Multifactor authentication service

A server, comprising:

• a memory;
• and
• a processor configured to implement a multifactor authentication service according to a process that includes:
• receiving a request at the server to launch a new session for an application on a client device;
• generating a plurality of codes, each of the plurality of codes associated with a respective identifier;
• forwarding the plurality of codes via a short messaging service (SMS) message to a user associated with the client device;
• sending the respective identifier associated with a given code of the plurality of codes to the application;
• receiving a submitted code entered into the application from the client device;
• comparing the submitted code with the given code associated with the respective identifier;
• and
• authenticating the user in response to the submitted code matching the given code.

A method implemented by an application stored in memory and executable by a processor on a client device that provides multifactor authentication, comprising:

• submitting a request to a server to launch a new session for the application running on the client device;
• receiving a plurality of codes via a short messaging service (SMS) application associated with the client device;
• receiving an identifier that specifies one of the plurality of codes;
• rendering a request screen requesting a code associated with the identifier;
• receiving a submitted code from a user;
• and
• forwarding the submitted code to the server for authentication.