Method, apparatus, and system for processing two-dimensional barcodes

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

• receiving an electronic credential request from a client, wherein the electronic credential request comprises a user identifier;
• retrieving an electronic credential that corresponds to the user identifier;
• generating server signature information, wherein the server signature information comprises the electronic credential and a user public key of the client, and wherein the electronic credential and the user public are signed using a server private key;
• and
• transmitting the server signature information and the electronic credential to the client, wherein the server signature information is configured to be cryptographically verified by the client and configured to enable the client to generate a two-dimensional barcode based on the electronic credential, wherein the electronic credential included in the two-dimensional barcode is configured to be verified by a credential verification device, and wherein the credential verification device is configured to generate the electronic credential based on the user identifier.

A computer-implemented system, comprising:

• one or more computers;
• and
• one or more computer memory devices interoperably coupled with the one or more computers and having tangible, non-transitory, machine-readable media storing one or more instructions that, when executed by the one or more computers, perform one or more operations comprising:
• receiving an electronic credential request from a client, wherein the electronic credential request comprises a user identifier;
• retrieving an electronic credential that corresponds to the user identifier;
• generating server signature information, wherein the server signature information comprises the electronic credential and a user public key of the client, and wherein the electronic credential and the user public are signed using a server private key;
• and
• transmitting the server signature information and the electronic credential to the client, wherein the server signature information is configured to be cryptographically verified by the client and configured to enable the client to generate a two-dimensional barcode based on the electronic credential, wherein the electronic credential included in the two-dimensional barcode is configured to be verified by a credential verification device, and wherein the credential verification device is configured to generate the electronic credential based on the user identifier.