This disclosure relates to account management. In one aspect, a method includes receiving a permission query message from a service system. Verification information is obtained from a first client based on the permission query message. The verification information is associated with an identity of the current user. In response to determining that the verification information is valid, proxy permission information for the current user is obtained from a blockchain. The proxy permission information includes at least operation permission information of the current user for the enterprise account. The proxy permission information is sent to the service system. The proxy permission information configured to be usable by the service system to determine whether to authorize the current user to perform an operation on the enterprise account.