This is the unspecified version of the paper.This version of the publication may differ from the final published version. Permanent repository link:http://openaccess.city.ac.uk/3734/ Link to published version: http://dx.doi.org/10.1109/ COMST.2014.2320093 Copyright and reuse: City Research Online aims to make research outputs of City, University of London available to a wider audience. Copyright and Moral Rights remain with the author(s) and/or copyright holders. URLs from City Research Online may be freely distributed and linked to. City Research Online: http://openaccess.city.ac.uk/ publications@city.ac.ukCity Research Online Abstract-The electricity industry is now at the verge of a new era. An era that promises, through the evolution of the existing electrical grids to Smart Grids, more efficient and effective power management, better reliability, reduced production costs and more environmentally friendly energy generation. Numerous initiatives across the globe, led by both industry and academia, reflect the mounting interest around the enormous benefits but also the great risks introduced by this evolution. This paper focuses on issues related to the security of the Smart Grid and the Smart Home, which we present as an integral part of the Smart Grid. Based on several scenarios we aim to present some of the most representative threats to the Smart Home / Smart Grid environment. The threats detected are categorized according to specific security goals set for the Smart Home/Smart Grid environment and their impact on the overall system security is evaluated. A review of contemporary literature is then conducted with the aim of presenting promising security countermeasures with respect to the identified specific security goals for each presented scenario. An effort to shed light on open issues and future research directions concludes the paper. Index Terms-Smart Grids, Smart Homes, Security, Countermeasures, Challenges I. INTRODUCTIONThe electric power infrastructure as we know it today has managed to serve our needs successfully, almost unchanged, for nearly a century; revolutionizing almost every aspect of our lives. However, as this infrastructure is inevitably aging it becomes increasingly less efficient, repeatedly running up against its limitations and constantly straining to keep up with our ever-increasing requirements. Needs for reliability, scalability, manageability, environmentally friendly energy generation, interoperability and cost effectiveness, bring forward the necessity for a modernized and intelligent grid for tomorrow; a new, reliable, efficient, flexible and secure energy infrastructure, known as the Smart Grid [1].Through the incorporation of advanced power system electronics, networking and communication technologies the Smart Grid is envisioned to significantly enhance the existing electric grid. Allowing for more accurate real-time monitoring, ensuring the optimization of power flows and enabling for two-way communication between the utility and customer sides while pointing th...
To prevent password breaches and guessing attacks, banks increasingly turn to two-factor authentication (2FA), requiring users to present at least one more factor, such as a one-time password generated by a hardware token or received via SMS, besides a password. We can expect some solutionsespecially those adding a token -to create extra work for users, but little research has investigated usability, user acceptance, and perceived security of deployed 2FA. This paper presents an in-depth study of 2FA usability with 21 UK online banking customers, 16 of whom had accounts with more than one bank. We collected a rich set of qualitative and quantitative data through two rounds of semi-structured interviews, and an authentication diary over an average of 11 days. Our participants reported a wide range of usability issues, especially with the use of hardware tokens, showing that the mental and physical workload involved shapes how they use online banking. Key targets for improvements are (i) the reduction in the number of authentication steps, and (ii) removing features that do not add any security but negatively affect the user experience.
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