An audio encryption method based on quaternary logic operations.

Area of Science:

• Cryptography
• Digital Signal Processing
• Computer Engineering

Background:

• Audio data's inherent correlation between adjacent samples poses challenges for encryption.
• Existing audio encryption methods often sacrifice efficiency for security due to complex algorithms.

Purpose of the Study:

• To propose a novel, efficient, and secure audio encryption method.
• To enhance audio data protection against various attacks.

Main Methods:

• Combining quaternary logic operations with MixColumns operations for encryption.
• Implementing dual encryption to resist statistical attacks.
• Analyzing key sensitivity and calculating security indicators (key space, sample change rate, etc.).

Main Results:

• The proposed method demonstrates higher security and faster encryption/decryption speeds compared to existing methods.
• Security indicators, including key space and diffusion effects, are superior.
• Achieves high encryption speeds (0.000257 s/KB in C++) and efficient FPGA implementation (363.6 MHz).

Conclusions:

• The novel audio encryption method offers a significant improvement in both security and efficiency.
• It provides a robust solution for protecting audio data, outperforming established algorithms like AES and Ascon.
• The method's speed and low resource consumption make it suitable for practical applications, especially on hardware platforms.