Patent Description:
The present disclosure generally pertains to systems and methods for managing leased appliances according to the independent claims.

It is common for expensive equipment such as refrigeration appliances to be leased by the end user. For example, restaurants, grocers, hotels, and the like often lease refrigeration appliances such as commercial refrigerators, freezers, and ice makers. Under the terms of an appliance leasing agreement, the lessee is responsible to make periodic lease payments to a lessor. Conventionally, if a lessee stops making required payments under an appliance leasing agreement, the lessor's remedy is to repossess the leased appliance.

<CIT> discloses a refrigerator renting management system which comprises a refrigerator control host, a remote server, a compressor and a control circuit arranged between the refrigerator control host and the compressor. The system is characterized in that the refrigerator control host is provided with a network communication module; the network communication module and the remote server are in communication connection; and the remote server provides instructions for the refrigerator control host through the network communication module to realize operation control of the compressor.

<CIT> discloses a leased refrigerator management system. The system comprises a refrigerator control host, a remote server, a compressor, and a control circuit arranged between the refrigerator control host and the compressor, and is characterized in that the refrigerator control host is provided with a network communication module; the network communication module realizes communication connection with the remote server; the remote server provides commands to the refrigerator control host through the network communication module, so as to realize operation control of the compressor.

<CIT> discloses a management system of a leased refrigerator, including a refrigerator main control system, a compressor, and a control circuit arranged between the refrigerator main control system and the compressor. The system is characterized in that the refrigerator main control system is provided with a mobile communication module. The mobile communication module and a remote server realize a communication connection; the operation control to the compressor is realized through the command signal that the mobile communication module receives from the remote server to the refrigerator main control system.

<CIT> discloses a management device for rental refrigerators, comprising a refrigerator control host, a compressor, and a control circuit arranged between the refrigerator control host and the compressor, characterized in that an auxiliary control circuit is arranged between the control circuit and the compressor. The auxiliary control circuit is provided with an auxiliary control host that sends a cut-off or close signal to the auxiliary control circuit, and the auxiliary control host is provided with a network communication module. The network communication module is connected to the remote server through the Internet, and the auxiliary control host receives the instruction signal of the remote server through the network communication module.

<CIT> discloses an ice-making machine and a method that controls the ability of an ice-making machine to make ice in response to the occurrence of lockout events, which may be due to part malfunction, power load maintenance, failure to make lease payments and other concerns. Upon the occurrence of a lockout event, a message is sent from a remote site and received by a receiver associated with the ice-making machine. The message includes a lockout command that is transferred to a controller of the ice-making machine. The controller then disables the ice-making machine from making ice.

<CIT> discloses a server held by a rental company, wherein a usage condition, such as a usage time and the number of uses, can be detected from the outside, and the usage condition of an electrical apparatus (a refrigerator or an air conditioner) lent to each customer is detected via a home server and a network. in compliance with the detected usage condition, an amount of the charge for the electrical apparatus is decided. Thus, the document discloses a means in which an amount of the charge can be lowered in comparison with a conventional fixed rate system. A further relevant prior art document is <CIT>.

In one aspect according to claim <NUM>, a refrigeration appliance for use under an appliance leasing agreement comprises an appliance controller configured for selectively controlling the refrigeration appliance in an operating mode in which the appliance controller operates the refrigeration appliance for performing an appliance function and a locked mode in which the appliance controller prevents the refrigeration appliance from being operated to perform the appliance function. Memory stores a local parameter defining a lockout time at which the refrigeration appliance will be locked out from performing the appliance function. The appliance controller is connected to the memory for reading the local parameter from the memory. The controller is configured to operate the refrigeration appliance in the operating mode until the lockout time and to switch the refrigeration appliance to the locked mode at the lockout time.

In another aspect according to claim <NUM>, a system for managing leased refrigeration appliances comprises an encrypted key generator. The encrypted key generator is configured to receive from a requester a key request containing an updated lockout time for a refrigeration appliance. The encrypted key generator is configured to generate an encrypted key in response to the key request and to provide the encrypted key to the requester. The encrypted key is configured to cause the refrigeration appliance to change a lockout time stored in memory to the updated lockout time when the encrypted key is entered into a user interface associated with the appliance.

