Data synchronization method and device, electronic equipment and storage medium

The invention relates to a data synchronization method and device, electronic equipment and a storage medium. The method comprises the following steps: after password data of a first password lock in the intelligent door lock is updated, determining priorities of updated password data and synchronization time corresponding to different priorities according to an attribute of a second password lock, a type of the updated password data and/or a user attribute of the updated password data; at the synchronization time corresponding to the priority, the first password lock encrypts the updated password data of the corresponding priority by using a first private key of the first password lock and a first public key of the second password lock to obtain a first target password file; synchronizing the first target password file to a second password lock through the first password lock, and obtaining a second public key of the first password lock and a second private key of the second password lock through the second