Abstract:

The digital encrypted recorder is designed adopting the TEA micro encryption on the platform of STM32.The analog audio signal is processed successively by the low pass filter,the amplifier,the A/D conversion and ADPCM coding.The encoding data is encrypted and stored by The STM32 controller.Tests on the encrypted recorder show that the system is stable and reliable in recording,and that the encryption meets the design requirements with good effect.

Key words: STM32;encryption;recording