ATM security system

A security system useful for monitoring an automated teller machine (ATM) includes a camera that provides images of at least selected portions of the ATM. A controller automatically determines whether a difference between a reference image of the ATM and a subsequently acquired image from the camera indicates an alteration to the ATM. One example provides the ability to detect whether a skimming reader has been placed adjacent a card receiving slot. A disclosed example includes acquiring a plurality of reference images corresponding to different lighting conditions and using an appropriate one of the reference images based upon a lighting condition or time of day associated with a subsequently acquired image.

BACKGROUND OF THE INVENTION

This invention generally relates to security systems. More particularly, this invention relates to security systems useful for monitoring potential alterations of automated teller machines.

Automated teller machines (ATMs) have become well known and widely used. ATMs allow individuals twenty-four hour access to their bank accounts to conduct a number of transactions. One advantage to ATMs is their convenience to bank customers. Another advantage is the ability for banks to have transactions automated, which presents a cost savings to the bank.

One feature of known ATMs is that they require a sufficient amount of information regarding a bank customer before allowing a transaction to be completed. The conventional way of providing such information to the ATM is by inserting a card that includes a magnetic strip containing customer information. Maintaining such information confidential and secure has recently become problematic.

Skimming readers have been developed that are placed over a card reader slot on an ATM. These skimming readers read the magnetic strip on the card as a bank customer inserts their card for purposes of conducting a transaction with the bank. The skimming reader scans the magnetic strips of cards inserted into the card reader slot and gathers the information regarding each individual and their account.

By using a hidden camera or a secretly located individual, the customer's access code (i.e., a manually entered PIN) can be gathered. That information combined with the information gathered by the skimming reader allows an unauthorized individual to gain unauthorized access to the individual's bank account or accounts and make illegal fund withdrawals.

There is a need for a system that protects against such skimming. This invention addresses that need.

SUMMARY OF THE INVENTION

An exemplary disclosed security system for monitoring an ATM includes a camera that provides at least one reference image of at least a portion of the ATM. The camera also provides at least one subsequently acquired image of the same portion of the ATM. A controller automatically determines whether a difference between the reference image and the subsequently acquired image indicates an alteration to the ATM.

In one example, the controller provides an indication of an alert condition when a difference between the reference image and the subsequently acquired image indicates an alteration to the ATM.

One example includes making sure that there is no motion in the vicinity of the ATM that would result in a difference between the reference image and the subsequently acquired image to avoid a false positive detection of a potential alteration of the ATM. One example includes a motion detector for providing an indication of such motion.

One example includes acquiring a plurality of reference images, each corresponding to a different condition that may affect the appearance of the ATM in an image of the ATM. One example includes acquiring different reference images for different times of day. Another example includes acquiring different reference images corresponding to different lighting conditions that may affect shadowing, for example. The controller in one example determines which reference image corresponds to a condition associated with the subsequently acquired image and uses the appropriate reference image for determining whether there may have been an alteration to the ATM. In another example, the controller uses the different reference images to rule out any problem areas from the field of vision of the camera or the subject ATM.

The various features and advantages of this invention will become apparent to those skilled in the art from the following detailed description of a currently preferred embodiment. The drawing that accompanies the detailed description can be briefly described as follows.

DETAILED DESCRIPTION

FIG. 1schematically shows one example system20for providing security at an automated teller machine (ATM). An ATM interface22is schematically shown including a card reader portion24for receiving a card that includes a readable strip of information. In one example, a card having a magnetic strip encoded with appropriate information allows an individual to gain access to a bank account after inserting the card into the card reader portion and then entering a personal identification number (PIN).

A camera26has a field of vision arranged to view the ATM interface22, or at least portions of it, including the card reader portion24. In one example, the camera26is a CCTV camera that operates in a known manner to provide digital images of the ATM interface22.

A controller30includes an image processing module for gathering information regarding the ATM interface22and processes that information in a manner that allows for detecting whether a skimming reader may have been appended to the ATM interface or some other alteration has been made. In one example, the image processing module uses known digital video processing and analysis techniques for automatically making such a determination.

In the illustrated example, a database32of reference images acquired by the camera26can be utilized by the controller30. Each reference image shows the ATM interface22when it is in a known condition. In one example, the database32includes reference images of the ATM interface22under various lighting conditions so that a full appreciation of the various shadowing and other lighting effects that may change during the course of a day, for example, are maintained and available for the controller30. In one example, the reference image information is stored in connection with an associated time of day or range of times during which that particular image is an acceptable reference for the expected look of the ATM interface.

In one example, the controller30goes through a learning phase to determine whether any portions of reference images are prone to changes or unclarities that would be problematic when later using the reference images. For example, one side of an ATM may always appear dark because of shadowing. The controller30in one example learns where such areas within an image occur and rules out a corresponding portion of images processed to determine a condition of the ATM.

The camera26remains focused on the appropriate portions of the ATM interface22and periodically acquires an image34of the ATM interface22. The image processing module automatically compares a most recent subsequently acquired image with an appropriate reference image from the database32. Whenever there is a discrepancy or difference between a subsequently acquired image and an appropriate reference image, the alert is provided to an alert module36. In one example, the alert module36provides an indication to an individual that there is a suspicious condition of a particular ATM.

In one example, the reference image and the most recent subsequently acquired image that instigated the alert are presented on a display38associated with the alert module36so that an individual can manually, visually analyze and compare the images. The individual is then able to decide whether the difference indicates that some alteration to the ATM may have been made, such as placing a skimming reader over the card reader portion24.

In one example, the subsequently acquired images34used for determining a current condition of the ATM are only collected under static conditions to avoid having the presence of an individual in front of the ATM interface22being interpreted as a change to the interface that would otherwise generate a potential alert. The illustrated example includes a motion detector40for providing an indication of motion in the vicinity of the ATM interface22. Any known motion detector such as a pyroelectric sensor could be used. In one example, the motion detector40is an integrated part of the camera26. In another example, a separate motion detector40is used.

The controller30uses information from the motion detector40to determine whether there is motion in the vicinity of the ATM interface22at a time associated with a subsequently acquired image. In one example, the controller30only uses subsequently acquired images that occur under static conditions when there is no motion as indicated by a motion detector, for example.

The example system20allows for recognizing when any unauthorized change has been made to an ATM interface. One advantage of such an arrangement is that there is an ability to detect when a skimming reader has been placed over a card slot24, which would otherwise be unrecognized by the average bank customer. One particular advantage to the disclosed example is that it has the ability to collect a variety of reference image data to address various lighting conditions and the different shadowing that may occur on an ATM interface at different times of day, for example. Having a more accurate, more complete database of reference images allows for more accurate detection of potential alert situations.