LinkChains: Trusted Personal Linked Data Allan Third and John - - PowerPoint PPT Presentation

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Nov 06, 2022 458 likes •700 views

LinkChains: Trusted Personal Linked Data Allan Third and John Domingue {allan.third,john.domingue}@open.ac.uk Motivation Motivation Motivation The FAIR Principles F indable Globally persistent IDs and metadata A ccessible

SLIDE 1

LinkChains: Trusted Personal Linked Data

Allan Third and John Domingue {allan.third,john.domingue}@open.ac.uk

SLIDE 2

Motivation

SLIDE 3

Motivation

SLIDE 4

Motivation

SLIDE 5

The FAIR Principles

Findable

– Globally persistent IDs and metadata

Accessible

– Retrievable in a standard way (with auth?)

Interoperable

– Formal & machine-readable representation

Reusable

– Licences, attributes, and provenance

SLIDE 6

TRADE Principles

Trusted

– Data & claims, publisher, timestamp verifiable

Autonomous

– Access to & use of data controlled by owner

Distributed

– Storage & computation spread across network

DEcentralised

– Open, nodes are independent

SLIDE 7

Valuable Personal Data is…

Personal or sensitive

– Potentially misusable – Damaging if overshared

Leads to gains when shared selectively

– when accurate!

SLIDE 8

Decentralized web apps share access to personal data stores

https://itsfoss.com/solid-decentralized-web/

SLIDE 9

SOLID Personal Data Pod Distributed data storage Web/Mobile Application or Client

Private data soley under user control Public and private data Decentralised ledger and ‘global computer’

User controlled read/write access Public and private data storage and access Recording, Verification and Asset Transfer

Web/Mobile Application or Client

Private data solely under user control Public and private data Decentralized ledger and ‘global computer’

LinkChain Components

SLIDE 10

Anchoring data on a blockchain

{ ou:student1 :recipient ou:jstrange2323 ; :badge “Magic 101”^^xsd:string. } ab8d0f09b90bf9080080de

SLIDE 11

Federation

{ ou:student1 :recipient ou:jstrange2323 ; :badge “Magic 101”^^xsd:string. }

😂

{ ou:student1 :recipient ou:jstrange2323 ; :badge “Magic 101”^^xsd:string. }

SLIDE 12

Federation

🤸

{ ou:student1 :recipient ou:jstrange2323 ; :badge “Magic 101”^^xsd:string. } { :landowner1212 gov:ownerIn gov:herefordshire . } { ou:jstrange2323 owl:sameAs :landowner1212 . } { ou:student1 gov:ownerIn gov:herefordshire . }

SLIDE 13

Merkle tree

https://commons.wikimedia.org/wiki/File:MerkleTree1.JPG Georg987 [CC BY-SA 3.0] Hashed data items Merkle root Hash of child nodes

SLIDE 14

Merkle proofs

Image: ibid. Merkle root