Method for training and testing obfuscation network capable of obfuscating data to protect personal information, and learning device and testing device using the same

Abstract

A method for training an obfuscation network is provided. The method includes steps of: a learning device (a) inputting training data into an obfuscation network to generate obfuscated data for training; (b) (i) inputting the obfuscated data for training into a discriminator to output a current obfuscation score for training and (ii) (ii-1) inputting first sub-data for training into a learning network to output first sub characteristic information for training and updating current updated learning parameters of the learning network to first sub updated learning parameters and (ii-2) while increasing an integer k from 2 to n, inputting k-th sub-data for training into the learning network to output k-th sub characteristic information for training and updating (k−1)-th sub updated learning parameters of the learning network to k-th sub updated learning parameters; and (c) updating previous updated obfuscation parameters of the obfuscation network to current updated obfuscation parameters.