Confidence leakage protection method and device

The invention discloses a confidence leakage protection method, comprising steps of broadcasting related frame or data frames when a monitoring terminal is connected to an illegal AP, obtaining terminal characteristics of the terminal according to the related frame and the data frame, detecting whether the terminal characteristics exist in a preset terminal characteristic database, if yes, performing the leakage protection on the terminal. In leakage protection method, because the terminal characteristic database stores terminal characteristics of the terminal which is connected to the legal AP, so that the confidence leakage protection can be only applied on the terminal of the terminal characteristic database, and the confidence leakage protection is not performed on the terminal which is not in he terminal characteristic database without affecting the illegal connection with the AP by the terminal which is not in the terminal characteristic database. The invention does not affect the connection with the AP by the terminals of the other enterprise, and reduces the misjudgment.