In another aspect according to claim <NUM>, an asset management system for leased refrigeration appliances comprises a plurality of refrigeration appliances. An asset management server is remote from the plurality of refrigeration appliances. A client-server network connects the asset management server to the plurality of refrigeration appliances. The asset management server is configured to selectively send a command to any of the plurality of refrigeration appliances to set when the refrigeration appliance will be locked out from performing one or more of its appliance functions.

In another aspect not according to the present invention, a method of managing a leased appliance comprises setting a local parameter on the leased appliance to automatically cause the appliance to switch from an operating mode to a locked mode at a time associated with an initial payment made under an appliance leasing agreement. The local parameter is updated to a time associated with a second payment made under the appliance leasing agreement after the second payment is made.

In another aspect not according to the present invention, a method of managing a refrigeration appliance being leased comprises establishing a connection between the refrigeration appliance and the remote asset management server on a client-server network. The asset management server determines that a lease agreement governing the appliance has been broken. In response to said determining, a lock command is sent from the asset management server to the refrigeration appliance over the client-server network. The lock command is configured to cause a controller of the refrigeration appliance to switch from an operating mode to a locked mode.

Other aspects will be in part apparent and in part pointed out hereinafter.

The present inventors have recognized a need for a technical system that promotes better lease compliance, in order to mitigate against involuntary repossession of appliances. When the lease for a refrigeration appliance is broken by the lessee, currently, a lessor must undertake the substantial expense and hassle of repossessing the appliance. Meanwhile, the breaching lessee can continue its use of the appliance unabated. The inventors believe that lease compliance might be improved if the lessor was provided with the technical capability of reducing the functionality of the leased appliance upon violation of the lease without requiring the lessor to physically access or repossess the appliance. <FIG> shows an embodiment according to the present invention, which discloses a refrigeration appliance according to claim <NUM> and a system for managing leased refrigeration appliances according to claim <NUM>. <FIG> show embodiments being useful for understanding the invention, which are outside the subject-matter of the claims.

Referring to <FIG>, an exemplary system for managing leased appliances (e.g., an asset management system) is generally indicated at reference number <NUM>. The system broadly includes a plurality of leased refrigeration appliances (<NUM>) according to claim <NUM>, a remote asset management server <NUM>, a client-server network <NUM> connecting the refrigeration appliances to the asset management server, a remote encrypted key generator (<NUM>) being a component of a system according to claim <NUM> and one or more requester devices <NUM> configured to communicate with the encrypted key generator. As will be explained in further detail below, the system <NUM> broadly enables a lessor to use the asset management server <NUM> to cause the refrigeration appliances (<NUM>) according to claim <NUM> to lose functionality when a lease is violated. Furthermore, the illustrated appliances (<NUM>) according to claim <NUM> are equipped with local control systems that automatically limit use of an appliance when lease payments become delinquent. The asset management system <NUM> provides a mechanism for locally adjusting each appliance to reflect updated payments made under an appliance leasing agreement. In particular, a user can input an encrypted key provided by the encrypted key generator <NUM> to update the control system in accordance with payments made under the lease.

In the illustrated embodiment, each of the refrigeration appliances (<NUM>) according to claim <NUM> is depicted as being a commercial ice maker.

However, it will be understood that other types of refrigeration appliances, such as commercial refrigerators, commercial freezers, and residential refrigeration appliances can also be used in the system <NUM> without departing from the scope of the disclosure. In general, certain refrigeration appliances according to claim <NUM> in the scope of this disclosure will comprise a refrigeration system (e.g., a vapor-compression system, thermoelectric system, and/or other suitable refrigeration system) that is configured to cool a particular area associated with the appliance. In the case of the ice makers <NUM>, each refrigeration system (not shown) is configured to cool an ice formation device where water collects and is chilled to freeze into collectable ice. In the case of certain other types of refrigeration appliances, the refrigeration system will cool a defined storage area, such as the space inside a reach-in cabinet, display cabinet, drawer, walk-in compartment, etc. Refrigeration appliances according to claim <NUM> in the scope of this disclosure also include a control system having any of the features of control systems <NUM> of the ice makers <NUM>, discussed hereinafter. It is further contemplated that other types of appliances, such as cooking appliances, cleaning appliances (e.g., commercial sanitizing devices such as ozone sanitizers), medical appliances and water-using appliances, could be included in the asset management system without departing from the scope of the disclosure. In an example not being part of the invention, appliances in the scope of this disclosure will typically comprise an electronic local control system that includes one or more electronically controllable parts which carry out one or more appliance functions, one or more components that output a signal representing a real-time indication of how one or more aspects of the appliance is operating or performing, and a local controller for operating the controllable parts and/or receiving operating data from the signal outputting components of the appliance. Furthermore, appliances in the scope of this disclosure will typically comprise a network interface or port (e.g., a cellular data antenna or Wi-Fi antenna) that enables the appliances to connect to the asset management system network and communicate with the remote asset management system server.

