This paper takes up the problem of understanding why we preserve some things passionately and discard others without thought. We briefly report on the theoretical literature relating to this question, both in terms of existing literature in HCI, as well as in terms of related literatures that can advance the understanding for the HCI community. We use this reading to refine our frameworks for understanding durability in digital artifice as an issue of sustainable interaction design in HCI. Next, we report in detail on our ongoing work in collecting personal inventories of digital artifice in the home context. We relate our prior and most current personal inventories collections to the framework that owes to our reading of the theoretical literature. Finally, we summarize the theoretical implications and findings of our personal inventories work in terms of implications for the design of digital artifice in a manner that is more durable.

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By its nature, the discipline of human computer interaction must take into consideration the issues that are most pertinent to humans. We believe that the CHI community faces an unanswered challenge in the creation of interactive systems: environmental sustainability. For example, climate scientists argue that the most serious consequences of climate change can be averted, but only if fundamental changes are made. The goal of this SIG is to raise awareness of these issues in the CHI community and to start a conversation about the possibilities and responsibilities we have to address issues of sustainability.

Interactive devices and the services they support are reliant on the cloud and the digital infrastructure supporting it. The environmental impacts of this infrastructure are substantial-and for particular services the infrastructure can account for up to 85% of the total impact. In this paper, we apply the principles of Sustainable Interaction Design to cloud services use of the digital infrastructure. We perform a critical analysis of current design practice with regard to interactive services, which we identify as the cornucopian paradigm. We show how user-centered design principles induce environmental impacts in different ways, and combine with technical and business drivers to drive growth of the infrastructure through a reinforcing feedback cycle. We then create a design rubric, substantially extending that of Blevis [6], to cover impacts of the digital infrastructure. In doing so, we engage in design criticism, identifying examples (both actual and potential) of good and bad practice. We then extend this rubric beyond an ecoefficiency paradigm to consider deeper and more radical perspectives on sustainability, and finish with future directions for exploration.

Abstract. This paper reports the highlights of a user study which gauges reactions to a variety of common "trust indicators" -such as logos, third party endorsements, and padlock icons -over a selection of authentic and phishing stimuli. In the course of the think-aloud protocol, participants revealed different sensitivities to email messages and web pages. Our principal result is the analysis of what makes phishing emails and web pages appear authentic. This is not only of interest from a pure scientific point of view, but can also guide the design of legitimate material to avoid unnecessary risks. A second result of ours are observations of what makes legitimate content appear dubious to consumers. This is a result with obvious applications to online advertising.