KR20180120405A - Anonymous payment method to provide location privacy for wireless charging of electrical vehicles and system therefor - Google Patents

Abstract

An anonymous payment method for providing location privacy for the wireless charging of electrical vehicles and a system thereof are disclosed. According to an embodiment of the present invention, the anonymous payment method for the wireless charging of electric vehicles includes: a setting step of receiving a predetermined system parameter from an electric vehicle and setting a private key and a public key; a token recovery step of recovering a token from a bank server through a predetermined secure channel in the electric vehicle; a charging step of charging the electric vehicle based on the token of the electric vehicle at a service provider; and a reimbursement step of reimbursing the service provider for a cost for the charging from the bank server using the token and the hash chain of the electric vehicle. The anonymous payment method and the system thereof can be applied to the wireless charging of moving electric vehicles.

Description

Technical Field [0001] The present invention relates to an anonymous payment method and system for providing location privacy for wireless charging of an electric vehicle,

The present invention relates to an anonymous payment technology for wireless charging of an electric vehicle, and more particularly to an anonymous payment method which can be applied to wireless charging of an electric vehicle on the move, and which provides location privacy that can only be tracked by a trusted party And a system.

With the rapid increase in combustion engines, the limits of air pollution and fossil energy have become more important than ever before. Electric vehicles (EVs) are good alternatives to combustion engines to mitigate these problems.

Moreover, electric vehicles can be cost-effective if gasoline prices rise. And the most important reason to replace combustion engines with electric vehicles is the efficiency of the engines that use electricity. The combustion engine consumes only about 30% of the fuel tank and most energy is wasted on heating, while the efficiency of the electric engine is more than 80%. Thus, a plug-in electric vehicle (PEV) has been introduced.

However, the price and size of the battery is a major reason to stop using electrical power as a primary energy source for the vehicle. Combustion engines Vehicles can run for more than 310 miles without refueling, but the batteries have an average travel distance of 75 miles per charge. Further, the limitation on the mileage may also be caused by the shortage of the charging station. In addition, increasing the battery size to maximize power usage time will result in a significant increase in battery price.

In order to solve the problem of the PEV described above, wireless charging technology has been introduced. Charging on the go reduces the number of times the driver has to stop for recharging to provide convenience to the user and allows the industry to reduce the size of the battery to lower the cost of electric vehicles and provide more commercial viability.

Recently, the online electric vehicle (OLEV) project conducted by Korea Institute of Science and Technology (KAIST) was selected as one of the best innovations in 2010. In this project, the electric vehicle can be charged while away from the power transmitter installed under the road, so that the electric vehicle can be charged on the road, so that the recharging downtime is significantly reduced. The project also achieved 80% power transfer efficiency with an air gap of 10 cm between the underground coil and the power receiver of the vehicle.

However, since the battery capacity of a fully charged electric vehicle is much smaller than the battery capacity of a combustion engine, the battery capacity will further decrease as the size of the battery decreases. Thus, an electric vehicle needs to be charged frequently during the day, which may adversely affect the privacy of the location of the vehicle user.

In other words, an attacker can collect user location information during a pay-for-wireless charging process. Location records of electric vehicles can accumulate over time, can be related to the user's point of interest, and can be misused for crimes such as kidnapping or car theft.

Providing unconditional location privacy is actually undesirable because the vehicle must be tracked under certain conditions. Assuming the vehicle was stolen, the vehicle owner would like to track the vehicle. In addition, illegal vehicle users should be able to track by trusted parties. In these conditions, it is not appropriate to provide unconditional privacy.

Therefore, there is a need for an anonymous payment method that can be applied to wireless charging of an electric vehicle on the move, and provides location privacy that only trusted parties can track.

Embodiments of the present invention provide an anonymous payment method and system that can be applied to the wireless charging of an electric car on the go and provide location privacy that can only be tracked by a trusted party.

An anonymous payment method for wireless charging of an electric vehicle according to an embodiment of the present invention includes setting a private key and a public key by receiving preset system parameters in an electric vehicle; A token recovery step of recovering a token from a bank server through a predetermined secure channel in the electric vehicle; A charging step of charging the electric vehicle based on a token of the electric vehicle at a service provider; And a reimbursement step of using the token and the hash chain of the electric vehicle at the service provider to redeem the charge for the charge from the bank server.

