diǎn duì diǎn jiā mì / néng / què bǎo / xiāo xī / zhǐ yǒu / shōu fā / shuāng fāng / néng gòu / yuè dú点对点加密能确保消息只有收发双方能够阅读。End-to-end encryption ensures that only the sender and receiver can read the message.