CN105915514B - Merging unit encryption verification device and method for metering - Google Patents
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Abstract
The invention relates to a metering merging unit encryption verification device and a metering merging unit encryption verification method, which comprise an SV message analysis module connected with the output end of the metering merging unit, a data processing module connected with the SV message analysis module, a protocol conversion module connected with the data processing module and an encryption card connected with the data processing module, wherein the protocol conversion module is connected with the input end of the metering merging unit. The invention verifies whether the encrypted data in the merging unit for metering is called or not, verifies the encryption mechanism, prevents the data in the merging unit for metering from being modified, and ensures the metering accuracy and fairness of the merging unit for metering.
Description
Technical Field
The invention relates to the technical field of power equipment encryption, in particular to a merging unit encryption verification device and method for metering.
Background
And a Merging Unit (MU) merges and synchronously processes the electric quantity transmitted by the primary mutual inductor, and forwards the processed digital signal to a device used by the bay level equipment according to a specific format. The merging unit is an interface device of an electronic current transformer and an electronic voltage transformer, realizes sharing and digitization of process layer data to a certain extent, and plays an important role as a data source of equipment of a digital substation bay level and a station control level conforming to the IEC61850 standard. With the popularization of the automation technology of the digital substation and the engineering construction, the requirements on the functions and the performances of the combining unit are higher and higher.
Because the internal core data of the merging unit or the merging unit for metering can be changed, the error of the merging unit or the merging unit for metering after being calibrated by the metering calibration mechanism can be changed at will, the measurement precision of an instrument is directly influenced, the magnitude value cannot be accurately transmitted, and meanwhile, the metering data is transmitted by adopting a plaintext, so that a great risk exists. Therefore, the digital encryption technology is added in the merging unit or the merging unit for metering, and under the condition of no legal authorization, a manufacturer or an individual of the merging unit does not have the right to modify the error model parameters in the merging unit, so that the error model parameters are prevented from being modified artificially to cause error change. In order to verify the reliability and the applicability of the digital encryption technology, the invention provides a device and a method for encrypting and verifying a merging unit for metering, which can authorize the parameter modification authority of an error model in the merging unit for metering, verify whether the encrypted error model parameter is called by the merging unit for metering, and realize the functions of relevant key issuing, authorization management, key exchange and the like.
Disclosure of Invention
Therefore, an object of the present invention is to provide a merging unit encryption verification apparatus and method for metering, which can authorize the merging unit for metering to change the core data, check whether the encrypted core data is called by the merging unit for metering, and implement the related functions of key issuance, authorization management, key exchange, etc.
In order to solve the technical problem, the encryption verification device for the merging unit for metering comprises an SV message analysis module connected with the output end of the merging unit for metering, a data processing module connected with the SV message analysis module, a protocol conversion module connected with the data processing module and an encryption card connected with the data processing module, wherein the protocol conversion module is connected with the input end of the merging unit for metering, after the data processing module is connected with the merging unit for metering through the protocol conversion module and the SV message analysis module, the data processing module exchanges a secret key with the merging unit for metering to realize parameter modification authorization, the data processing module reads an internal error model parameter value of the merging unit for metering, and the merging unit for metering outputs SV message signals, the SV message analysis module receives SV message signals output by the merging unit for metering and analyzes the SV message signals, the data processing module is used for receiving the analyzed SV message signals, and calculates the error model parameter value according to the analyzed SV message signal, changes any parameter value in the error model, and encrypts the parameter value, and sending the data to the merging unit for metering through the protocol conversion module for storage, receiving SV message signals output by the merging unit for metering again by the SV message analysis module, analyzing the SV message signals, receiving the analyzed SV message signals again by the data processing module, and comprehensively judging whether the merging unit for metering calls the encrypted error model parameter value or not according to the error model parameter values before and after encryption and the SV message signal output by the merging unit for metering.
In an embodiment of the present invention, the SV message parsing module employs a 32-bit single chip microcomputer, and the 32-bit single chip microcomputer is externally provided with a network port chip, and is configured to receive the SV message output by the merging unit for metering.
In one embodiment of the invention, the SV message contains sampled values of an electrical quantity of the primary-side transformer.
In an embodiment of the present invention, the data processing module includes a CPU module, and the CPU module receives an output signal of the SV message parsing module, where the output signal includes an electrical quantity sampling value of a primary-side transformer.
