A Non-Custodial Wallet for CBDC: Design Challenges and Opportunities

Central Bank Digital Currency (CBDC) is a novel form of money that could be issued and regulated by central banks, offering benefits such as programmability, security, and privacy. However, the design of a CBDC system presents numerous technical and social challenges. This paper presents the design and prototype of a non-custodial wallet, a device that enables users to store and spend CBDC in various contexts. To address the challenges of designing a CBDC system, we conducted a series of workshops with internal and external stakeholders, using methods such as storytelling, metaphors, and provotypes to communicate CBDC concepts, elicit user feedback and critique, and incorporate normative values into the technical design. We derived basic guidelines for designing CBDC systems that balance technical and social aspects, and reflect user needs and values. Our paper contributes to the CBDC discourse by demonstrating a practical example of how CBDC could be used in everyday life and by highlighting the importance of a user-centred approach.Comment: 25 pages, 12 figure

Enacting the last mile:Experiences of smart contracts in courier deliveries

Smart contract systems could change the nature of last-mile delivery for the better through enhanced precision, coordination and accountability. However, technological complexity poses a challenge for end-users participating in the design process, making it hard to explore their experiences and incorporate their perspectives. We describe a case study where technological prototypes create smart contract experiences for professional couriers and receptionists, allowing them to speculate about emerging possibilities, whilst remaining grounded in their current practices. Participants enacted a series of deliveries, choreographed by smart contracts, and their responses were explored in post-experience, one-to-one interviews. Working with professionals to explore the potential impact of smart contract technologies, revealed the systemic webs of value underlying their existing work practices. This has implications for design of such technologies, in which increased automation, efciency and accountability must be delicately balanced with the benefts of sustaining personal values, relationships and agency.</p

Creating resources for designing with and for care ecologies in HCI

Amidst a growing body of work in HCI focusing on designing systems that engage with care relationships, there is increasing interest in expanding notions of care beyond transactional practices towards broader notions of “care ecologies”. However, there is still work needed to support care systems designers apply these concepts in practice. This paper presents the Care Spectrums, a set of sensitising concepts for designers to explore and apply to their practice. Developed as a response to a design probe exercise (the CareTree) which was carried out with 14 participants over one month, the Care Spectrums respond to the multiplicity of expressions of care in participants’ everyday lives. Translated into a design resource (the ‘Co-Designing with Care’ card deck), and trialled with 10 designers, the Care Spectrums revealed hidden caring and uncaring practices in designers projects, and stimulated opportunities for designing with and for people’s complex and entangled care ecologies

Learning from creative biology:Promoting transdisciplinarity through vocabularies of practice

Transdisciplinary ways of collaborating are considered essential to support the generation of new approaches to tackling societal and environmental “wicked” problems. But how can collaborations take place in ways that reach this envisioned state? In this work, we look for cues of transdisciplinarity in the experience of those with a successful track record of working across disciplines. We investigate the experience of 69 practitioners and researchers working in “creative biology”, an umbrella term that we use to address work that incorporates biology-related methods and research outside purely scientific realms. Our study provides insights into how language is often used to support strategic shifts of positionality and nudge others to step out of their disciplinary realms, contributing examples that can help expand the discussion of transdisciplinarity in Design

Enacting the Last Mile: Experiences of Smart Contracts in Courier Deliveries

Smart contract systems could change the nature of last-mile deliv- ery for the better through enhanced precision, coordination and accountability. However, technological complexity poses a chal- lenge for end-users participating in the design process, making it hard to explore their experiences and incorporate their perspectives. We describe a case study where technological prototypes create smart contract experiences for professional couriers and receptionists, allowing them to speculate about emerging possibilities, whilst remaining grounded in their current practices. Participants enacted a series of deliveries, choreographed by smart contracts, and their responses were explored in post-experience, one-to-one interviews. Working with professionals to explore the potential impact of smart contract technologies, revealed the systemic webs of value underlying their existing work practices. This has implications for design of such technologies, in which increased automation, efciency and accountability must be delicately balanced with the benefts of sustaining personal values, relationships and agency.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Human Information Communication Desig