Design of encrypted call system based on secure and convenient encryption chip
By studying the security status quo of voice call system and the security of key storage,this paper designs an encrypted call system based on a secure and convenient encryption chip.The secure and convenient encryption chip is used to securely store the key and realise the functions of encryption,decryption,signature verification and so on,and the secure middleware is used to realise the secure transmission of data between the client and the secure and convenient encryption chip.The system takes PKI security system as the core of design,and in the process of voice encryption,the state secret SM2 algorithm is used to synchronise the key in the form of digital envelopes;the Opus coding algorithm is used to compress and encode the audio data first to reduce the transmission bandwidth;and then the encoded audio data is encrypted by the key in SM4 to achieve the transmission of the ciphertext to ensure the real-time and security of the voice call process.The results of performance testing and security analysis show that the system greatly improves the security of the user's call process while ensuring the smoothness of the call,and has a better application prospect.
secure and convenient encryption chipnational encryption algorithmsecure middlewareOpus codevoice encryption
万方数据
维普