In an embodiment of the present invention, the protocol conversion module employs an interface protocol converter, and the interface protocol converter is connected to an input end of the merging unit for metering.
In one embodiment of the invention, the encryption card comprises an ESAM security module, and an encryption chip and a memory are configured in the ESAM security module.
In an embodiment of the invention, the system further comprises a human-computer interaction module for displaying the electric quantity sampling value of the primary-side transformer and the error of the electric quantity sampling value, and the human-computer interaction module is connected with the data processing module.
The invention also provides a metering merging unit encryption verification method, which carries out encryption verification on the metering merging unit according to the metering merging unit encryption verification device and comprises the following steps: step S1: after a data processing module is connected with a merging unit for metering through a protocol conversion module and an SV message analysis module, the data processing module exchanges a key with the merging unit for metering to realize parameter modification authorization, the data processing module reads an internal error model parameter value of the merging unit for metering, and the merging unit for metering outputs an SV message signal; step S2: an SV message analysis module receives SV message signals output by the merging unit for metering and analyzes the SV message signals; step S3: the data processing module is used for receiving the analyzed SV message signal, calculating an error model parameter value according to the analyzed SV message signal, changing any parameter value in an error model, encrypting the parameter value, and sending the parameter value to the merging unit for metering through the protocol conversion module for storage; step S4: the SV message analysis module receives SV message signals output by the merging unit for metering again and analyzes the SV message signals; step S5: and the data processing module receives the analyzed SV message signal again, and comprehensively judges whether the merging unit for metering calls the encrypted error model parameter value or not according to the error model parameter value before and after encryption and the SV message signal output by the merging unit for metering.
In one embodiment of the invention, the error model parameter values and the final judgment result are displayed and read through a human-computer interaction module.
Compared with the prior art, the technical scheme of the invention has the following advantages:
the encryption verification device and method for the merging unit for metering are applied to a digital metering system of an electric power system, the parameter change permission of an error model in the merging unit for metering is authorized, whether the encrypted error model parameter value is called by the merging unit for metering can be checked, functions such as related secret key issuing, authorization management, secret key exchange and the like are realized, the metering accuracy and fairness of the merging unit for metering are ensured, and a foundation is laid for accelerating the construction of the digital metering system.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the embodiments of the present disclosure taken in conjunction with the accompanying drawings, in which
Fig. 1 is a schematic connection diagram of a metering merging unit encryption verification device according to the present invention.
Detailed Description
The first embodiment is as follows:
referring to fig. 1, the present embodiment provides an encryption verification apparatus for a merging unit for metering, including an SV message parsing module 11 connected to an output end of a merging unit for metering 10, a data processing module 12 connected to the SV message parsing module 11, a protocol conversion module 13 connected to the data processing module 12, and an encryption card 14 connected to the data processing module 12, where the protocol conversion module 13 is connected to an input end of the merging unit for metering 10.
The above is the core technology field of the present invention, and the merging unit encryption verification apparatus for metering of the present invention includes an SV message parsing module 11, a data processing module 12, a protocol conversion module 13, and an encryption card 14, wherein an output end of the merging unit 10 for metering is connected to the SV message parsing module 11, the SV message parsing module 11 is configured to receive an SV message output by the merging unit 10 for metering and parse the SV message, the SV message parsing module 11 is connected to the data processing module 12, the SV message parsing module 11 sends the parsed SV message to the data processing module 12, the data processing module 12 is configured to receive the parsed SV message and calculate an error model parameter value according to the parsed SV message, the data processing module 12 is connected to the encryption card 14, and the encryption card 14 is configured to receive an error model parameter value sent by the data processing module 12 and enter the parameter value into the encryption card 14 Encrypting, returning the encrypted error model parameter value to the data processing module 12, connecting the data processing module 12 to the protocol conversion module 13, sending the encrypted error model parameter value to the protocol conversion module 13 by the data processing module 12, connecting the protocol conversion module 13 to the input end of the merging unit for metering 10, converting the encrypted error model parameter value into an FT3 message conforming to the communication protocol format of the merging unit for metering 10 by the protocol conversion module 13, sending the FT3 message to the merging unit for metering 10, decrypting the received FT3 message by the encryption card 14 to obtain the parameter value, thereby checking whether the encrypted error model parameter value is called by the merging unit for metering and authorizing the error model parameter change authority encrypted in the merging unit for metering, and the functions of relevant key issuing, authorization management, key exchange and the like are realized, the error model parameters in the merging unit for metering are prevented from being modified at will by a manufacturer or a user of the merging unit for metering, the accuracy and the fairness of the merging unit for metering are favorably ensured, and a foundation is laid for accelerating the construction of a digital metering system.