The illustrated control system <NUM> includes an appliance controller <NUM> configured for controlling the appliance (<NUM>) according to claim <NUM>. In general, the appliance controller <NUM> comprises a processor for controlling the appliance. The processor may be, for example, a commercially available microprocessor, an application-specific integrated circuit (ASIC) or a combination of ASICs, which are designed to achieve one or more specific functions, or enable one or more specific devices or applications. Accordingly, the appliance controller <NUM> may include any type of processor typically used in electronically controlled appliances.

The illustrated appliance controller <NUM> is configured to selectively control the refrigeration appliance <NUM> in (i) an operating mode in which the appliance controller operates the refrigeration appliance for performing an appliance function and (ii) a locked mode in which the appliance controller prevents the refrigeration appliance from being operated to perform the appliance function. In the illustrated example of the ice makers <NUM>, in the operating mode, the appliance controller is configured to operate the appliance to freeze water into ice and collect the ice. For instance, in the case of the batch-type ice maker described in <CIT>, the appliance controller <NUM> operates a refrigeration system to cool a freeze plate and warm the freeze plate in a series of alternating freeze cycles and harvest cycles and concurrently operates a water system to distribute liquid water along the freeze plate during the freeze cycles so that the water freezes into ice that can be released from the freeze plate during each following harvest cycle. By contrast, in a locked mode the appliance controller <NUM> prevents the refrigeration system from cooling the freeze plate to a freezing temperature, prevents the refrigeration system from warming the freeze plate to a sufficient temperature to harvest the ice, and/or prevents the water system from distributing water onto the freeze plate for making ice.

It is contemplated that refrigeration appliances in the scope of this disclosure can conduct operating and locked modes in other ways, depending on the type of refrigeration appliance in question and the preferred locked mode characteristics of the appliance. In the case of a nugget-type ice maker, the appliance controller operates, in the operating mode, a refrigeration system, water system, and auger in coordination to produce nugget ice when called upon; whereas in the locked mode, the appliance controller prevents any one or more of the refrigeration system, the water system, and the auger from operating so that no ice is made. In the case of a refrigerated storage appliance, such as a reach-in cooler, display cooler, walk-in cooler, refrigerated drawer(s), etc., in certain embodiments, the appliance controller operates the refrigeration system to cool the associated space in the operating mode; whereas in the locked mode, the appliance controller prevent s the refrigeration system from operating altogether or to its full capacity. In other embodiments, the appliance controller operates an automated door or drawer lock of a refrigerated appliance differently in the operating mode and the locked mode. For instance, in the operating mode the appliance controller maintains the automated door lock in an unlocked configuration so that a user can access the refrigerated interior of the appliance. By contrast, in the locked mode, the appliance controller maintains the automated door lock in a locked configuration so that access to the refrigerated interior is restricted.

Referring to the refrigeration appliance <NUM> depicted in <FIG>, the illustrated control system <NUM> further comprises a memory <NUM> (e.g., tangible machine-readable memory) which stores a local parameter <NUM> that defines a lock at time at which the appliance will be automatically locked out from performing one or more of its refrigeration functions as described above. In the illustrated embodiment, the local parameter <NUM> defines a predefined month, predefined day, and predefined year at which the appliance <NUM> will be automatically locked out from performing one or more of its refrigeration functions. The appliance controller <NUM> is connected to the memory <NUM> for reading the local parameter <NUM> from the memory. In an exemplary embodiment, the predefined month, predefined day, and predefined year are accessed from the discrete registers of the appliance controller. The appliance controller <NUM> is configured to operate the refrigeration appliance in the operating mode until the lockout time defined in the local parameter <NUM> and automatically switch the appliance to the locked mode at the lockout time. It will be appreciated that other ways of storing and accessing a predefined time at which the appliance will automatically become locked out can also be used without departing from the scope of the disclosure.

