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Title:
Private Genome Analysis through Homomorphic Encryption
Authors: Miran Kim, Kristin Lauter
Abstract:The rapid development of genome sequencing technology allows researchers to access large genome datasets. However, outsourcing the data processing to the cloud poses high risks for personal privacy. The aim of this paper is to give a practical solution for this problem using homomorphic encryption. In our approach, all the computations can be performed in an untrusted cloud without requiring the decryption key or any interaction with the data owner, which preserves the privacy of genome data. In this paper, we present evaluation algorithms for secure computation of the minor allele frequencies and chi-squared statistic in a genome-wide association studies setting. We also describe how to privately compute the Hamming distance and approximate Edit distance between encrypted DNA sequences. Finally, we compare performance details of using two practical homomorphic encryption schemes - the BGV scheme by Gentry, Halevi and Smart and the YASHE scheme by Bos, Lauter, Loftus and Naehrig. Such an approach with the YASHE scheme analyzes data from 400 people within about 2 seconds and picks a variant associated with disease from 311 spots. For another task, using the BGV scheme, it took about 65 seconds to securely compute the approximate Edit distance for DNA sequences of size 5K and figure out the differences between them.
ePrint: https://eprint.iacr.org/2015/965
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