Prior research in smart home privacy highlights significant issues with how users understand, permit, and consent to data use. Some of the underlying issues point to unclear data protection regulations, lack of design principles, and dark patterns. In this paper, we explore heuristics (also called “mental shortcuts” or “rules of thumb”) as a means to address security and privacy design challenges in smart homes. First, we systematically analyze an existing body of data on smart homes to derive a set of heuristics for the design of consent and permission. Second, we apply these heuristics in four participatory co-design workshops (n = 14) and report on their use. Third, we analyze the use of the heuristics through thematic analysis highlighting heuristic application, purpose, and effectiveness in successful and unsuccessful design outcomes. We conclude with a discussion of the wider challenges, opportunities, and future work for improving design practices for consent in smart homes.

In spite of research recognizing the home as a shared space and privacy as inherently social, privacy in smart homes has mainly been researched from an individual angle. Sometimes contrasting and comparing perspectives of multiple individuals, research has rarely focused on how household members might use devices communally to achieve common privacy goals. An investigation of communal use of smart home devices and its relationship with privacy in the home is lacking. The paper presents a grounded analysis based on a synergistic relationship between an ethnomethodologically-informed (EM-informed) study and a grounded theory (GT) approach. The study focuses on household members’ interactions to show that household members’ ability to coordinate the everyday use of their devices depends on appropriate conceptualizations of roles, rules, and privacy that are fundamentally different from those embodied by off-the-shelf products. Privacy is rarely an explicit, actionable, and practical consideration among household members, but rather a consideration wrapped up in everyday concerns. Roles and rules are not used to create social order, but to account for it. To sensitize to this everyday perspective and to reconcile privacy as wrapped up in everyday concerns with the design of smart home systems, the paper presents the social organization of communal use as a descriptive framework. The framework is descriptive in capturing how households navigate the ‘murky waters’ of communal use in practice, where prior research highlighted seemingly irreconcilable differences in interest, attitude, and aptitude between multiple individuals and with other stakeholders. Discussing how households’ use of roles, rules, and privacy in-practice differed from what off-the-shelf products afforded, the framework highlights critical challenges and opportunities for the design of communal privacy experiences.

Smart home products aren’t living up to their promise. They claim to transform the way we live, providing convenience, energy efficiency, and safety. However, the reality is significantly less profound and often frustrating. This is particularly apparent in security and privacy experiences: powerlessness, confusion, and annoyance have all been reported.

Connected devices in the home represent a potentially grave new privacy threat due to their unfettered access to the most personal spaces in people's lives. Prior work has shown that despite concerns about such devices, people often lack sufficient awareness, understanding, or means of taking effective action. To explore the potential for new tools that support such needs directly we developed Aretha, a privacy assistant technology probe that combines a network disaggregator, personal tutor, and firewall, to empower end-users with both the knowledge and mechanisms to control disclosures from their homes. We deployed Aretha in three households over six weeks, with the aim of understanding how this combination of capabilities might enable users to gain awareness of data disclosures by their devices, form educated privacy preferences, and to block unwanted data flows. The probe, with its novel affordances-and its limitations-prompted users to co-adapt, finding new control mechanisms and suggesting new approaches to address the challenge of regaining privacy in the connected home.