Security and Privacy for Data Decentralized Marketplaces

A special issue of Electronics (ISSN 2079-9292). This special issue belongs to the section "Networks".

Deadline for manuscript submissions: closed (15 May 2021) | Viewed by 8596

Special Issue Editors


E-Mail Website1 Website2
Guest Editor
Department of Network Engineering, Universitat Politècnica de Catalunya, 08034 Barcelona, Spain
Interests: security and privacy; digital rights management; network security

E-Mail Website
Co-Guest Editor
Department of Computer Science, Universidad de Málaga, 29071 Malaga, Spain
Interests: security and privacy; critical infrastructure protection; Internet of Things security

Special Issue Information

Dear Colleagues,

A new data-driven economy has arisen in which data are created, gathered, and exchanged (raw or processed) between organizations and individuals. Companies not only collect the data they are generating and analyze them but increasingly rely on third-party data to enhance their business value. Data are no longer an enabler of products, but a product itself that can be monetized.

Data marketplaces are becoming increasingly popular as intermediaries that orchestrate connections between data providers and data consumers. The data market has been dominated mainly by commercial and privately-managed trading platforms with a centralized governance that decide on the rules, policies, etc. That centralized model puts current big players in a clear competitive advantage. In addition, business success on marketplaces has been heavily based on reputation. i.e., how a provider has behaved in the past. This has been a major stopper for the flourish of a truly competitive data economy, where all stakeholders should freely participate under fair competition.

There is, however, light at the end of the tunnel thanks to distributed ledger technologies (DLTs), popularly known as Blockchains. Blockchains are very compelling since they provide important features such as transparency, immutability, and a single source of truth, as well as allowing the creation of smart contracts. Smart contracts are functions or procedures that will be executed by Blockchains whenever triggered. These properties make Blockchains the perfect tools for creating data marketplaces and enable trust between data consumers and providers without a priori reputation. This represents a paradigm shift where trust is no longer based on reputation but on certainty—the certainty that the data trade is going to be executed following the business logic defined in smart contracts.

Moreover, decentralized marketplaces will enable new architectures that will empower users and make rules more transparent and auditable. Distributed marketplaces should also face the remaining challenges of the sector, which are, notably, regulatory complexity, privacy, and the need to guarantee the data owner’s control over the trading of their data.

The purpose of this Special Issue is to gather the latest advances in security and privacy in decentralized data marketplaces, for which we encourage the submission of papers with new results, methods, protocols, architectures or applications. In particular, the topics of interest include (but are not limited to):

  • Decentralized marketplaces architectures
  • Blockchain-based marketplaces
  • Smart contracts
  • Payment systems
  • Monetization/tokenization
  • Privacy
  • Trust
  • Fair exchange
  • Governance
  • Federated authentication
  • Self-sovereign identity
  • Wallets
  • Privacy-enabled data storage solutions
  • Explicit consent
  • Auditing systems
  • Conflict resolution
  • Data marketplaces for Industry 4.0
  • Digital rights management (DRM) and protection
  • Disclosure control

Prof. Dr. Miguel Soriano
Guest Editors
Prof. Dr. Javier Lopez
Co-Guest Editor

Manuscript Submission Information

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Published Papers (3 papers)

