Підвищення стійкості методу приховування даних в аудіосигналах до стиснення MP3 на основі QIM-квантування у частотній області та шифрування ключ-блоку

Abstract

This paper presents the development of a hybrid data hiding method in audio signals aimed at ensuring robustness against lossy compression (MP3 format). An approach based on Quantization Index Modulation (QIM) in the frequency domain of the Modified Discrete Cosine Transform (MDCT) is proposed. A distinctive feature of the method is the integration of cryptographic protection for embedding parameters (key-block) using the AES-256 algorithm. The choice of the frequency domain for information embedding is justified, taking into account the MP3 psychoacoustic model. The architecture of the method is described, which includes signal pre-processing, adaptive quantization, and encryption of embedding coordinates, allowing to increase both data reliability and protection against steganalysis attacks.