Lifelogging technologies promise to manage many of the concerns raised by population aging. The technology can be used to predict and prevent disease, provide personalized healthcare, and to give support to formal and informal caregivers. Although lifelogging technologies offer major opportunities to improve efficiency and care in the healthcare setting, there are many aspects of these devices that raise serious privacy concerns that can undercut their use and further development. One way to manage privacy concerns raised by lifelogging technologies is through the application of Privacy by Design, an approach that involves embedding legal rules into information systems at the outset of their development. Many current approaches to Privacy by Design, however, lack methodological rigor, leaving stakeholders perplexed about how to achieve the objectives underlying the concept in practice.

This paper will explore ways to develop a Privacy by Design methodology within the context of Ambient Assistive Living (AAL) technologies like lifelogging. It will set forth a concrete, methodological approach towards incorporating privacy into all stages of a lifelogging system's development. The methodology begins with a contextual understanding of privacy, relying on theoretical and empirical studies conducted by experts in humancomputer relations. It then involves an analysis of the relevant black-letter law. A systematic approach as to how to incorporate the requisite legal rules into lifelogging devices is then presented, taking into the account the specific design elements of these kinds of systems.