Patent Document ID: 9860239
Application ID: 15056768
Patent Flag: 1

Claim One:
1. A method of verifying that a user is authorized to access a computer-accessible resource, the method comprising: maintaining, for a plurality of authenticated users, data reflecting historical voice call characteristics indicative of each of the authenticated users; maintaining a communication number of a verification device associated with a user; receiving a request by the user to access a computer-accessible resource; utilizing the communication number to establish a voice call session with the user's verification device in order to send a request that the user perform a verification action; monitoring one or more voice call characteristics during the voice call session, the monitored one or more voice call characteristics including timing data related to the voice call session; determining whether the user successfully performed the requested verification action; determining whether an authentication rule has been satisfied by: identifying the authenticated user that the user purports to be, comparing the monitored one or more voice call characteristics of the user to the maintained voice call characteristics of the authenticated user, and evaluating whether the monitored one or more voice call characteristics fall within ranges of the authenticated user's voice call characteristics; and if the verification action has been successfully completed by the user and if the authentication rule has been satisfied by the monitored voice call characteristics, generating an authentication response that indicates that the user has been authenticated for access to the computer-accessible resource.