The illustrated control system <NUM> further comprises a lockout time change module <NUM>, which generally comprises a circuit for, or processor executing stored instructions for, adjusting the local parameter <NUM> stored in the memory <NUM> in response to a time change input. In one embodiment, the appliance controller <NUM> executes the lockout time change module <NUM>. In another embodiment, the lockout time change module <NUM> is executed by a separate processor or circuit that is in communication with the appliance controller <NUM>. Regardless, the time change module <NUM> is configured to receive a lockout time change input, and in response to receiving the lockout time change input, change the lockout time stored in the memory <NUM>. In the illustrated embodiment, the lockout time change module <NUM> is in communication with a user interface <NUM> (e.g., touchscreen interface or push-button interface) of the refrigeration appliance <NUM> to receive a lockout time change input from the user interface. In other words, the illustrated refrigeration appliance <NUM> is configured to allow a local user to enter a local input to the user interface <NUM>, and based on the local input, the time change module <NUM> can change the locally stored parameter <NUM> defining the time at which the appliance will be automatically locked.

The time change module <NUM> is configured to require an encrypted key to make a change to the lockout time parameter <NUM> based on an input to the user interface <NUM>. Accordingly, the time change input provided to the user interface <NUM> comprises an encrypted key, and the lockout time change module <NUM> is configured to execute a decryption algorithm to decrypt the encrypted key and determine an updated lockout time for changing the parameter <NUM> stored in the memory <NUM>. As will be explained in further detail below, the requirement for an encrypted key to make a local change to the lockout time parameter <NUM> can provide a lessor with substantial control over when the refrigeration appliance <NUM> switches from the operating mode to the locked mode, even when the lessor does not have direct physical access to the appliance or network access to the device as described below. It can be seen that, each of a plurality of refrigeration appliances <NUM> in the asset management system <NUM> is configured to decrypt an encrypted key and set the local parameter <NUM> defining the time at which the refrigeration appliance will be locked out based on the encrypted key.

Referring to <FIG>, in an exemplary embodiment, the appliance controller <NUM> is configured to generate one or more displays <NUM>, <NUM>, <NUM> on the user interface <NUM> that facilitate entry of the encrypted key and provide information about the operating status of the appliance <NUM>. <FIG> provides an example of a user interface display <NUM> that that includes a lockout date display field <NUM> at which the user interface provides an indication of the time (e.g., date) when the appliance will automatically switch from the operating mode to the locked mode. The display further comprises a key entry selection item <NUM> that can be selected by a touchscreen input to call up a key entry display <NUM>, shown in <FIG>. A user can make touchscreen inputs to the user interface <NUM> on the display <NUM> to enter an encrypted key for locally changing the lockout time parameter <NUM> stored in the memory <NUM> of the appliance <NUM>. As shown in <FIG>, if the appliance <NUM> switches to the locked mode, in response to any activation of the user interface <NUM>, the controller <NUM> will cause a lock screen display <NUM> to be displayed on the user interface, which provides an indication to the user that the appliance has been locked.

Referring again to <FIG>, in the illustrated embodiment, the encrypted key for changing the lockout time parameter <NUM> is obtained from the remote encrypted key generator (<NUM>) being a component of the system according to claim <NUM>. The encrypted key generator generally comprises a processor configured to execute an encryption algorithm to generate the encryption key (e.g., based on instructions stored in memory accessible to the processor). In an exemplary embodiment, the encrypted key generator is connected to the internet so that one or more requester devices <NUM> (e.g., internet-connected personal computers or mobile devices) can request the encrypted key remotely using a web application. The encrypted key generator <NUM> is configured to receive from a requester device <NUM> a key request containing an updated lockout date for a particular refrigeration appliance <NUM>. And in response, the encrypted key generator <NUM> is configured to generate an encrypted key that can be input to the user interface <NUM> to change the lockout time parameter <NUM> as described above. In an exemplary embodiment, the encrypted key generator <NUM> is configured to generate an encrypted key based on an algorithm that is a function of (i) an identifier of the particular refrigeration appliance <NUM> in question (e.g., a serial number), (ii) the updated lockout time, and (iii) the date on which the encrypted key will be entered into the user interface <NUM> of the appliance (typically, the current date). It will be understood that any suitable encryption algorithm that can generate an encrypted key based on any set or subset of the parameters (i)-(iii), alone or in combination with other input parameters, can be used without departing from the scope of the disclosure. The time change module <NUM> of the appliance <NUM> is pre-programed to decrypt the encrypted key generated by the encryption algorithm used by the encrypted key generator <NUM>. Thus, in an exemplary embodiment, the local time change module <NUM> executes a decryption algorithm that is a function of the parameters (i)-(iii) to determine the updated lockout time and make the corresponding change to the lockout time parameter <NUM> stored in the appliance memory <NUM>.

