摘要
在STM32平台上采用TEA微型加密算法实现了数字加密录音笔的设计,其中模拟音频信号通过低通滤波器和放大器处理后,进行A/D转换和ADPCM编码,STM32主控制器对编码数据进行加密以及存储操作。同时通过对加密录音笔进行测试和分析,表明系统录音过程稳定可靠、加密效果良好,且达到了设计要求。
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.
出处
《电子科技》
2014年第6期58-61,65,共5页
Electronic Science and Technology
