METHOD FOR DEPERSONALISING PERSONAL DATA Russian patent published in 2022 - IPC G06F21/62 H04L9/00 

FIELD: data processing.

SUBSTANCE: invention relates to a method for depersonalising structured personal data. Method includes representing the data as a pre-compiled source table, wherein each row contains personal data of a single subject divided into a set of attributes corresponding to the structural units of the personal data; and converting each attribute of the source table in multiple stages, including dividing the set of elements of the attribute into blocks and permuting the blocks at each stage, wherein the composition and order of the intrablock data do not change in the course of the conversions; multiple conversion keys for all stages of conversion of each attribute are formed and stored on the server, wherein each key contains the number of blocks at each stage, the vector of elements in each block, and the permutation matrix at each stage; wherein the attributes of the source table are converted using the set conversion keys for each attribute so that the number of blocks for each attribute and the number of elements in each block are unique for each attribute and for each stage.

EFFECT: higher security of personal data.

8 cl, 2 tbl