The token retrieval step may receive the token including the signature for the public key from the bank server, the root of the hash chain associated with the token, the token identity, and the timestamp generated by the bank server.

Wherein the charging step is a step in which the message signed by the bank server is transmitted to the charging plate of the service provider by the user of the electric vehicle and the electric car is charged using the charging plate if the signature included in the message is valid. can do.

Wherein the charging step transmits a message including a charging fee, an identity and a time stamp of the charging plate from the service provider to the user when the signature included in the message is valid, And can receive the message signed with the private key to charge the electric vehicle.

If the signature included in the message is valid, the charging step provides the corresponding hash chain value to the service provider before charging using the corresponding charging plate, and if the charging is denied, provides a hash chain value corresponding to the corresponding charging plate I can not.

An anonymous payment system for wireless charging of an electric vehicle according to an embodiment of the present invention includes a setting unit configured to receive a predetermined system parameter from an electric vehicle and to set a private key and a public key; A withdrawing unit for withdrawing a token from a bank server through a predetermined secure channel in the electric vehicle; A charging unit for charging the electric vehicle based on a token of the electric vehicle at a service provider; And a reimbursement unit for reimbursing the charge for the charge from the bank server using the token and the hash chain of the electric vehicle at the service provider.

The collection unit may receive the token including the signature for the public key, the root of the hash chain associated with the token, the token identity, and the time stamp generated by the bank server from the bank server.

Wherein the charging unit receives a message signed by the bank server to the charging plate of the service provider by the user of the electric vehicle and charges the electric vehicle using the charging plate if the signature included in the message is valid .

Wherein the charging unit transmits a message including a charging fee, an identity and a time stamp of the charging plate from the service provider to the user when the signature included in the message is valid, and transmits, to the service provider, And receive the message signed with the key to charge the electric vehicle.

If the signature included in the message is valid, the charging unit provides the corresponding hash chain value to the service provider before charging using the corresponding charging plate. If the charging is denied, the charging unit provides the hash chain value corresponding to the charging plate .

According to embodiments of the present invention, it is possible to provide an anonymous payment method and system that can be applied to the wireless charging of an electric vehicle on the move, and provide location privacy that can only be tracked by a trusted party.

FIG. 1 illustrates an exemplary diagram for explaining a network model for explaining a technique according to the present invention.
2 is a flowchart illustrating an anonymous payment method for wireless charging of an electric vehicle according to an embodiment of the present invention.
3 is a flowchart illustrating an operation of charging the electric vehicle.
FIG. 4 shows an example for explaining the token collection process.
5 shows an example of a charging process.
6 illustrates a configuration of an anonymous payment system for wireless charging of an electric vehicle according to an embodiment of the present invention.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to or limited by the embodiments. In addition, the same reference numerals shown in the drawings denote the same members.

Embodiments of the present invention provide an anonymous payment method and system that can be applied to wireless charging of an electric vehicle on the move and provide location privacy that can only be tracked by a trusted party.

FIG. 1 illustrates an exemplary diagram for explaining a network model for explaining a technique according to the present invention.

As shown in FIG. 1, a network model for carrying out the present invention can be implemented using an OBU and a charging plate of an electric vehicle (EV) 130.

The electric vehicle 130 is connected to a token (not shown) using a vehicle ad-hoc network (VANET) via a road side unit (RSU) or a long-term evolution (LTE) token < / RTI >

The filling plate is installed under the road and a certain length of the road is covered with the filling plate. At this time, the charge plate may include a hardware section for communication and calculation purposes, and may include different charge segments that may be turned on or off for each vehicle, and the charge segments may include a certain amount It can have a charge.

The communication channel between the electric vehicle 130 and the charging plate may be based on a DSRC (Dedicated Short Range Communication) standard. Of course, the communication channel between the electric vehicle and the charging plate is not necessarily limited to the DSRC standard, and may include all communication channel standards that may be used between the electric vehicle and the charging plate.

The charging plate is connected to both the billing server and the power supply service, and the service provider can communicate with the bank server.

Here, the communication in the present invention can be performed through a secure channel using LTE over a mobile communication network.

The service provider 120 can confirm the token of the electric car, charge the electric car through the token check, and redeem the money at the bank 110 using the token and the hash chain received from the user.

