Cryptology ePrint Archive: Report 2014/336
Private Predictive Analysis on Encrypted Medical Data
Joppe W. Bos and Kristin Lauter and Michael Naehrig
Abstract: Increasingly, confidential medical records are being stored in data centers hosted by hospitals or large companies. As sophisticated algorithms for predictive analysis on medical data continue to be developed, it is likely that, in the future, more and more computation will be done on private patient data. While encryption provides a tool for assuring the privacy of medical information, it limits the functionality for operating on such data. Conventional
encryption methods used today provide only very restricted possibilities or none at all to operate on encrypted data without decrypting it first. Homomorphic encryption provides a tool for
handling such computations on encrypted data, without decrypting the data, and without even needing the decryption key.
In this paper, we discuss possible application scenarios for homomorphic encryption in order to ensure privacy of sensitive medical data. We describe how to privately conduct predictive analysis tasks on encrypted data using homomorphic encryption. As a proof of concept, we present a working implementation of a prediction service running in the cloud (hosted on Microsoft's Windows Azure), which takes as input private encrypted health data, and returns the probability of suffering cardiovascular disease in encrypted form. Since the cloud service uses homomorphic encryption, it makes this prediction while handling only encrypted data, learning nothing about
the submitted confidential medical data.
Category / Keywords: applications / homomorphic encryption
Original Publication (in the same form): Journal of Biomedical Informatics
Date: received 13 May 2014
Contact author: klauter at microsoft com
Available format(s): PDF | BibTeX Citation
Version: 20140515:063021 (All versions of this report)
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