Patent ID: 11895113
Assignee: VISA INTERNATIONAL SERVICE ASSOCIATION
Field: Digital communication (Electrical engineering)
Classification: CPC G  H | IPC H

Claim 13:
14. A method comprising:
receiving, by an authentication device from an initiator device, a witness request;
determining, by the authentication device, a first assurance level with respect to the initiator device based on a trust score, the first assurance level determined from a range of assurance levels;
obtaining, by the authentication device, a token share corresponding to the first assurance level, wherein the token share is one of a plurality of token shares associated with a plurality of authentication devices, respectively, wherein each of the plurality of token shares is a portion of an authentication token or determined using a key share that is a fraction of a cryptographic key, and wherein the plurality of token shares results are used in generation of the authentication token; and
transmitting, by the authentication device to the initiator device, the token share for the first assurance level.