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- Angulo, Julio, 1980-
(författare)
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Designing for Usable Privacy and Transparency in Digital Transactions
- 2015
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- People engage with multiple online services and carry out a range of different digital transactions with these services. Registering an account, sharing content in social networks, or requesting products or services online are a few examples of such digital transactions. With every transaction, people take decisions and make disclosures of personal data. Despite the possible benefits of collecting data about a person or a group of people, massive collection and aggregation of personal data carries a series of privacy and security implications which can ultimately result in a threat to people's dignity, their finances, and many other aspects of their lives. For this reason, privacy and transparency enhancing technologies are being developed to help people protect their privacy and personal data online. However, some of these technologies are usually hard to understand, difficult to use, and get in the way of people's momentary goals.The objective of this thesis is to explore, and iteratively improve, the usability and user experience provided by novel privacy and transparency technologies. To this end, it compiles a series of case studies that address identified issues of usable privacy and transparency at four stages of a digital transaction, namely the information, agreement, fulfilment and after-sales stages. These studies contribute with a better understanding of the human-factors and design requirements that are necessary for creating user-friendly tools that can help people to protect their privacy and to control their personal information on the Internet.
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- Angulo, Julio, 1980-, et al.
(författare)
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Exploring Touch-Screen Biometrics for User Identification on Smart Phones
- 2011
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Ingår i: Privacy and Identity Managementfor Life. - Berlin, Heidelberg : Springer. - 9783642316678 - 9783642316685 ; , s. 130-143
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Konferensbidrag (refereegranskat)abstract
- The use of mobile smart devices for storing sensitive informationand accessing online services is increasing. At the same time, methods for authenticating users into their devices and online services that are not only secure, but also privacy and user-friendly are needed. In this paper, we present our initial explorations of the use of lock pattern dynamics as a secure and user-friendly two-factor authentication method. We developed an application for the Android mobile platform to collect data on the way individuals draw lock patterns on a touchscreen. Using a Random Forest machine learning classier this method achieves an average Equal Error Rate (EER) of approximately 10.39%, meaning that lock patterns biometrics can be used for identifying users towards their device, but could also pose a threat to privacy if the users' biometric information is handled outside their control.
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- Angulo, Julio, 1980-, et al.
(författare)
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HCI for Policy Display and Administration
- 2011. - 1
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Ingår i: Privacy and Identity Management for Life. - Berlin : Springer Berlin/Heidelberg. - 9783642203176 ; , s. 261-277
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Bokkapitel (refereegranskat)abstract
- The PrimeLife Policy Language (PPL) has the objective of helping end users make the data handling practices of data controllers more transparent, allowing them to make well-informed decisions about the release of personal data in exchange for services. In this chapter, we present our work on user interfaces for the PPL policy engine, which aims at displaying the core elements of a data controller's privacy policy in an easily understandable way as well as displaying how far it corresponds with the user's privacy preferences. We also show how privacy preference management can be simplified for end users.
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- Angulo, Julio, 1980-, et al.
(författare)
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Identity Management through “Profiles” : Prototyping an Online Information Segregation Service
- 2013
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Ingår i: Human-Computer Interaction. Users and Contexts of Use. - Berlin, Heidelberg : Springer Berlin/Heidelberg. - 9783642392641 - 9783642392658 ; , s. 10-19
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Konferensbidrag (refereegranskat)abstract
- Whereas in real everyday life individuals have an intuitive approach at deciding which information to disseminate to others, in the digital world it becomes difficult to keep control over the information that is distributed to different online services. In this paper we present the design of a user interface for a system that can help users decide which pieces of information to distribute to which type of service providers by allowing them to segregate their information attributes into various personalized profiles. Iterative usability evaluations showed that users understand and appreciate the possibility to segregate information, and revealed possible improvements, implications and limitations of such an interface.
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- Angulo, Julio, 1980-, et al.
(författare)
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Towards Usable Privacy Policy Display & Management
- 2012
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Ingår i: Information Management & Computer Security. - Bingley, UK : Emerald Group Publishing Limited. - 0968-5227. ; 20, s. 4-17
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Tidskriftsartikel (refereegranskat)abstract
- This paper discusses the approach taken within the PrimeLife project for providing user-friendly privacy policy interfaces for the PrimeLife Policy Language (PPL).We present the requirements, design process and usability testing of the “Send Data?” prototype, a browser extension designed and developed to deal with the powerful features provided by PPL. Our interface introduces the novel features of “on the fly” privacy management, predefined levels of privacy settings, and simplified selectionof anonymous credentials. Results from usability tests showed that users understand and appreciate these features and perceive them as being privacy-friendly, and they are therefore suggested as a good approach towards usable privacy policy display and management. Additionally, we present our lessons learnt in the design process of privacy policy interfaces.
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| 10. |
- Angulo, Julio, 1980-, et al.
(författare)
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Understanding the user experience of secure mobile online transactions in realistic contexts of use
- 2012
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Ingår i: Symposium on Usable Privacy and Security (SOUPS) 2012. - Washington D.C.,USA : Association for Computing Machinery (ACM). ; , s. 8-
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Konferensbidrag (refereegranskat)abstract
- Possible attacks on mobile smart devices demand higher security for applications handling payments or sensitive information. The introduction of a tamper-proof area on future generations of mobile devices, called Trusted Execution Environment (TEE), is being implemented. Before devices with embedded TEEs can be deployed to the public, investigations on usability aspects of Trusted User Interfaces (TUI) are needed. This article describes the process we have followed at gathering requirements, prototyping and testing suitable designs for TUIs in combination with a touch-screen biometric system. At the end, we present relevant findings of a pilot study that we have conducted using an Experience Sampling Method (ESM) as part of our ongoing work.
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