Abstract
This chapter introduces schemes for anonymous statistics calculations, in which an entity or a set of entities calculate functions of data owned by other entities without knowing their values. Although schemes that can be applied to calculate general functions exist, they are not practical enough, therefore schemes applicable only to limited number of functions, e.g. averages, variances, auto-, and cross-correlations are discussed. They are blind sum/product calculation schemes, partial computation based multi party computation schemes, and re-encryption based multi party computation schemes.