Design Of Voice Encryption Communication Equipment Based On Bluetooth

With the rapid development of the mobile communication industry,the application of voice communication in people,s lives has become more and more popular.At the same time,the security of voice communication has gradually attracted people's attention.Voice communication usually contains important information,such as personal privacy,trade secrets and even military secrets involving national security.If such important information is leaked,it will cause great losses to individual or collective interests.Therefore,how to ensure the security of voice communication is an urgent problem to be solved.This article is based on the above background and relies on actual research projects.Aiming at the problem of voice communication security existing in mobile communication systems,a universal encryption device for encrypting voice before the mobile terminal receives voice is designed.The principle of signal source encryption is adopted,so that the sound before entering the mobile terminal is already encrypted by the device,and the sound is decrypted by the device after the mobile terminal is decrypted,thereby ensuring that the mobile terminal is completely in the ciphertext state during the voice call,preventing the plaintext call from being illegally monitored.Eavesdropping and protecting call privacy.In this paper,Bluetooth technology is used to realize the wireless communication function with different terminal devices.The system hardware platform is built with STM32 processor as the core,and the software development tool Keil is used to complete the writing and debugging of C language code.By embedding the improved AES encryption algorithm into the hardware device,the encryption and decryption speed and anti-password attack capability of the device can be effectively improved,and the security of the voice information in the communication process is guaranteed.At the end of the paper,the software and hardware design of each part of the module is completed according to the system requirements.A complete set of voice encryption communication equipment is constructed,moreover,the function and performance of the equipment are debugged.The debugging results are analyzed and summarized simultaneously.The test results show that the Bluetooth voice encryption communication device designed in this paper has good encryption strength and decryption sound quality.The device also has strong versatility and can be applied to any mobile terminal device with Bluetooth function.It is not only suitable for voice-safe communication of the party,government and other confidential departments,but also as a kind of encryption device with good portability,versatility and low cost It also has good application value and market prospect in the civilian field.