The method and system according to the present invention using this network model will be described in detail with reference to FIG. 2 to FIG. 5. FIG.

. Before describing the method and system according to the present invention, the notation used in the present invention is as shown in Table 1 below, and the elements listed in Table 1 below may be a basic element of encryption used in the present invention .

notation Explanation s Service Provider Entity B Bank entity PD _j Token entity PD _i Entity of car i G, G _T Circular group of sequence q P Generator of G and G _T x Private key s Secret master key SK _i Secret key P _pub The corresponding public key PK ⁺ The corresponding public key a _i Signature sent by vehicle i h (.) One-way hash function like MD5 H (.) H: Map To Point hash function such as {0, 1} -> G (+ K _b , -K _b ) Bank's public and private key pairs APPENDIX _x (M)

로 메시지 M의 암호화Public key

Encryption of the message M sign _i (m) Digital signature of message m with private key of entity i N _p Number of Segments to Charge (+ K _j , -K _j ) EV

The public and private key pairs of the token H _j (? ₀ ) Hash chain for j ^th token of EV with root ω ₀ T _i Timestamp generated by entity i

Floor Function: Round real number (f) down to the next integer

Ceiling function: round real number (f) to the next integer

Actual primitives used in the present invention may include a hash chain, an ELGamal encryption and a BAT signature. In the present invention, a token method may be used for privacy preservation.

The token can be generated as shown in Equation (1) below.

[Equation 1]

Where ω ₀ is the root of the hash chain, + K _j is the public key of the token, and T _b is the time stamp defined by the bank for the token, Lt; / RTI >

이면 임의의 숫자는 개인 키로 선택되고

이 공개 키로 계산된다.It also uses ElGamal encryption through Elliptical Curve Cryptography (ECC) to allow electric vehicles to communicate with the bank and secretly receive tokens. Let G generated by element P be a periodic group of prime orders q,

The random number is selected as the private key

Lt; / RTI >

The present invention can improve verification efficiency using a Binary Authentication Tree (BAT) following identity-based encryption, and the BAT scheme can improve verification of multiple signatures within a limited interval.

After wireless charging of the electric vehicle, the service provider must verify several signatures of different vehicles within a limited time interval, and using BAT signatures can improve verification efficiency in the method according to the present invention.

은 바이너리 맵이라 가정하면, H(.)는 Map To Point 해시 함수이고, h(.)는 MD5와 같은 단방향 해시 함수이며,

은 비밀 키이고,

은 공개 키를 의미할 수 있다.G and G _T generated by P with the same order q are called cyclic multiplication groups,

H (.) Is a Map To Point hash function, h (.) Is a unidirectional hash function like MD5,

Is a secret key,

Can mean a public key.

를 미리 로드하고,

은 차량 i의 아이덴터티이다. 서명을 계산하기 위해,

이 무작위로 선택되어

를 계산한다. 비밀 키

를 사용하면 메시지

에 대한 서명

는 아래 <수학식 2>와 같이 계산될 수 있다.RSU or service provider is a common parameter

Lt; / RTI &gt;

Is the identity of the vehicle i. To calculate the signature,

This is randomly selected

. Secret key

Using the message

Signature for

Can be calculated as Equation (2) below.

&Quot; (2) &quot;

를 받은 사람은 서명

를 확인할 수 있다.Here, when an equation such as Equation (3) below is established,

The person who received the signature

.

&Quot; (3) &quot;

은 아래 <수학식 4>의 방정식에 의해 검증될 수 있다.Also, all signatures

Can be verified by the following equation (4).

&Quot; (4) &quot;

서명에서 가짜 서명을 찾는 것으로, 이 방식에서의 검증은 트리의 루트 노드(root node)에서 시작되고, 리프 노드(leaf-nodes)의 모든 서명에 대한 집계 서명인 루트 노드가 유효한 경우 리프 노드의 모든 서명은 유효하고, 그렇지 않으면 가짜 서명과 연관된 리프 노드를 찾기 위해 왼쪽 노드 또는 오른쪽 노드의 집합 서명을 검증한다. 이 검증 방법은 k 가짜 메시지의 경우에도 서명 확인의 복잡성을 줄일 수 있으며, 본 발명에서는 이러한 방법을 사용할 수 있다.Thus, group based authentication can significantly reduce the computational cost for a large number of aggregated signatures. Furthermore, an up-to-bottom binary verification scheme based on BAT signature

By looking for a fake signature in the signature, validation in this manner is initiated at the root node of the tree, and if the root node, which is an aggregate signature for all signatures of leaf-nodes, is valid, The signature is valid, otherwise the set signature of the left node or the right node is verified to find the leaf node associated with the fake signature. This verification method can reduce the complexity of signature verification even in the case of k-bogus messages, and this method can be used in the present invention.

