The person who was blackmailed in Tik Tok can find him by his personal signature. Tik Tok can see users' works by hacking each other. In Tik Tok APP, even if the other party is hacked, the other party can still watch and comment on the user's works normally. The blacked-out person can't receive the video push message from the other party, and the other party can't receive the notification message after uploading the video. In addition, after hacking the other party, the message sent by the other party to the user will be rejected, and the video uploaded by the user can still be hacked.