Various systems and methods for authenticating a user are described herein. A system comprises a processor subsystem; and a memory including instructions, which when executed by the processor subsystem, cause the processor subsystem to: receive at a server from a first user device, a first authentication token; receive at the server from a second user device, a second authentication token; authenticate the user based on the first and second authentication tokens; and establish a communication session from the server to the first user device when the user is authenticated.