Abstract: Duplicated packet transmission methods are provided. The duplicated packet transmission method may include the following steps. A sender may determine whether to pad at least one duplicated packet into a multi-user physical-protocol-data-unit (MU-PPDU) based on at least one condition. Then, the sender may transmit the MU-PPDU with the duplicated packet to at least one receiver when the condition is met.

Abstract: An identity verification method applied in a computer device includes periodically collecting biometric data of a user. A difference between the collected biometric data and pre-stored biometric data is determined. The pre-stored biometric data is updated to be the collected biometric data, and the collected biometric data and identification information of the user are uploaded to a blockchain when the difference is greater than a preset threshold. Once current biometric data of the user is obtained, and the identification information of the user from the blockchain based on the current biometric data of the user is downloaded, identity verification is performed on the user based on the downloaded identification information.