The illustrated refrigeration appliance <NUM> further comprises a network interface <NUM> configured to connect the refrigeration appliance to the client-server network <NUM> for communication with the remote asset management server <NUM>. In the illustrated embodiment, the network interface <NUM> comprises a wireless transceiver such as a cellular data transceiver or a WiFi transceiver. Other types of network interfaces (e.g., hardwired internet ports, etc.) can also be used without departing from the scope of the disclosure.

In an exemplary embodiment, a lessor ensures that each of its leased refrigeration appliances <NUM> is registered with an asset management application that runs on the asset management server <NUM>. It will be understood that the "asset management server" could be a dedicated server system at a single location or distributed computing resources (e.g., a cloud-based system) capable of running the asset management application and communicating with the refrigeration appliances <NUM> over the client-server network <NUM>. In certain embodiments, the lessor has an authenticated user or administrator account with the asset management application. In certain embodiments, registering the refrigeration appliance <NUM> with the asset management application comprises registering the appliance to the account of the lessor so that the lessor can enact administrator control over the control system <NUM> of each refrigeration appliance by issuing commands from the asset management server <NUM> to the refrigeration appliances <NUM> over the network <NUM>.

Thus, the refrigeration appliance <NUM> is configured so that one or more authenticated users of the remote asset management server <NUM> can remotely control certain aspects of the appliance. In an exemplary embodiment, the asset management server can issue a command to the refrigeration appliance <NUM> via the network <NUM> to the network interface <NUM> that overwrites the lockout time parameter <NUM> stored in the memory <NUM>. Suitably, the network interface passes the command to the appliance controller <NUM>, which in turn changes the lockout time parameter <NUM> stored in the memory <NUM> to an updated lockout time based on the command from the asset management server <NUM>. In an example not being part of the present invention, when the appliance <NUM> is pre-registered to the asset management server <NUM> as explained above, the refrigeration appliance <NUM> does not require an encrypted key from the asset management server <NUM> in order to overwrite the lockout time parameter <NUM> stored in the memory <NUM>. It will be understood, however, that refrigeration appliances could require a command from a remote server to include an encrypted key before changing the lockout time parameter stored in the memory <NUM>.

Exemplary methods of using the system <NUM> will now be described, which are useful for understanding the invention, but they are outside the subject-matter of the claims. Typically, the system <NUM> will be administered by a lessor of appliances in cooperation with the appliance lessees. When an appliance <NUM> is initially leased, the lessor will register the appliance to the asset management server <NUM> and deploy the appliance with a lockout time parameter <NUM> stored in the memory <NUM> that corresponds with the initial term for which the lessee has made payments under the appliance leasing agreement. Thus, at the time of initial deployment, the appliance <NUM> is configured to automatically switch from the operating mode to the locked mode when the initial payments on the lease expire. As explained more fully below, payment to extend the lease can be required to prevent the appliance from switching to the locked mode at the initial lockout time stored in the memory <NUM>.

In the typical scenario, the appliance <NUM> will be deployed at a location where it can connect to the network <NUM>. In these cases, the lessor requests payment from the lessee before the expiration of the initial paid term of the lease. Upon receiving payment to extend the paid term of the lease, the lessor sends a command from the asset management server <NUM> to the appliance <NUM> to adjust the lockout time parameter <NUM> stored in the memory <NUM>. The controller <NUM> then updates the parameter <NUM>, thereby adjusting the time at which the appliance <NUM> will automatically switch from the operating mode to the locked mode. If payment is not received by the time set by the parameter <NUM>, the controller <NUM> automatically switches to the locked mode at the designated time. As explained above, use of the appliance is then restricted until the lessee makes payment on the lease. When further payment is received, the lessor can send a command from the asset management server <NUM> to the appliance <NUM> to update the lockout time parameter <NUM>. This causes the controller <NUM> to switch from the locked mode to the operating mode, thereby unlocking the appliance for full-featured use. As can be seen, the illustrated asset management system <NUM> provides an automated mechanism for motivating a lessee to make lease payments without requiring the lessor to have physical access to the leased appliance.

