Secure cross-device authentication system

A first user device, comprising:

• a memory;
• and
• a processor communicatively coupled to the memory, the memory and the processor being configured to:
• determine unavailability of a first biometric unit associated with the first user device for verification of first biometric information;
• select, based at least in part on determining unavailability of the first biometric unit, a second biometric unit associated with a second user device for verification of second biometric information;
• receive, from the second user device based at least in part on a first verification of the second biometric information, a first factor associated with authentication of the first user device by a service provider;
• receive, from the second user device based at least in part on successful authentication of the first factor and on a second verification of the second biometric information, a second factor associated with authentication of the first user device by the service provider;
• and
• receive, from the service provider, a service based at least in part on successful authentication of the second factor.

A non-transitory computer-readable medium configured to store instructions, which when executed by a processor associated with a first user device, cause the processor to:

• determine unavailability of a first biometric unit associated with the first user device for verification of first biometric information;
• select, based at least in part on determining unavailability of the first biometric unit, a second biometric unit associated with a second user device for verification of second biometric information;
• receive, from the second user device based at least in part on a first verification of the second biometric information, a first factor associated with authentication of the first user device by a service provider;
• receive, from the second user device based at least in part on successful authentication of the first factor and on a second verification of the second biometric information, a second factor associated with authentication of the first user device by the service provider;
• and
• receive, from the service provider, a service based at least in part on successful authentication of the second factor.