The SV message analysis module 11 adopts a 32-bit single chip microcomputer, the 32-bit single chip microcomputer is externally provided with a network port chip and is used for receiving the SV message output by the merging unit 10 for metering, the SV message analysis module 11 is connected with the data processing module 12, and the SV message analysis module 11 sends the analyzed SV message to the data processing module 12. In this embodiment, the SV message includes an electrical quantity sampling value of the primary-side transformer.
The data processing module 12 includes a CPU module, the CPU module receives an output signal of the SV message analyzing module, the output signal includes an electrical quantity sampling value of the primary-side transformer, in this embodiment, a technician calculates an error of the electrical quantity sampling value according to an actual working condition requirement, and the data processing module 12 sends the error to the protocol conversion module 13.
The encryption card 14 includes an ESAM security module, an encryption chip and a memory are configured in the ESAM security module, after receiving the error model parameter value sent by the data processing module 12, the encryption card 14 encrypts or decrypts the error model parameter value, and the memory is used for storing the parameter value.
In this embodiment, the encryption card 14 uses an ESAM security module as a hardware platform, and the security performance of the encryption card reaches the international itsee 4 level standard, and has the functions of detection prevention, attack resistance and self-destruction resistance. Specifically, the ESAM security module is a security chip which is dedicated to the power system and has an encryption and decryption function, can support algorithms such as SM1, SM2, SM3 and SM4, and has functions of encryption, decryption, signature, MAC calculation and MAC verification. The ESAM security module is a storage chip of the device key, the device key is distributed through a national power grid electricity consumption information collection key management system, the number of the keys stored in the device corresponds to the function of the device, and the management of the device authority can be realized through the management of the device key, so that the ESAM security module can ensure the confidentiality and the authenticity of transmitted data. The data processing module 12 sends the data plaintext to the ESAM module, and the ESAM module encrypts the data plaintext or calculates the MAC using the SM1 algorithm, and returns the encrypted ciphertext or the calculated MAC value to the data processing module 12.
The protocol conversion module 13 adopts an interface protocol converter, the interface protocol converter is connected to the input end of the merging unit 10 for metering, the interface protocol converter communicates with the merging unit 10 for metering, converts the encrypted error into an FT3 message conforming to the communication protocol format of the merging unit 10 for metering, sends the FT3 message to the merging unit 10 for metering, and the encryption card 14 decrypts the received FT3 message to obtain the error of the electrical quantity sampling value, thereby checking whether the encrypted error model parameter is called by the merging unit for metering, authorizing the core data modification authority in the merging unit for metering, and realizing the functions of related key issuance, authorization management, key exchange, and the like.
In this embodiment, the merging unit encryption verification device for metering further includes a human-computer interaction module 15, where the human-computer interaction module 15 is configured to display an electrical quantity sampling value of the primary-side transformer and an error of the electrical quantity sampling value, and the human-computer interaction module 15 is connected to the data processing module 12.
Example two:
the embodiment provides a merging unit encryption verification method for metering, which comprises the following steps: step S1: after the data processing module 12 is connected with the merging unit 10 for metering through the protocol conversion module 13, the data processing module 12 exchanges a key with the merging unit 10 for metering to realize error model parameter modification authorization, and the data processing module 12 reads an error model parameter in the merging unit 10 for metering; step S2: an SV message analysis module 11 receives an output signal of the merging unit 10 for metering; step S3: the data processing module 12 changes any parameter in the error model, completes data encryption, and sends the encrypted data to the merging unit for metering 10 through the protocol conversion module 13 for storage; step S4: the SV message parsing module 11 receives the output signal of the merging unit for metering 10 again; step S5: the data processing module 12 comprehensively determines whether the merging unit 10 for metering calls the encrypted error model parameter according to the error model parameter and the output signal of the merging unit for metering.
