Representing, Proving and Sharing Trustworthiness of Web Resources Using Veracity

Veracity Ontology

Representing, Proving and Sharing Trustworthiness of Web Resources Using

Veracity

Grégoire Burel, Amparo E. Cano, Matthew Rowe and Alfonso Sosa, OAK Group - University Of Sheffield

EKAW2010, Lisbon, Portugal 12 October 2010

Veracity Ontology

Trustworthiness and WWW

36+ Billion pages

13+ Billion triples

500+ Million Facebook Users

Veracity Ontology


36+ Billion pages

13+ Billion triples

500+ Million Facebook Users

What is true what is false ?(Can I rely on this information ?)

Veracity Ontology


• Questions of Trust:(Policies, provenance and content)– Who said this ? Really ?– Is this person trustworthy ?– Is this information trustworthy ?– Is the information not compromised?– Is it true ? Why ? Still ?– (…)

Veracity Ontology


• Questions of Trust:(Policies, provenance and content)– Who said this ? Really ?– Is this person trustworthy ?– Is this information trustworthy ?– Is the information not compromised?– Is it true ? Why ? Still ?– (…)

Policies and Control Provenance Content

Veracity Ontology

Trustworthiness is not…

Trustworthiness ≠ Provenance

Veracity Ontology

Trustworthiness is not…

Trustworthiness ≠ Provenance

Trustworthiness Provenance

But…

€

⊂

Veracity Ontology

So what is trustworthiness ? (1)

A proposition is trustworthy if the carried information is reliable, commonly accepted as true given pre-existing trusted knowledge and stable over time.

Veracity Ontology

So what is trustworthiness ? (2)

• Many components and factors:(Depending on the context…)– Willingness, confidence, risk and control (Mayer and Davis, 1995)– Content Trust vs. Entity Trust and 19 factors of trust (Gil and Artz,

2007)– Scope, Content Services and People (Golbeck, 2006)– (…)

Social Trust (= Entity Trust) vs. Rational Trust (≈ Content Trust)

Veracity Ontology

Veracity, shared Model of Rational Trustworthiness…

A tripartite Trustworthiness model and an Ontology based on Social Trustworthiness and Rational Trustworthiness.

Veracity Ontology



Social Trustworthiness:The validity of an information can only be verified by trusting the person that wrote the statement or confirms it.

Veracity Ontology



Social Trustworthiness:The validity of an information can only be verified by trusting the person that wrote the statement or confirms it.

Rational Trustworthiness:The validity of an information can be justified using direct or indirect knowledge:- The author can prove that he knows

about the proposition. (Knowledge Justification)

- There is a proposition that tends to confirm or contradict the current proposition. (Knowledge Reference)

Veracity Ontology


“Alice believe in the contentwritten by Bob because she

knows Bob.”

“Alice believe in the contentwritten by Bob because Bob is knowledgeableabout what is written.”

“Alice believe in the writtencontent because

it cites a trusted resource.”

Social Trust

Knowledge Justification

Knowledge Reference

Veracity Ontology

The Veracity ontology

http://purl.org/net/veracity/ns

FOAF

WOT

True or false ?

How much?[0..1]

How much [0…1]

http://nebula.dcs.shef.ac.uk/sparks/astreams

Veracity Ontology

Veracity in Real-Life

Did Einstein work at the University of Berlin and was a Physicist ?

Alice needs to know if Einstein was really a Physicist and worked at the university of Berlin. Unfortunately she doesn’t know anything about Einstein:

– Can she trust the author of the proposition ? (Social Trust)– Does the author know about Einstein ? (Rational Trust, Knowledge Justification)– Is there any other existing information meaning the same ? (Rational Trust, Knowledge Reference)– Does anybody else know about it ?

Alice

Veracity Ontology


Can I trust this author (Stephen Hawking) ?

Alice

Veracity Ontology



Alice

Veracity

You don’t know who he is. You should probably not trust him.

Social

Veracity Ontology



Alice

Veracity


Does this author know about Einstein?

Alice

Social

Veracity Ontology


Can I trust this author (Stephen Hawkins) ?

Alice

Veracity


Does this author know about Einstein?

Alice

Yes, He is known to be a famous Physicist.

Social

Rational, Knowledge Justification

Veracity

Veracity Ontology


Is there any other resources supporting this statement?

Alice

Veracity Ontology



Alice

Veracity

Yes, there is other trustworthy resources asserting similar propositions.

Rational, Knowledge Reference

Veracity Ontology



Alice

Veracity


Is there anybody else confirming that statement?

Alice


Veracity Ontology



Alice

Veracity


Is there anybody else confirming that statement?

AliceYes, some people confirmed the current proposition. However, you should check if they are trustworthy.


Veracity Ontology

Veracity vs. All

Prop. Ident.

Desc. Of

Trust.Agent Ident.

AgentCred.

Info.Supp.

Secure Assert.

Reliable Assert.

No Prev. Trust

Trust Ontology - - - -

WOT/Konfidi -

TRELLIS -

PML - -

Veracity

Abbreviations: = Yes. = Limited/Implicit. - = No.

Veracity Ontology

Conclusions

• Veracityis an abstract model and ontology .• Veracity introduces the concept of social trustworthiness and

rational trustworthiness• Veracity supports social and rational trustworthiness.• Veracity support recursive trust assertion.

• Veracity can be applied with different trust metrics.• Veracity is decentralised.• Veracity does not rely on trust assumptions.• Veracity ensure the integrity of trust statements (Digital Signature).

Veracity Ontology

Questions ?

http://purl.org/net/veracity/ns

Grégoire Burel, Amparo E. Cano, Matthew Rowe and Alfonso Sosa,{g.burel,e.cano,m.rowe,a.sosa}@dcs.shef.ac.uk

OAK Group - University Of Sheffield

Veracity Ontology

http://nebula.dcs.shef.ac.uk/sparks/astreams

Representing, Proving and Sharing Trustworthiness of Web Resources Using Veracity

Education

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