Granted Patent B2

US 7,942,315 · App. 11/899,381 · Granted May 17, 2011

Abstract

Claims (25)

1. A method of detecting attempted fraud at a self-service terminal, the method comprising:

providing a classifier having a plurality of input zones, each input zone being adapted to receive data of a different modality;

mapping inputs from a plurality of sensors in the self-service terminal to respective input zones of the classifier;

for each input zone, independently operating on inputs within that zone to create a weighted set;

combining the weighted sets using a dedicated weighting function for each weighted set to produce a composite set; and

deriving a plurality of class values from the composite set to create a classification result.

2. A method according to claim 1 , wherein operating on inputs within a zone to create a weighted set comprises using base kernels to create a weighted set.

3. A method according to claim 1 , wherein deriving a plurality of class values from the composite set to create a classification result includes using regression techniques to derive the plurality of class values.

4. A method according to claim 1 , wherein providing a classifier having a plurality of input zones includes providing a Bayesian model as the classifier.

5. A method according to claim 1 , wherein the classifier uses different parameters for different operating modes of the self-service terminal.

6. A computerized method of detecting attempted fraud at a self-service terminal, the method comprising:

providing a statistical model comprising a statistical classifier, the statistical classifier including a hierarchy of kernels;

mapping inputs from sensors in the self-service terminal into the statistical classifier including mapping the inputs into the hierarchy of kernels; and

operating on the inputs using the hierarchy of kernels of the statistical classifier to classify the inputs and to predict a probability of fraud from classified inputs by a processor of the self-service terminal.

7. A method according to claim 6 , further comprising

communicating an alarm signal to a remote management system in the event that the probability of fraud exceeds a predetermined level.

8. A self-service terminal comprising:

a plurality of customer interaction devices; and

a controller coupled to the customer interaction devices for controlling their operation, the controller including a statistical model including a statistical classifier, the statistical classifier including a hierarchy of kernels to classify inputs received from the customer interaction devices and to predict a probability of fraud based on classified inputs.

9. A self-service terminal according to claim 8 , wherein the terminal is an automated teller machine ((Original) ATM).

10. A method of operating a network of self-service terminals coupled to a management system, where each terminal includes a statistical classifier including a hierarchy of kernels for classifying inputs received from customer interaction devices of the self-service terminals and for predicting fraud based on classified inputs during customer operation of that terminal, the method comprising:

receiving a communication from a self-service terminal indicating that the classifier in that terminal has predicted a probability of fraud based on the classified inputs from the hierarchy of kernels during the customer operation; and

triggering a dispatch signal to dispatch a customer engineer to the self-service terminal to ascertain if fraud is being perpetrated.

11. A method according to claim 10 , wherein the management system is operable to transmit an updated statistical model for a classifier in the event that a new statistical model becomes available.

12. A method according to claim 10 , wherein the management system is operable to transmit a risk parameter that indicates a probability of fraud value that must be met for the terminal to indicate fraud.

Assignments (10)