Credibility,IdentityResolution,andPrivacyonOnlineSocialMedia

IEEEInternational Conference onComputing,AnalyticsandSecurity Trends(CAST-2016)

COEPDec20,2016

PonnurangamKumaraguru(“PK”)AssociateProfessor

ACMDistinguishedSpeakerfb/ponnurangam.kumaraguru,@ponguru

WhoamI?

� AssociateProfessor,IIIT-Delhi� Ph.D.fromSchoolofComputerScience,

CarnegieMellonUniversity(CMU)� Researchinterests-SocialComputing,ComputationalSocialScience,ComplexNetworkspertainingtoHumanBehavior,specificallyinthecontextofSecurity&Privacy

� Co-ordinateandmanagePrecog,precog.iiitd.edu.in

� ACMDistinguishedSpeaker

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https://www.youtube.com/channel/UCHWDvGDh4QjWbV79bM2neSg

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Whatwedabblewith!

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https://arxiv.org/pdf/1611.01911v2

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http://labs.precog.iiitd.edu.in/killfie/

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http://precog.iiitd.edu.in/blog/2016/11/killfie-journey/

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http://precog.iiitd.edu.in/Publications_files/aa-spyingextensions.pdf

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Non-trustworthyContent

FAKE

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$

RUMORS

Methodology

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TrainingData

� 500Tweetsperevent� UsedCrowdFlower

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Event Tweets UsersBostonMarathonBlasts(2013) 7,888,374 3,677,531

Typhoon Haiyan /Yolanda(2013) 671,918 368,269

CyclonePhailin (2013) 76,136 34,776

WashingtonNavy yard shootings (2013) 484,609 257,682

Polarvortex cold wave (2014) 143,959 116,141

OklahomaTornadoes (2013) 809,154 542,049

Total 10,074,150 4,996,448

CredibilityModeling

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Featureset Features (45)

Tweetmeta-dataNumberofsecondssincethetweet;Sourceoftweet(mobile/web/etc);Tweetcontainsgeo-coordinates

Tweetcontent(simple)

Numberofcharacters;Numberofwords;NumberofURLs;Numberofhashtags;Numberofuniquecharacters;Presenceofstocksymbol;Presenceofhappysmiley;Presenceofsadsmiley;Tweetcontains`via';Presenceofcolonsymbol

Tweetcontent(linguistic)

Presenceofswearwords;Presenceofnegativeemotionwords;Presenceofpositiveemotionwords;Presenceofpronouns;Mentionofselfwordsintweet(I;my;mine)

Tweetauthor Numberoffollowers;friends;timesincetheuserifonTwitter;etc.

TweetnetworkNumberofretweets;Numberofmentions;Tweetisareply;Tweetisaretweet

Tweet links WOTscorefortheURL;Ratiooflikes/dislikesforaYouTubevideo

Implementation

FeedbackbyUsers

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Harvard(1839)– Harvard– Harvard– Harvard– MIT–Northwestern– UIUC– WUSL– CMU(2009)– IIITD(2015)

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http://twitdigest.iiitd.edu.in/TweetCred/

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De-duplicatingaudience

Socialaudience =437,632+153,000+805,097orless??

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Challenges

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ProfessionalOpinion

Dating

HeterogeneousOSNs

Personal

DegreeofDetails

QualityanddescriptivepersonalAndprofessionalinformation

LittlepersonalinformationDescriptiveopinions

AttributeEvolution

Time

Informationevolvedononebutnotonother

{jainpari,Bangalore}

RegistrationwithsameinformationonbothOSNs{paridhij,NewDelhi}

GenericIdentityResolution

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Extractavailable&

discriminativefeatures

CandidateIdentities

IDENTITYSEARCH IDENTITYLINKING

PairwiseComparisons

HeuristicIdentitySearch

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Profile

Content

Self-mention

Network Syntactic and Image

Search Linking

If self-identified / returned by

more than one search method

No

Yes

Candidate Identities

name, location,usernamemobile no,

post,friends,

followers

ParidhiJain,Ponnurangam Kumaraguru,andAnupam Joshi.2013.@Iseek‘fb.me’:IdentifyingUsersacrossMultipleOnlineSocialNetworks.InProceedingsofthe22ndInternationalConferenceonWorldWideWeb,WWW’13Companion.ACM,NewYork,NY,USA,1259- 1268.DOI=http://dx.doi.org/10.1145/2487788.2488160[HonorableMentionAward}

Harvard(1839)– Harvard– Harvard– Harvard– MIT–Northwestern– UIUC– WUSL– CMU(2009)– IIITD(2016)

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HowmanyofyouhavepostedmobilenumbersonOnlineSocial

Networks?

Howmanyofyouhaveseenmobilenumbersbeingpostedon

OnlineSocialNetworks?

Sampleposts

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Sampleposts

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Sampleposts

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Sampleposts

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Datastatistics

� Twitter:12thOctober2012– 20thOctober2013� Facebook:16thNovember2012– 20thApril2013

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Numbers Category+91 Category0 Categoryvoid Total

Twitter Facebook Twitter Facebook Twitter Facebook Twitter Facebook

MobileNumbers

885 2,191 14,909 8,873 25,566 25,294 41,360 36,358

Userprofiles

1,074 2,663 17,913 9,028 31,149 25,406 49,817 36,588

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SocialCallerApp

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https://play.google.com/store/apps/details?id=com.ayush.socialcaller&hl=en

Takeaways

�OnlineSocialMediaisadifferentbeastintermsofprivacy,identity,andcredibility-Research/technologiesshouldbedeveloped

�Multipleinterestingresearch,engineering,andinnovationwaitingtobedone

� Interestedinhostingstudents– B.Tech.,M.Tech.,Ph.D.

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https://www.facebook.com/PreCog.IIITD/