Figure 2.
Truncating simulated data to demonstrate scaling. We plot our privacy measure PrivMAF versus the number of SNPs for simulated data with n=10000 subjects and a background population of size N=1,000,000. The green line corresponds to releasing MAFs with no rounding, the blue line to releasing MAFs rounded to three decimal digit, and the red line to releasing MAFs rounded to two decimal digits. Rounding to three digits seems to add very little to privacy, whereas rounding to two digits achieves much greater privacy gains.