System and method for detecting unauthorized access using a voice signature

1. A method for detecting unauthorized access, comprising:

receiving a voice input associated with a request to access an account;

generating a request voice signature corresponding to the voice input associated with the request;

retrieving an authorized voice signature corresponding to the account;

comparing the request voice signature corresponding to the voice input with the authorized voice signature corresponding to the account;

determining if the fraudulent voice signature file comprises the request voice signature;

adding the request voice signature to the fraudulent voice signature file if the fraudulent voice signature file does not comprise the request voice signature;

detecting unauthorized access in response to the comparison;

accessing a fraudulent voice signature file; and

identifying a user associated with the request voice signature in accordance with the fraudulent voice signature file.

2. The method of claim 1 , further comprising:

authorizing a user for the account; and

generating the authorized voice signature corresponding to the authorized user.

3. The method of claim 1 , further comprising:

authorizing a user for the account;

receiving an authorized voice input corresponding to the authorized user; and

generating the authorized voice signature according to the authorized voice input.

4. The method of claim 1 , wherein generating the request voice signature corresponding to the voice input associated with the request comprises:

determining a request feature vector corresponding to the voice input; and

generating the request voice signature according to the request feature vector.

5. The method of claim 1 , wherein comparing the request voice signature corresponding to the voice input with the authorized voice signature corresponding to the account comprises:

establishing a request feature vector corresponding to the request voice signature, the request feature vector comprising a plurality of first values, each first value corresponding to a variable of a plurality of variables;

establishing an authorized feature vector corresponding to the authorized voice signature, the authorized feature vector comprising a plurality of second values, each second value corresponding to a variable of the plurality of variables, each second value corresponding to a first value; and

comparing each first value with the corresponding second value to compare the request voice signature with the authorized voice signature.

6. The method of claim 1 , further comprising denying access to the account in response to detecting the unauthorized access.

7. A system for detecting unauthorized access, comprising:

a database operable to store an authorized voice signature corresponding to an account; and

a processor coupled to the database and operable to:

receive a voice input associated with a request to access the account;

generate a request voice signature corresponding to the voice input associated with the request;

retrieve the authorized voice signature corresponding to the account;

compare the request voice signature corresponding to the voice input with the authorized voice signature corresponding to the account;

detect unauthorized access in response to the comparison;

access a fraudulent voice signature file;

identify a user associated with the request voice signature in accordance with the fraudulent voice signature file;

determine if the fraudulent voice signature file comprises the request voice signature; and

add the request voice signature to the fraudulent voice signature file if the fraudulent voice signature file does not comprise the request voice signature.

8. The system of claim 7 , the processor further operable to:

authorize a user for the account; and

generate the authorized voice signature corresponding to the authorized user.

9. The system of claim 7 , the processor further operable to:

authorize a user for the account;

receive an authorized voice input corresponding to the authorized user; and

generate the authorized voice signature according to the authorized voice input.

10. The system of claim 7 , the processor further operable to generate the request voice signature corresponding to the voice input associated with the request by:

determining a request feature vector corresponding to the voice input; and

generating the request voice signature according to the request feature vector.

11. The system of claim 7 , the processor further operable to compare the request voice signature corresponding to the voice input with the authorized voice signature corresponding to the account by:

establishing a request feature vector corresponding to the request voice signature, the request feature vector comprising a plurality of first values, each first value corresponding to a variable of a plurality of variables;

establishing an authorized feature vector corresponding to the authorized voice signature, the authorized feature vector comprising a plurality of second values, each second value corresponding to a variable of the plurality of variables, each second value corresponding to a first value; and

comparing each first value with the corresponding second value to compare the request voice signature with the authorized voice signature.

12. The system of claim 7 , the processor further operable to deny access to the account in response to detecting the unauthorized access.

13. A method for detecting unauthorized access, comprising:

authorizing a user for an account;

receiving an authorized voice input corresponding to the authorized user;

generating an authorized voice signature corresponding to the account according to the authorized voice input;

receiving a voice input associated with a request to access the account;

generating a request voice signature corresponding to the voice input associated with the request by:

determining a request feature vector corresponding to the voice input; and

generating the request voice signature according to the request feature vector;

retrieving the authorized voice signature corresponding to the account;

comparing the request voice signature corresponding to the voice input with the authorized voice signature corresponding to the account by:

establishing a request feature vector corresponding to the request voice signature, the request feature vector comprising a plurality of first values, each first value corresponding to a variable of a plurality of variables;

establishing an authorized feature vector corresponding to the authorized voice signature, the authorized feature vector comprising a plurality of second values, each second value corresponding to a variable of the plurality of variables, each second value corresponding to a first value; and

comparing each first value with the corresponding second value to compare the request voice signature with the authorized voice signature;

detecting unauthorized access in response to the comparison;

denying access to the account in response to detecting the unauthorized access;

accessing a fraudulent voice signature file comprising a plurality of fraudulent voice signatures;

determining if the fraudulent voice signature file comprises the request voice signature;

adding the request voice signature to the fraudulent voice signature file if the fraudulent voice signature file does not comprise the request voice signature;

identifying a user associated with the request voice signature in accordance with the fraudulent voice signature file;

receiving a user voice signature;

comparing the user voice signature to at least a portion of the plurality of fraudulent voice signatures;

determining whether the user voice signature matches a fraudulent voice signature; and

identifying the user voice signature as fraudulent if the user voice signature matches a fraudulent voice signature.