Core TuLiP

We propose CoreTuLiP - the core of a trust management language based on Logic Programming. CoreTuLiP is based on a subset of moded logic programming, but enjoys the features of TM languages such as RT; in particular clauses are issued by different authorities and stored in a distributed manner. We present a lookup and inference algorithm which we prove to be correct and complete w.r.t. the declarative semantics. CoreTuLiP enjoys uniform syntax and the well-established semantics and is expressive enough to model scenarios which are hard to deal with in RT

A flexible architecture for privacy-aware trust management

In service-oriented systems a constellation of services cooperate, sharing potentially sensitive information and responsibilities. Cooperation is only possible if the different participants trust each other. As trust may depend on many different factors, in a flexible framework for Trust Management (TM) trust must be computed by combining different types of information. In this paper we describe the TAS3 TM framework which integrates independent TM systems into a single trust decision point. The TM framework supports intricate combinations whilst still remaining easily extensible. It also provides a unified trust evaluation interface to the (authorization framework of the) services. We demonstrate the flexibility of the approach by integrating three distinct TM paradigms: reputation-based TM, credential-based TM, and Key Performance Indicator TM. Finally, we discuss privacy concerns in TM systems and the directions to be taken for the definition of a privacy-friendly TM architecture.\u

Kickstarter My Heart: Extraordinary Popular Delusions and the Madness of Crowdfunding Constraints and Bitcoin Bubbles

This Article builds on my existing research program that (a) broadly seeks to analyze laws, regulations, instruments, and policy levers that inhibit a market’s ability to recognize an asset’s intrinsic value, whether in terms of financial, social, or human capital, and (b) explores and advances interdisciplinary corporate governance theories by employing a heterodox economic analytic to derive its proposal to the paradox of an unregulated virtual currency market (Bitcoins) and an overly regulated crowdfunding market (Kickstarter). The Article functions not only as an homage to Charles MacKay’s legendary 1841 book, Extraordinary Popular Delusions and the Madness of Crowds, which described the human, social, and economic psychology of financial bubbles—particularly the Dutch tulip bulb bubble—but also as an offering of problems and proposals that crowdfunded and Kickstarted entrepreneurial businesses, including those funded by Bitcoin currencies, present for a wide swath of societal stakeholders. To describe the problem, this Article (i) describes behavioral finance, (ii) details the new entrepreneurial business possibilities that virtual currencies and crowdfunded entities can explore, (iii) describes how current rules and regulations represent unnecessary constraints to traditional equity-based funding models and concerning governance models of entrepreneurial enterprises, and (iv) questions why one form of capital deployment (currencies) may provide equity-like returns and unique governance, while the other form of investing (crowdfunding), provides only softdollar-like returns and no governance for middle-class investors. While both virtual currencies and crowdfunding represent risks, including economic bubble risk, this Article believes that a heterodox economic analysis demonstrates unnecessary constraints on entrepreneurial businesses imposed by extant regulation, regulators, law, and policymakers. To assuage these paradoxic problems for emerging business enterprises, this Article proposes a minarchist heterodox solution of modest statutory language that requires market-based solutions that employ needed risk reduction strategies while redeploying necessary capital to private startup business enterprises. This proposal thus benefits the middle class entrepreneurs, suppliers of capital, and job seekers harmed by the current regulatory regime, while permitting for an expansion of the U.S. and global economies

GEM: a Distributed Goal Evaluation Algorithm for Trust Management

Trust management is an approach to access control in distributed systems where access decisions are based on policy statements issued by multiple principals and stored in a distributed manner. In trust management, the policy statements of a principal can refer to other principals' statements; thus, the process of evaluating an access request (i.e., a goal) consists of finding a "chain" of policy statements that allows the access to the requested resource. Most existing goal evaluation algorithms for trust management either rely on a centralized evaluation strategy, which consists of collecting all the relevant policy statements in a single location (and therefore they do not guarantee the confidentiality of intensional policies), or do not detect the termination of the computation (i.e., when all the answers of a goal are computed). In this paper we present GEM, a distributed goal evaluation algorithm for trust management systems that relies on function-free logic programming for the specification of policy statements. GEM detects termination in a completely distributed way without disclosing intensional policies, thereby preserving their confidentiality. We demonstrate that the algorithm terminates and is sound and complete with respect to the standard semantics for logic programs.Comment: To appear in Theory and Practice of Logic Programming (TPLP

Beyond Financial Regulation of Crypto-asset Wallet Software: In Search of Secondary Liability

Since Bitcoin, the blockchain space considerably evolved. One crucial piece of software to interact with blockchains and hold private-public key pairs to distinct crypto-assets and securities are wallets. Wallet software can be offered by liable third-parties (‘custodians’) who hold certain rights over assets and transactions. As parties subject to financial regulation, they are to uphold Anti-money Laundering and Combating the Financing of Terrorist (AML/CFT) standards by undertaking Know-Your-Customer (KYC) checks on users of their services. In juxtaposition, wallet software can also be issued without the involvement of a liable third-party. As no KYC is performed and users have full ‘freedom to act’, such ‘non-custodial’ wallet software is popular in criminal undertakings. They are required to interact with peer-to-peer applications and organisations running on blockchains whose benefits are not the subject of this paper. To date, financial regulation fails to adequately address such wallet software because it presumes the existence of a registered, liable entity offering said software. As illustrated in the case of Tornado Cash, financial regulation fails to trace chains of secondary liability. Alas, the considered solution is a systematic surveillance of all transactions. Against this backdrop, this paper sets forth an alternative approach rooted in copyright law. Concepts that pertain to secondary liability prove of value to develop a flexible, principles-based approach to the regulation of non-custodial wallet software that accounts for both, infringing and non-infringing uses

Blockchain Technology and Smart Universities

Abstract: The objective of this paper is to conduct a conceptual assessment of blockchain technology applications to universities. The paper will first address two related questions namely, the concept of smart university, and the architecture of blockchain technology. This paper contributes towards the topical debate of whether the claimed blockchain technological transformation is a hype, reality, revolution, or just an ordinary computing upgrade. It follows that if blockchain is a significant technological advancement then it can only be ignored at own’s peril. This research should benefit innovation policy decisions in the academia for out-of-the box thinking regarding internal control systems and product offering for smart universities

Crypto-currency and blockchain: the revolution of the world economic system and digital identities

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Advances in Crowdfunding: Research and Practice

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