Furthermore, the illustrated asset management system <NUM> can provide the same general mechanism for motivating lease payments, even in the event that network connection is unavailable or lost. In instances in which the lessor is not able to send direct commands to the leased appliance <NUM> over the network <NUM>, the lessor can instead use the remote encrypted key generator <NUM> to allow the lessee to periodically extend the operating mode of the appliance after making payment. Again, the lessor can request payment from the lessee before the expiration of the initial paid term of the lease. Upon receiving payment to extend the paid term of the lease, instead of sending a command over the network <NUM>, the lessor uses a requester device <NUM> to request an encrypted key from the encrypted key generator <NUM>. For instance, the lessor provides the encrypted key generator with the serial number for the appliance <NUM> in question, along with the updated lockout date and the current date, and in response, the encrypted key generator <NUM> returns an encrypted key. The lessor then provides the encrypted key to the lessee, and the lessee inputs the encrypted key locally using the user interface <NUM>. In response to receiving the encrypted key from the user interface <NUM>, the lock control module <NUM> updates the lockout time parameter <NUM> stored in the memory to extend to the time at which the appliance will automatically switch to the locked mode.

It can be seen that the illustrated asset management system <NUM> provides a way for a lessor to restrict use of leased appliances when the lessees become delinquent on payment, even when direct physical access to the appliance is not possible. The inventors believe that this system <NUM> can substantially improve lease compliance and reduce the traditional burden imposed on lessors for ensuring compliance.

In one or more embodiments, the lessor can deploy the appliances in an operating mode of indefinite duration and switch the appliance to the locked mode only when there is a breach of the lease. Using the illustrated asset management system <NUM>, this methodology is possible by deploying the appliance <NUM> with lockout time parameter set to a null value which causes the controller <NUM> to run the appliance in the operating mode indefinitely. When a breach of the lease occurs, the lessor can send a command (broadly, a lock command) from the asset management server <NUM> over the network <NUM> to the appliance that adjusts the parameter <NUM> from the null value to a time value that corresponds to a current or past time. In response, the controller <NUM> will immediately switch the ice maker to the locked mode. Again, when compliance with the lease is restored (e.g., payment is made) the lessor can send an unlock command from the asset management server <NUM> over the network <NUM> to the appliance <NUM>. The unlock command adjusts the parameter <NUM> back to the null value or to a future time value corresponding with the payments that have been made on the lease.

In an example not according to the present invention, instead of having a lockout time parameter <NUM>, a controller could access one or more registers which define a toggle between at least an operating mode and a locked mode. In this scenario, the asset management server would be configured to send lock and unlock commands over the client server network that switch the toggle parameter(s) and thereby change the appliance between the locked mode and operating mode as directed.

When introducing elements of the present invention or the preferred embodiment(s) thereof, the articles "a", "an", "the" and "said" are intended to mean that there are one or more of the elements.

Claim 1:
A refrigeration appliance (<NUM>) for use under an appliance leasing agreement, the refrigeration appliance comprising:
an appliance controller (<NUM>) configured for selectively controlling the refrigeration appliance in an operating mode in which the appliance controller operates the refrigeration appliance for performing an appliance function and a locked mode in which the appliance controller prevents the refrigeration appliance from being operated to perform the appliance function; and
memory (<NUM>) storing a local parameter (<NUM>) defining a lockout time at which the refrigeration appliance will be locked out from performing the appliance function;
wherein the appliance controller is connected to the memory for reading the local parameter from the memory, the controller being configured to operate the refrigeration appliance in the operating mode until the lockout time and to switch the refrigeration appliance to the locked mode at the lockout time;
the refrigeration appliance further comprising a lockout time change module (<NUM>), the lockout time change module being configured to receive a lockout time change input, and in response to receiving the lockout time change input, change the lockout time in the memory;
wherein the lockout time change input comprises an encrypted key, the lockout time change module being configured to execute a decryption algorithm to decrypt the encrypted key and determine an updated lockout time for changing the lockout time stored in the memory.