ELECTRONIC DEVICE FOR SPEECH SECURITY WITH LESS ENVIRONMENTAL SOUND DISTORTION AND OPERATING METHOD THEREOF

An electronic device and an operating method thereof according to various example embodiments may be configured to acquire video data and audio data, to scramble audio data of a time interval (ΔT) in non-time order, and to store the video data and the scrambled audio data together. According to an example embodiment, the time interval (ΔT) may be fixed to be the same with respect to continuous audio data. According to another example embodiment, the time interval (ΔT) may vary using a function of receiving an input of a secret key and order and outputting a unique value, such as a Hash-based Message Authentication Codes (HMAC)-based One-time Password (HOTP) algorithm.