Enhanced Audio Encryption Scheme: Integrating Blowfish, HMAC-SHA256, and MD5 for Secure Communication
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In today's communications, it is vital to protect audio data privacy before and after transfer. This work therefore introduces the enhanced audio encryption scheme (EAES), which employs the most effective techniques of cryptography and processes them to make it impossible for unauthorized persons or programs to access or change the contents of audio files. This method uses RSA to encrypt the Blowfish key, which is used for data encryption, the HMAC-SHA256 algorithm for integrity checks, and the Message-Digest algorithm (MD5) for the checking phase. The performance of the EAES is measured statistically via the MSE, PSNR, and correlation coefficient. For the encrypted signal, the MSE was approximately 2×1072, whereas for the decrypted signal, the MSE was zero, which means that the original signal was the same as the processed signal. The PSNR for the decrypted signal was inf. The correlation coefficient test for the decrypted signal was 1, and that for the encrypted signal was 0.0006. The experimental results show that this technique can securely encrypt and decode an audio stream while maintaining its quality and being resistant to popular attacks. This method provides a dependable method of securing extremely sensitive audio data in a variety of applications that demand high security.
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