Publication Type
Journal Article
Version
publishedVersion
Publication Date
4-2021
Abstract
Built-in pervasive cameras have become an integral part of mobile/wearable devices and enabled a wide range of ubiquitous applications with their ability to be "always-on". In particular, life-logging has been identified as a means to enhance the quality of life of older adults by allowing them to reminisce about their own life experiences. However, the sensitive images captured by the cameras threaten individuals' right to have private social lives and raise concerns about privacy and security in the physical world. This threat gets worse when image recognition technologies can link images to people, scenes, and objects, hence, implicitly and unexpectedly reveal more sensitive information such as social connections. In this paper, we first examine life-log images obtained from 54 older adults to extract (a) the artifacts or visual cues, and (b) the context of the image that influences an older life-logger's ability to recall the life events associated with a life-log image. We call these artifacts and contextual cues "stimuli". Using the set of stimuli extracted, we then propose a set of obfuscation strategies that naturally balances the trade-off between reminiscability and privacy (revealing social ties) while selectively obfuscating parts of the images. More specifically, our platform yields privacy-utility tradeoff by compromising, on average, modest 13.4% reminiscability scores while significantly improving privacy guarantees -- around 40% error in cloud estimation.
Keywords
wearable cameras, memory augmentation, social network inference
Discipline
Graphics and Human Computer Interfaces
Research Areas
Data Science and Engineering
Publication
Proceedings of the ACM on Human-Computer Interaction
Volume
5
Issue
CSCW2
First Page
1
Last Page
32
ISSN
2573-0142
Identifier
10.1145/3476047
Publisher
Association for Computing Machinery (ACM)
Citation
KANDAPPU, Thivya; SUBBARAJU, Vigneshwaran; and XU, Qianli.
PrivacyPrimer: Towards privacy-preserving Episodic memory support for older adults. (2021). Proceedings of the ACM on Human-Computer Interaction. 5, (CSCW2), 1-32.
Available at: https://ink.library.smu.edu.sg/sis_research/6748
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