| Summary: | © 2017 Informa UK Limited, trading as Taylor & Francis Group Home users are particularly vulnerable to information security threats as they must make decisions about how to protect themselves, often with little knowledge of the technology. Furthermore, information for home users tends to focus on the traditional PC and may downplay threats faced on mobile devices, transforming well-known and old risks into new challenges for information security. To address the need for more behavioural information security research that focusses on mobile devices, this paper reports on the first large-scale study comparing security perceptions and behaviours on home computer and mobile devices. Data from 629 users revealed that in addition to differences in information security behaviour, the following security-related perceptions all differ significantly between home computer and mobile device use: perceived severity, security self-efficacy, response efficacy, response cost, descriptive norm, psychological ownership and intention to perform security behaviours. In each case, the direction of the difference was such that mobile devices were more likely to be at risk than a home computer. The practical implications of these differences are discussed.
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