The method according to the present invention is an off-line payment method, assuming that an electric vehicle can be connected to banks and service providers via RSUs or can communicate with banks and service providers on the move using LTE and cellular networks.

FIG. 2 is a flowchart illustrating an operation of an anonymous payment method for wireless charging of an electric vehicle according to an embodiment of the present invention, and FIG. 3 is a flowchart illustrating an operation of charging an electric vehicle.

Referring to FIGS. 2 and 3, a method according to an embodiment of the present invention includes a setting step S210, a token collection step S220, a charging step S230, and a repayment step S240.

In the method according to the invention, before using the wireless charging service on the move, each user has to open an account at the bank and the bank stores the public key of the identified user in the database. Before charging, the vehicle must have enough tokens, which can be withdrawn from the bank.

Describing each step of the method according to the invention, in the set-up phase, all entities receive the necessary system parameters and create the necessary keys, and the user connects the bank for account opening and depositing.

Since the vehicle is equipped with an OBU, the token can be connected to the bank server to receive a token on the move using the VANET via RSU or LTE in the mobile communication network.

In the charging phase, the service provider can identify the token and start the charging process. The token can be verified before the user connects to the service provider via the RSU and reaches the charging plate, and the charging phase begins when the vehicle reaches the charging plate.

At the redemption stage, the service provider can use the token and hash chain from the user to redeem the money from the bank.

Each step of the method according to the present invention comprising these steps will now be described in detail.

In the setting step S210,

At this stage, the initial authentication is done in an already trusted registrar (RA), all entities receive the necessary system parameters and create their own private and public keys.

Since the system follows the ECC method for encryption and decryption and the BAT method for signing, the corresponding public and private keys can be computed as described above, and the initial authentication can be performed between the electric cars and the bank have.

The user can then create an account at the bank to receive a token that can be used for charging services on the road. In addition, electric vehicles are equipped with tamper-proof modules that can perform safe calculations and keep keys secure.

In the token collection step S220,

와 아이덴터티가 미리 로드된다. 그런 다음, 도 4에 도시된 바와 같이 토큰 회수 단계가 시작된다. 도 4에 도시된 바와 같이, 토큰 회수 단계는 두 단계로 수행될 수 있다.When the setting step S210 is finished, the user can connect to the bank through the VANET or to the bank using the mobile communication network on the road whenever the user wants to receive the new token. In the present invention, it is assumed that a secure channel exists between an electric car and a bank server. When a user accesses the public key and verifies the signature using the bank's identity,

And the identity are preloaded. Then, the token recovery step is started as shown in FIG. As shown in FIG. 4, the token recovery step may be performed in two steps.

1) In the first step, a user with a valid account with the bank can request a token. And sends the message contained in the root and public key and identity PD _j of the hash chain? ₀ to the requested token. Moreover, the hash chain has a limited length of n defined by the maximum number of fill plate segments.

2) In the second step, the bank provides the user with a token consisting of the signature for the public key + K _j , the root of the hash chain ω ₀ associated with this token, the token identity, and the time stamp generated by the bank. The token expires after the timestamp, and if no token is consumed during this time, the user must request a new token.

The charging step (S230)

The charging step is performed in two sub-steps. It is assumed that the first sub-step is performed before the electric vehicle reaches the charging station, and that the electric vehicle and the service provider are able to exchange messages with the security channels that exist between them. The second sub-step occurs when the electric vehicle reaches the charge plate.

As shown in FIG. 5, steps 1 to 3 are steps for the service provider to confirm the token and the user, and the user can connect to the service provider through the RSU or using the mobile communication network. Steps 4 to 9 are performed when the user reaches the charging plate, where the user accesses the service provider through the charging plate. The whole process is described in detail as follows.

1) First, the user sends a message signed by the bank to the charging plate associated with the number of segments N _p needed for charging. Here, N _p may be a portion showing how much charge the electric vehicle requires. The service provider then validates the signature. Each token has its own identity and public key, so the service provider will not know the identity of the vehicle.

