版本4加入私用通道，传输用来签署密码编译金钥和讯息的数位签章。

Version 4 adds a private channel to transmit a digital signature to sign cryptographic keys and messages.

youdao

版本4加入私用通道，传输用来签署密码编译金钥和讯息的数位签章。

Version 4 adds a private channel to transmit a digital signature to sign cryptographic keys and messages.

youdao