Differential privacy and Emoji

«The differential privacy technology used by Apple is rooted in the idea that statistical noise that is slightly biased can mask a user’s individual data before it is shared with Apple. If many people are submitting the same data, the noise that has been added can average out over large numbers of data points, and Apple can see meaningful information emerge».

Source : Apple Says ‘Face With Tears of Joy’ is Most Popular Emoji in United States Among English Speakers – Mac Rumors