Patent ID: 8254530

Claim:
A method of authorizing users in a system capable of receiving spoken input from users, the method comprising: retrieving a user record from a set of user records, each user record containing at least a stored multi-digit number and a stored expression of the stored multi-digit number, wherein the stored expression is based upon a particular utterance of the stored multi-digit number, where the particular utterance comprises a select one of many ways to utter the stored multi-digit number; prompting a user to input a Personal Identification Number (PIN); recording the user's input in response to the prompt; processing the user's input to derive an extracted multi-digit number; processing the user's input to derive an extracted expression, wherein the extracted expression corresponds to the user's format in expressing the extracted multi-digit number; and authorizing the user if the extracted multi-digit number matches the stored multi-digit number in the retrieved user record and the extracted expression matches the stored expression in the retrieved user record.