The use of information transfer is a major reason for the spread of information piracy, especially digital information that includes audio or other information, to preserve data. Encrypting voice messages is considered one of the most secure ways to protect information due to the difficulty of disclosing it. Our algorithm is robust, effective, efficient, and has security capabilities due to the different key lengths and block sizes (128 bits, 192 bits, or 256 bits). The Rijndael algorithm is an effective tool for encoding audio files and has won many awards. The Rijndael algorithm is compatible with many different audio formats. We will use it to encrypt WAVE files. The first step is to generate keys using the proposed method consisting of key lengths and block sizes (128 bits, 192 bits, or 256 bits). We convert the audio data into a 256 sample. After that, the cipher text will be generated for us. Once we encrypt the audio file, we will have several audio files. We will then use a proactive approach to evaluate the success of this initiative through a brute force attack to break the code. The Rijndael algorithm plays a role in this study by demonstrating the effectiveness of encryption, Reijndeal encryption, is designed to withstand brute force attacks, employs a strong key, proper encryption algorithm, secure hardware, and software to prevent side-channel attacks, and thwart cryptanalysis attempts. It also offers a cutting-edge perspective. Its primary goal is to protect data across the digital landscape during transmission, storage, and protection processes.