2) If the signature is valid, the service provider sends a message containing the cost, identity and timestamp of each segment of the fill plate to the user. Here, the time stamp can be used to prevent a reply attack.

3) The user signs this message with the private key of the token and sends it to the charging plate. Using this signed message, the service provider not only guarantees the authenticity of the message and token owner, but is also used to exchange tokens at the bank. The service provider verifies the validity of this message with the public key of the token.

과 관련된 해시 체인의 이전 값만 확인하여 각 값을 확인할 수 있다. 해시 체인 값이 유효한 경우, 서비스 공급자는 사용자가 첫 번째 세그먼트에서 충전을 받을 수 있도록 한다. 서비스 제공 업체가 이 세그먼트에서 사용자에게 충전하는 것을 거부하면, 사용자는 해시 체인의 다음 값이 서비스 제공 업체에 공개되지 않도록 주의해야 한다. 그러나, 사용자가 첫 번째 세그먼트로부터 충전을 받은 후에는, 다음 세그먼트로부터 충전을 받기 위해 해시 체인의 또 다른 값을 드러낸다. 이 프로세스는 사용자가

세그먼트에서 충전을 받을 때까지 계속된다.When the user reaches the charging plate, steps 4 to 9 are performed. Each segment must display one value in the hash chain sequentially before charging. Since different vehicles can enter the charging plate, each message is defined as the public key of the token. In addition, the charge plate hash functions and tokens

And can confirm each value by checking only the previous value of the hash chain associated with the hash chain. If the hash chain value is valid, the service provider allows the user to be charged in the first segment. If the service provider refuses to charge the user in this segment, the user should be careful that the next value of the hash chain is not disclosed to the service provider. However, after the user receives a charge from the first segment, it exposes another value in the hash chain to receive charge from the next segment. This process allows the user

Continue until the segment is charged.

As such, the charge stage uses a hash chain to improve fairness and reduce misunderstandings of service providers. However, it is less likely to refuse charging in the last segment (step 9) after receiving a hash chain from the user because the untrusted service provider has little benefit in deceiving a segment.

In the repayment step S240,

The service provider provides the bank with the message received in steps 1 and 3 of the charging phase with the hash chain to recover the token. In this message, Y containing K _j defines a token to be redeemed, and the hash chain indicates that the service provider has charged the user. Since the message contains the identity of the service provider, the bank can verify that this message belongs to the real person, which allows only certain service providers to redeem the token.

As described above, the method according to the embodiment of the present invention can be applied to the wireless charging of the electric vehicle on the move through the above-described process, and can provide position privacy that can be tracked only by the trusted party.

FIG. 6 shows a configuration of an anonymous payment system for wireless charging of an electric vehicle according to an embodiment of the present invention, and shows a configuration of a system capable of performing the processes of FIGS. 1 to 5 described above.

6, the system 600 according to the present invention includes a setting unit 610, a collecting unit 620, a charger 630, and a recharging unit 640.

The setting unit 610 receives a predetermined system parameter from the electric vehicle and sets a private key and a public key.

The withdrawal unit 620 retrieves the token from the bank server through a predetermined secure channel in the electric vehicle.

At this time, the collection unit 620 may receive a token including a signature for the public key, a root of the hash chain associated with the token, a token identity, and a timestamp generated by the bank server from the bank server

The charging unit 630 charges the electric vehicle based on the token of the electric vehicle at the service provider.

At this time, the charging unit 630 can charge the electric car using the charging plate if the message signed by the bank server is transmitted to the charging plate of the service provider by the user of the electric vehicle, and the signature included in the message is valid have.

At this time, when the signature included in the message is valid, the charging unit 630 transmits a message including the charging cost, the identity of the charging plate, and the time stamp to the user from the service provider, and the service provider transmits a message The electric vehicle can be charged.

If the signature included in the message is valid, the charger 630 provides the corresponding hash chain value to the service provider before charging using the corresponding charge plate. If the charge is rejected, the charger 630 provides the hash chain value corresponding to the corresponding charge plate I can not.

The redeeming unit 640 reimburses the charge for charging from the bank server using the token and hash chain of the electric vehicle at the service provider.

