Authorization method and device for joint account, and authentication method and device for joint account

A computer-implemented method, comprising:

• obtaining N joint management authentication parameters of a joint account wherein each of the N joint management authentication parameters comprises a corresponding part of a private key and a corresponding sequence number different from other sequence numbers, and wherein the joint account is jointly managed by N joint managers, and wherein N is a natural number greater than 1;
• restoring one part of a user-side authentication parameter based on each joint management authentication parameter;
• combining, according to each corresponding sequence number, N parts of the private key into the user-side authentication parameter;
• and
• initiating an authentication request using the user-side authentication parameter, wherein a server performs authentication on operation permission for the joint account based on a network-side authentication parameter, wherein the network-side authentication parameter is the public key that corresponds to the user-side authentication parameter.

A non-transitory, computer-readable medium storing one or more instructions executable by a computer system to perform operations comprising:

• obtaining a user-side authentication parameter of a joint account, wherein the joint account is jointly managed by N joint managers, wherein N is a natural number greater than 1, and wherein the user-side authentication parameter is a private key that corresponds to a public key that is a network-side authentication parameter of the joint account, wherein the user-side authentication parameter is used to perform authentication on operation permissions for the joint account;
• dividing the private key that is the user-side authentication parameter into N parts;
• generating a different corresponding sequence number for each part of the N parts of the private key;
• generating a corresponding joint management authentication parameter for each part of the N parts of the private key based on a corresponding part of the N parts of the private key and the different corresponding sequence number of the corresponding part of the N parts;
• and
• transmitting each of the N joint management authentication parameters to a different client device, each different client device associated with a different one of the N joint managers.