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December 11, 2019
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Visa’s Rolls Out New Blockchain LucidiTEE – Tackles Concerns related to misuse of sensitive user information, when shared with third-parties.

Visa’s LucidiTEE claims to be the primary system to allow a number of events to collectively compute on large-scale non-public information whereas guaranteeing policy-compliance even when the enter suppliers are offline and permits equity to all output recipients. The mission, from the analysis arm of Visa –  goals to tackle rising considerations related to misuse of sensitive user information when shared with third-parties. 

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It is a system they declare supplies transparency and management to customers by: 

Enforcing agreed-upon insurance policies on what features could be evaluated over non-public information (even when the customers are offline).
Enforcing the set of events with whom the outcomes are shared. For this degree of management, the system should guarantee coverage compliance, and so they exhibit, utilizing trendy purposes, the necessity for history-based insurance policies, the place any determination to compute on customers’ information will depend on prior use of that information. Moreover, the system should algorithmically guarantee equity: if any social gathering will get the output, then so do all sincere events. It is an open analysis problem to assemble a system that ensures these properties in a malicious setting.

From the dense, prolonged paper known as  LucidiTEE: Policy-based Fair Computing at Scale: 

“In light of the widespread misuse of personal data, we enable users to control the sharing and use of their data, even when offline, by binding that data to policies. A policy specifies the allowed function, conditions guarding the execution (based on the history of all prior computations on that data), and identities of the input providers and output recipients. For this level of control, we aim for a computer system that ensures policy compliance to the input providers, and fairness (i.e., either all or no party gets the output) to the output recipients, without requiring these parties to trust each other or the compute host. Recently, trusted execution environments (TEEs), such as Intel SGX and Sanctum enclaves, are finding applications in outsourced computing on sensitive data. However, since TEEs are at the mercy of an untrusted host for storage and network communication, they are incapable of enforcing history-dependent policies or fairness.”

“For instance, against a user’s wish that only an aggregate function over her entire data is revealed, an adversarial host can repeatedly evaluate that aggregate function on different subsets of her dataset, and learn the individual records. The adversary may also collude and deliver the output only to a subset of the output recipients, thus violating fairness. This paper presents LucidiTEE, the first system to enable multiple parties to jointly compute on large-scale private data while guaranteeing that the aforementioned policies are enforced even when the input providers are offline and guaranteeing fairness to all output recipients. To that end, LucidiTEE develops a set of novel protocols between a network of TEEs and a shared, append-only ledger. LucidiTEE uses the ledger only to enforce policies; it does not store inputs, outputs, or state on the ledger, nor does it duplicate execution amongst the participants, which allows it to scale to large data and a large number of parties. We demonstrate several policy-based applications including personal finance, federated machine learning, fair n-party information exchange, and private set intersection for medical records.”

According to the paper, LucidiTEE was trialled on Hyperledger Fabric and Tendermint –  however it seems it may also be used on forkless public blockchains that use a proof-of-stake consensus system. 

The paper concludes that LucidiTEE permits events to collectively compute on non-public information, utilizing protocols (between TEEs and a shared ledger) to be certain that all computations present equity and comply with history-based insurance policies, even when any subset of events act maliciously. The ledger is just used to implement insurance policies (i.e., it doesn’t retailer inputs, outputs, or state), letting them scale to a big quantity of events and huge information.

About Richard Kastelein

Founder and writer of business publication Blockchain News (EST 2015), a associate at ICO companies collective Token.Agency ($750m+ and 90+ ICOs and STOs), director of schooling firm Blockchain Partners (Oracle Partner) – Vancouver native Richard Kastelein is an award-winning writer, innovation government and entrepreneur. He sits on the advisory boards of some two dozen Blockchain startups and has written over 1500 articles on Blockchain know-how and startups at Blockchain News and has additionally revealed pioneering articles on ICOs in Harvard Business Review and Venturebeat. Irish Tech News put him within the prime 10 Token Architects in Europe.

Kastelein has an Ad Honorem – Honorary Ph.D. and is Chair Professor of Blockchain at China’s first Blockchain University in Nanchang on the Jiangxi Ahead Institute of Software and Technology. In 2018 he was invited to and attended University of Oxford’s Saïd Business School for Business Automation four.zero programme.  Over a half a decade expertise judging and rewarding some 1000+ innovation tasks as an EU professional for the European Commission’s SME Instrument programme as a startup assessor and as a startup decide for the UK authorities’s Innovate UK division.

Kastelein has spoken (keynotes & panels) on Blockchain know-how in Amsterdam, Antwerp, Barcelona, Beijing, Brussels, Bucharest, Dubai, Eindhoven, Gdansk, Groningen, the Hague, Helsinki, London (5x), Manchester, Minsk, Nairobi, Nanchang, Prague, San Mateo, San Francisco, Santa Clara (2x), Shanghai, Singapore (3x), Tel Aviv, Utrecht, Venice, Visakhapatnam, Zwolle and Zurich.

He is a Canadian (Dutch/Irish/English/Métis) whose writing profession has ranged from the Canadian Native Press (Arctic) to the Caribbean & Europe. He’s written often for Harvard Business Review, Wired, Venturebeat, The Guardian and Virgin.com, and his work and concepts have been translated into Dutch, Greek, Polish, German and French. A journalist by commerce, an entrepreneur and adventurer at coronary heart, Kastelein’s skilled profession has ranged from political publishing to TV know-how, boatbuilding to judging startups, skippering yachts to advertising and marketing and extra as he is travelled for practically 30 years as a Canadian expatriate residing all over the world. In his 20s, he sailed all over the world on small yachts and wrote a sequence of journey articles known as, ‘The Hitchhiker’s Guide to the Seas’ travelling by hitching rides on yachts (1989) in main journey and yachting publications. He presently lives in Groningen, Netherlands the place he is elevating three teenage daughters with his spouse and crusing associate, Wieke Beenen.

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Also revealed on Medium.

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