WebID4VIVO

Erich Bremer and Tammy DiPrimaStony Brook University

July 18, 2013

PREVIEW

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What is WebID?Single Sign-on authenticationNo Passwords (uses digital certificates)Central Identity

Being developed by the W3C WebID Community Group67 Members, Henry Story – Chair

Originally, it went under the name foaf+sslThe term "WebID" was coined by Dan Brickley and Tim Berners-Lee in 2000

Hopefully, WebID will be in the standards track this year… (fingers crossed)

Key A – I can’t decrypt what I encrypt, but I can decrypt anything Key B encryptsKey B – I can’t decrypt what I encrypt, but I can decrypt anything Key A encrypts

Pick A/B or B/AOne becomes “Public key”The other the “Private key” Once selection is made, never change it!

How this mathematical relationship works is the subject of another talk…

How does WebID work in a Nutshell?Public Key Encryption

A behind

the s

cenes

look…

How does WebID work in a Nutshell?Version: 3 (0x2)Serial Number: 5f:df:d6:be:2c:73:c1:fb:aa:2a:2d:23:a6:91:3b:5cIssuer: O=FOAF+SSL, OU=The Community of Self Signers, CN=Not a Certification Authority ValidityNot Before: Jun 8 14:16:14 2010 GMTNot After : Jun 8 16:16:14 2010GMT Subject: O=FOAF+SSL, OU=The Community Of Self Signers, CN=WebID for Erich BremerSubject Public Key Info:

Public Key Algorithm: rsaEncryption Public-Key: (2048 bit)Modulus: B8:CD:08:20:2D:…….(much much longer than this!)Exponent: 65537 (0x10001)

X509v3 extensions: X509v3Basic Constraints: critical

CA:FALSEX509v3 Key Usage: critical

Digital Signature, Non Repudiation, Key Encipherment, Key AgreementNetscape Cert Type: SSL Client, S/MIMEX509v3 Subject Key Identifier: 08:8E:A5:5B:AE:5D:C3:8B:00:B7:30:62:65:2A:5A:F5:D2:E9:00:FA X509v3Subject Alternative Name: critical

URI:http://www.ebremer.com/foaf.rdf#meSignature Algorithm: sha1WithRSAEncryption

c0:fd:ac:bc:fb:1b:c9:e0:1c:01:18:5e:44:bb: d8:b8:……. (another really really long string)

The X509v3 Certificate

A Sample WebID profile (non-vivo)<http://www.ebremer.com/foaf.rdf#me> a foaf:Person ; foaf:family_name "Bremer" ; foaf:firstName "Erich" ; foaf:knows <http://bblfish.net/people/henry/card#me> ; foaf:knows <http://tdiprima.com/foaf.rdf#me> foaf:status "Happy" ; cert:key [ a cert:RSAPublicKey ; cert:exponent 65537 ; cert:modulus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http://www.w3.org/2001/XMLSchema#hexBinary> ] ;

How does WebID work in a Nutshell?The Process

Auth Server

Jon Client

Jon Client’s WebID profile server

Hey, I want to log onGive me your

WebID certificateProve to me you have the private key to this

public keyGive me the WebID

profile for the URI listed in this WebID certificate

Here ya go!

Here ya go!

Compares modulus and exponent of

WebID cert to the WebID profile

Here ya go!

Hi Jon!

WebID and VIVO make for great dance partners

WebID4VIVO• Allows VIVO to accept WebID for authentication• Allows VIVO to be a WebID provider• Leverages the fact that VIVO provides RDF foundation for WebID• Installs within and along side VIVO itself• moves data in and out of VIVO using VIVO DAO’s to maintain portability

will be available at the low price of free and open-source (BSD – same as VIVO :-)

WebID and VIVO (WebID4VIVO)

Possible Future directions using WebID and VIVOW3C WebAccessControl Ontology

http://www.w3.org/wiki/WebAccessControlEnable inter-VIVO logins allowing remote delegated editors.

Web Of Trust Ontologyhttp://xmlns.com/wot/0.1/

Open Annotations Model (W3C Community Group)http://www.openannotation.org/spec/core/

Link Data Platform (W3C Working Group)http://www.w3.org/2012/ldp/wiki/Main_Page

DEMO TIME!

Learn more about WebID at:http://www.w3.org/wiki/WebID