Concealment and enhancement of signal security in the audio-optical channel based on fractional Fourier amplitude and phase recovery (G-S)

Varamini, Gohar; Mazloum, Jalil; Ghoami, Alireza

Concealment and enhancement of signal security in the audio-optical channel based on fractional Fourier amplitude and phase recovery (G-S)

Document Type : Original Article

Authors

Gohar Varamini ¹

Jalil Mazloum ²

Alireza Ghoami ³

¹ Department of Electrical Engineering, Bey. C., Islamic Azad University, Beyza, Iran

² Department of Electrical Engineering Shahid Sattari Aeronautical University of Science and Technology

³ Department of Water Engineering, Shi. C., Islamic Azad University, Shiraz, Iran

Abstract

This paper examines an audio signal encoding method based on the Grachberg-Saxton phase recovery algorithm in the fractional Fourier transform domain and presents a hybrid model for providing security and data hiding in information channels. This algorithm first encodes the original audio signal into an image format and encrypts it.
This algorithm first encodes the original audio signal into an image format and encrypts it. Subsequently, the G-S phase recovery algorithm in the fractional Fourier domain is used to extract the phase information of the audio signal. Accordingly, the original audio phase is replaced with a reference phase representing the hidden information to achieve information embedding.
This technology includes the ability to generate two different types of keys according to the encryption requirements, which increases the difficulty of decryption and ensures information security.
Finally, the encrypted image can be decrypted and restored to the original audio signal. This scheme realizes the effective embedding and extraction of hidden information in audio signals through the replacement and recovery of phase information. In this scheme, information security has been significantly increased by about 98%

Keywords

"recovery algorithm"

"Grechberg-Saxton"

"information security"

" secret information"

Subjects