Although not described in the system of FIG. 6, it is obvious to those skilled in the art that the system of FIG. 6 may include all of the contents of FIGS. 1 through 5 described above.

The system or apparatus described above may be implemented as a hardware component, a software component, and / or a combination of hardware components and software components. For example, the systems, devices, and components described in the embodiments may be implemented in various forms such as, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable array ), A programmable logic unit (PLU), a microprocessor, or any other device capable of executing and responding to instructions. The processing device may execute an operating system (OS) and one or more software applications running on the operating system. The processing device may also access, store, manipulate, process, and generate data in response to execution of the software. For ease of understanding, the processing apparatus may be described as being used singly, but those skilled in the art will recognize that the processing apparatus may have a plurality of processing elements and / As shown in FIG. For example, the processing unit may comprise a plurality of processors or one processor and one controller. Other processing configurations are also possible, such as a parallel processor.

The software may include a computer program, code, instructions, or a combination of one or more of the foregoing, and may be configured to configure the processing device to operate as desired or to process it collectively or collectively Device can be commanded. The software and / or data may be in the form of any type of machine, component, physical device, virtual equipment, computer storage media, or device , Or may be permanently or temporarily embodied in a transmitted signal wave. The software may be distributed over a networked computer system and stored or executed in a distributed manner. The software and data may be stored on one or more computer readable recording media.

The method according to embodiments may be implemented in the form of a program instruction that may be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions to be recorded on the medium may be those specially designed and configured for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI &gt; or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

Claims (10)

A setting step of receiving a preset system parameter from the electric vehicle and setting a private key and a public key;
A token recovery step of recovering a token from a bank server through a predetermined secure channel in the electric vehicle;
A charging step of charging the electric vehicle based on a token of the electric vehicle at a service provider; And
Wherein the service provider uses a token and a hash chain of the electric vehicle to redeem the charge for the charge from the bank server,
And an anonymous payment method for wireless charging of an electric vehicle.
The method according to claim 1,
The token recovery step
The token including a signature for a public key from the bank server, a root of a hash chain associated with the token, a token identity, and a time stamp generated by the bank server. payment method.
The method according to claim 1,
The charging step
Characterized in that a message signed by the bank server is transmitted to a charge plate of the service provider by the user of the electric vehicle and the electric car is charged using the charge plate when the signature included in the message is valid An anonymous payment method for wireless charging of electric vehicles.
The method of claim 3,
The charging step
If the signature included in the message is valid, sending a message from the service provider to the user including a charging fee, an identity of the charging plate and a timestamp, and transmitting, by the service provider, And receiving the message to charge the electric vehicle.
The method of claim 3,
The charging step
When the signature included in the message is valid, the user provides the corresponding hash chain value to the service provider before the charge using the corresponding charge plate, and if the charge is rejected, does not provide the hash chain value corresponding to the charge plate An anonymous payment method for wireless charging of an electric vehicle.
A setting unit configured to receive a predetermined system parameter from the electric vehicle and to set a private key and a public key;
A withdrawing unit for withdrawing a token from a bank server through a predetermined secure channel in the electric vehicle;
A charging unit for charging the electric vehicle based on a token of the electric vehicle at a service provider; And
A charge server for receiving charge from the bank server using the token and the hash chain of the electric vehicle at the service provider,
An anonymous payment system for wireless charging of an electric vehicle.
The method according to claim 6,
The collecting unit
The token including a signature for a public key from the bank server, a root of a hash chain associated with the token, a token identity, and a time stamp generated by the bank server. Payment system.
The method according to claim 6,
The charging unit
Characterized in that a message signed by the bank server is transmitted to a charge plate of the service provider by the user of the electric vehicle and the electric car is charged using the charge plate when the signature included in the message is valid An anonymous payment system for wireless charging of electric cars.
9. The method of claim 8,
The charging unit
If the signature included in the message is valid, sending a message from the service provider to the user including a charging fee, an identity of the charging plate and a timestamp, and transmitting, by the service provider, Wherein the electric vehicle is charged by receiving the message.
9. The method of claim 8,
The charging unit
When the signature included in the message is valid, the user provides the corresponding hash chain value to the service provider before the charge using the corresponding charge plate, and if the charge is rejected, does not provide the hash chain value corresponding to the charge plate An anonymous payment system for the wireless charging of electric vehicles.

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