contact opportunistically
• Face-to-face interaction– Crucial to people's social networking
– Immediate non-verbal communication
– Helps people get to know each other
– Provides the best opportunity to expand social network
• Small talk is an important social lubricant– Difficult to identify significant topics
– Superficial
10
A Naive Approach of Smartphone-based Small Talk
• Store all user’s information, including each user’s full contact list
• User report either his own geo-location or a collection of phone IDs in his physical proximity to the server using internet connection or SMS
• Server performs profile matching, finds out small talk topics (mutual contact, common interests, etc.)
• Results are pushed to or retrieved by users
11
However……
• Require costly data services (phone’s internet connection, SMS)
• Require report and store sensitive personal information in 3rd party
• Trusted server may not exist
• Server is a bottleneck, single point of failure, target of attack
12
E-SmallTalker – A Fully Distributed Approach
• No Internet connection required
• No trusted 3rd party
• No centralized server
• Information stored locally on mobile phones
• Original personal data never leaves a user’s phone
• Communication only happens in physical proximity
13
E-Shadow
• Enhanced E-SmallTalker
– Local profiles
–Mobile phone based local social interaction tools• E-Shadow publishing
• E-Shadow localization
Outline
• Overview of Social Networking
• Threats and Attacks
• Defense Measures
OSN Security Threats/Attacks
• Malware distribution• Cyber harassment, stalking, etc.• Information “shelf life” in cyberspace• Privacy issues:– Information about person posted by him/herself, others– Information about people collected by OSNs
• Information posted on OSNs impacts unemployment, insurance, etc.
• Organizations’ concerns: brand, laws, regulations
MSN Security Threat/Attacks
• Personal information leakage– Particularly dangerous because of physical proximity
• Malware distribution
17
Outline
• Overview of Social Networking
• Threats and Attacks
• Defense Measures
“Common Sense” Measures (1)• Use strong, unique passwords• Provide minimal personal information: avoid entering
birthdate, address, etc.• Review privacy settings, set them to “maximum privacy”
– “Friends of friends” includes far more people than “friends only”• Exercise discretion about posted material:
– Pictures, videos, etc.– Opinions on controversial issues– Anything involving coworkers, bosses, classmates, professors– Anything related to employer (unless authorized to do so)
• Be wary of 3rd party apps, ads, etc. (P.T. Barnum’s quote)• Supervise children’s OSN activity
“Common Sense” Measures (2)
• “If it sounds too good to be true, it probably is”• Use browser security tools for protection:– Anti-phishing filters (IE, Firefox)– Web of Trust (crowdsourced website trust)– AdBlock/NoScript/Do Not Track Plus
• Personal reputation management:– Search for yourself online, look at the results…– Google Alerts: emails sent daily to you about results
for any search query (free), e.g., your name• Extreme cases:– Cease using OSNs, delete accounts– Contact law enforcement re. relentless online
harassment
E-SmallTalker: Privacy-Preserved Information Exchange
Example of Alice’s Bloom filter
Alice has multiple contacts, such as Bob, Tom, etc.
Encode contact strings, Firstname.lastname@phone_number, such as “Bob.Johnson@5555555555” and
“Tom.Mattix@6141234567”
21
E-Shadow: Layered Publishing
• Spatial Layering– WiFi SSID
• at least 40-50 meters, 32 Bytes
– Bluetooth Device (BTD) Name • 20 meters, 2k Bytes
– Bluetooth Service (BTS) Name• 10 meters, 1k Bytes
• Temporal Layering– For people being together long or repeatedly– Erasure Code
Final Remarks
• On-line social networking systems are very popular and mobile social networking systems are emerging
• Malware distribution and personal information leakage are two most prominent threats and attacks
• Personal countermeasures are most effective
References (1)1. G. Bahadur, J. Inasi, and A. de Carvalho, Securing the Clicks: Network Security in the Age of Social
Media, McGraw-Hill, New York, 2012.
2. H. Townsend, 4 Jun. 2010, http://www.k-state.edu/its/security/training/roundtables/presentations/SIRT_roundtable-RisksofSocialNetworking-Jun10.ppt
3. U.S. Dept. of State, “Social Networking Cyber Security Awareness Briefing,” http://www.slideshare.net/DepartmentofDefense/social-media-cyber-security-awareness-briefing
4. National Security Agency, “Social Networking Sites,” http://www.nsa.gov/ia/_files/factsheets/I73-021R-2009.pdf
5. Consumer Reports, Jun. 2012, http://www.consumerreports.org/cro/magazine/2012/06/facebook-your-privacy/index.htm
6. S. Sengupta, 14 May 2012, http://www.nytimes.com/2012/05/15/technology/facebook-needs-to-turn-data-trove-into-investor-gold.html?_r=1&pagewanted=all
7. T. Wasserman, 21 Mar. 2012, http://mashable.com/2012/03/21/twitter-has-140-million-users/
8. LinkedIn Corp., 2012, http://press.linkedin.com/about
9. R. Richmond, “Web Gang Operating in the Open,” 16 Jan. 2012, https://www.nytimes.com/2012/01/17/technology/koobface-gang-that-used-facebook-to-spread-worm-operates-in-the-open.html?_r=1
References (2)
10. J. Drömer and D. Kollberg, “The Koobface malware gang – exposed!”, 2012, http://nakedsecurity.sophos.com/koobface/
11. Wikipedia, https://en.wikipedia.org/wiki/Suicide_of_Megan_Meier
12. M. Schwartz, “The Trolls Among Us,” 3 Aug. 2008, https://www.nytimes.com/2008/08/03/magazine/03trolls-t.html?pagewanted=all
13. M. Raymond, “How Tweet It Is!: Library Acquires Entire Twitter Archive,” 14 Apr. 2010, http://blogs.loc.gov/loc/2010/04/how-tweet-it-is-library-acquires-entire-twitter-archive/
14. B. Borsboom, B. van Amstel, and F. Groeneveld, “Please Rob Me”, http://pleaserobme.com
15. D. Love, “13 People Who Got Fired for Tweeting,” 16 May 2011, http://www.businessinsider.com/twitter-fired-2011-5?op=1
16. C. Smith and C. Kanalley, “Fired Over Facebook: 13 Posts That Got People Canned,” http://www.huffingtonpost.com/2010/07/26/fired-over-facebook-posts_n_659170.html
17. https://twitter.com/BPglobalPR
18. http://curl.haxx.se/
19. http://jonathonhill.net/2012-05-18/unshorten-urls-with-php-and-curl/
20. http://www.securingsocialmedia.com/resources/