Composite biometric authentication

A system for authorizing a request using biometric inputs, the system comprising a processor coupled to a memory that stores instructions that when executed cause the processor to:

• receive the request associated with a first user;
• and in response to the request, initiate a composite biometric authentication process comprising:
• requesting and receiving a first biometric input from the first user and a second biometric input from a second user;
• generating a first input composite biometric key based on the first biometric input and the second biometric input;
• determining whether the first input composite biometric key satisfies criteria of a first user-specific reference composite biometric key uniquely identifying the first user;
• requesting and receiving a third biometric input from the first user and a fourth biometric input from a second user;
• generating a second input composite biometric key based on the third biometric input and the fourth biometric input;
• determining whether the second input composite biometric key satisfies criteria of a second user-specific reference composite biometric key uniquely identifying the second user;
• and authorizing an operation associated with the request based at least on the criteria of the first user-specific reference composite biometric key and the criteria of the second user-specific reference composite biometric key being satisfied.

A computer-readable medium for authorizing a request using biometric inputs, the computer-readable medium having instructions to control one or more processors configured to:

• receive the request associated with a first user;
• and in response to the request, initiate a composite biometric authentication process comprising:
• requesting and receiving a first biometric input from the first user and a second biometric input from a second user;
• generating a first input composite biometric key based on the first biometric input and the second biometric input;
• determining whether the first input composite biometric key satisfies criteria of a first user-specific reference composite biometric key uniquely identifying the first user;
• requesting and receiving a third biometric input from the first user and a fourth biometric input from a second user;
• generating a second input composite biometric key based on the third biometric input and the fourth biometric input;
• determining whether the second input composite biometric key satisfies criteria of a second user-specific reference composite biometric key uniquely identifying the second user;
• and authorizing an operation associated with the request based at least on the criteria of the first user-specific reference composite biometric key and the criteria of the second user-specific reference composite biometric key being satisfied.