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Research

20 pages, 786 KiB  
Article
Decentralized Factoring for Self-Sovereign Identities
by Nasibeh Mohammadzadeh , Sadegh Dorri Nogoorani  and José Luis Muñoz-Tapia 
Electronics 2021, 10(12), 1467; https://doi.org/10.3390/electronics10121467 - 18 Jun 2021
Cited by 1 | Viewed by 2786
Abstract
Invoice factoring is a handy tool for developing businesses that face liquidity problems. The main property that a factoring system needs to fulfill is to prevent an invoice from being factored twice. Distributed ledger technology is suitable for implementing the platform to register [...] Read more.
Invoice factoring is a handy tool for developing businesses that face liquidity problems. The main property that a factoring system needs to fulfill is to prevent an invoice from being factored twice. Distributed ledger technology is suitable for implementing the platform to register invoice factoring agreements and prevent double-factoring. Several works have been proposed to use this technology for invoice factoring. However, current proposals lack in one or several aspects, such as decentralization and security against corruption, protecting business and personally identifiable information (PII), providing non-repudiation for handling disputes, Know-Your-Customer (KYC) compliance, easy user on-boarding, and being cost-efficient. In this article, a factoring registration protocol is proposed for invoice factoring registration based on a public distributed ledger which adheres to the aforementioned requirements. We include a relayer in our architecture to address the entry barrier that the users have due to the need of managing cryptocurrencies for interacting with the public ledger. Moreover, we leverage the concept of Verifiable Credentials (VCs) for KYC compliance, and allow parties to implement their self-sovereign identities by using decentralized identifiers (DIDs). DIDs enable us to relay on the DIDComm protocol for asynchronous and secure off-chain communications. We analyze our protocol from several security aspects, compare it to the related work, and study a possible business use case. Our evaluations demonstrate that our proposal is secure and efficient, as well as covers requirements not addressed by existing related work. Full article
(This article belongs to the Special Issue Security and Privacy for Data Decentralized Marketplaces)
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22 pages, 962 KiB  
Article
A Multi-Party Contract Signing Solution Based on Blockchain
by Josep-Lluis Ferrer-Gomila and M. Francisca Hinarejos
Electronics 2021, 10(12), 1457; https://doi.org/10.3390/electronics10121457 - 18 Jun 2021
Cited by 11 | Viewed by 3013
Abstract
Fair digital signature of contracts and agreements is an essential process in any electronic commerce scenario, and therefore also in data marketplaces, where the relationships and agreements among the different parties (consumers and providers) are more dynamic. In multi-party contract signing, N parties [...] Read more.
Fair digital signature of contracts and agreements is an essential process in any electronic commerce scenario, and therefore also in data marketplaces, where the relationships and agreements among the different parties (consumers and providers) are more dynamic. In multi-party contract signing, N parties wish to sign a contract in a such a way that either all signatories obtain evidence of the signing or none obtains conflicting evidence regarding the honest signatories; the exchange must be fair. In this paper, we propose a blockchain-based multi-party contract signing protocol. This solution does not require the existence or potential intervention of a trusted third party (TTP), thus avoiding the difficulty of N signatories agreeing upon a TTP. In addition, this proposal meets the necessary requirements: fairness, timeliness, non-repudiation of origin, and non-repudiation of receipt. Furthermore, confidentiality can be easily achieved. To minimize costs associated with the use of blockchain, it should be invoked in the case of exception (analogous to optimistic solutions with a TTP) and by only one of the N signatories. However, when the use of blockchain is required, we show that its cost is within perfectly manageable margins. Full article
(This article belongs to the Special Issue Security and Privacy for Data Decentralized Marketplaces)
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25 pages, 893 KiB  
Article
DEFS—Data Exchange with Free Sample Protocol
by Rafael Genés-Durán, Juan Hernández-Serrano, Oscar Esparza, Marta Bellés-Muñoz and José Luis Muñoz-Tapia
Electronics 2021, 10(12), 1455; https://doi.org/10.3390/electronics10121455 - 17 Jun 2021
Cited by 1 | Viewed by 1915
Abstract
Distrust between data providers and data consumers is one of the main obstacles hampering the take-off of digital-data commerce. Data providers want to get paid for what they offer, while data consumers want to know exactly what they are paying for before actually [...] Read more.
Distrust between data providers and data consumers is one of the main obstacles hampering the take-off of digital-data commerce. Data providers want to get paid for what they offer, while data consumers want to know exactly what they are paying for before actually paying for it. In this article, we present a protocol that overcomes this obstacle by building trust based on two main ideas. First, a probabilistic verification protocol, where some random samples of the real dataset are shown to buyers in order to allow them to make an assessment before committing any payment; and second, a guaranteed, protected payment process enforced with smart contracts on a public blockchain that guarantees the payment of data if and only if the provided data meet the agreed terms, and that honest players are otherwise refunded. Full article
(This article belongs to the Special Issue Security and Privacy for Data Decentralized Marketplaces)
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