In the encryption verification method for a merging unit for metering in this embodiment, in step S1, after the data processing module 12 establishes a connection with the merging unit for metering 10 through the protocol conversion module 13, the data processing module 12 performs key exchange with the merging unit for metering 10 to implement parameter modification authorization and verify the reliability of encryption, and the data processing module 12 reads an error model parameter inside the merging unit for metering 10; in step S2, the SV message parsing module 11 receives an output signal of the merging unit for metering 10, where the output signal includes an electrical quantity sampling value of the primary-side transformer; in step S3, the data processing module 12 changes any parameter in the error model, and completes data encryption to form encrypted error model parameters, where the data is sent to the encryption card 14 to complete data encryption, and sent to the merging unit for metering 10 through the protocol conversion module 13 to be stored, and restarts the merging unit for metering 10; in step S4, the SV message parsing module 11 receives the output signal of the merging unit for metering 10 again, where the output signal includes the electrical quantity sampling value of the primary-side transformer; in step S5, the data processing module 12 comprehensively determines whether the merging unit 10 for metering calls the encrypted error model parameter according to the error model parameter before and after encryption and in combination with a change in the sampling value of the electrical quantity of the primary-side transformer, so as to check whether the encrypted error model parameter is called by the merging unit for metering, authorize the parameter change authority of the error model in the merging unit for metering, and implement functions such as related key issuance, authorization management, and key exchange, so as to prevent a manufacturer or a user of the merging unit for metering from modifying the error model parameter in the merging unit for metering at will, thereby being beneficial to ensuring the accuracy and fairness of the merging unit for metering, and laying a foundation for accelerating the construction of the digital metering system.
In this embodiment, the error model parameter, the detection progress, the sampling value of the electrical quantity of the primary-side transformer, and the final determination result are displayed and read by the human-computer interaction module 15.
In summary, the technical scheme of the invention has the following advantages:
1. the encryption verification device for the merging unit for metering comprises an SV message analyzing module, a data processing module, a protocol conversion module and an encryption card, wherein the output end of the merging unit for metering is connected with the SV message analyzing module, the SV message analyzing module is used for receiving SV messages output by the merging unit for metering and analyzing the SV messages, the SV message analyzing module is connected with the data processing module, the SV message analyzing module sends the analyzed SV messages to the data processing module, the data processing module is used for receiving the analyzed SV messages and calculating error model parameters according to the analyzed SV messages, the data processing module is connected with the encryption card, and the encryption card is used for receiving error model parameters sent by the data processing module and encrypting the error model parameters, and the encrypted error model parameters are returned to the data processing module, the data processing module is connected with the protocol conversion module, the data processing module sends the encrypted error model parameters to the protocol conversion module, the protocol conversion module is connected with the input end of the merging unit for metering, converts the encrypted error model parameters into an FT3 message in accordance with the communication protocol format of the merging unit for metering, and the FT3 message is sent to the merging unit for measurement, and the encryption card decrypts the received FT3 message to obtain an error model parameter, therefore, the error model parameters in the merging unit for metering are prevented from being modified at will by a manufacturer or a user of the merging unit for metering, the accuracy and the fairness of the metering of the merging unit for metering are favorably ensured, and a foundation is laid for accelerating the construction of a digital metering system.
2. According to the merging unit encryption verification device for metering, the encryption card adopts an ESAM security module as a hardware platform, the security performance of the encryption card reaches the international ITSECE4 level standard, and the merging unit encryption verification device for metering has the functions of detection prevention, attack resistance and self-destruction resistance. Specifically, the ESAM security module is a security chip which is dedicated to the power system and has an encryption and decryption function, can support algorithms such as SM1, SM2, SM3 and SM4, and has functions of encryption, decryption, signature, MAC calculation and MAC verification.
3. The encryption verification method of the merging unit for metering can realize the verification of whether the encrypted error model parameters are called by the merging unit for metering, authorize the change authority of the error model parameters in the merging unit for metering, realize the functions of related secret key issuing, authorization management, secret key exchange and the like, prevent manufacturers or users of the merging unit for metering from randomly modifying the error model parameters in the merging unit for metering, be favorable for ensuring the metering accuracy and fairness of the merging unit for metering and lay the foundation for accelerating the construction of a digital metering system.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (9)
1. A merging unit encryption verification device for metering is characterized in that: the device comprises an SV message analysis module connected with the output end of a merging unit for metering, a data processing module connected with the SV message analysis module, a protocol conversion module connected with the data processing module and an encryption card connected with the data processing module, wherein the protocol conversion module is connected with the input end of the merging unit for metering, after the data processing module is connected with the merging unit for metering through the protocol conversion module and the SV message analysis module, the data processing module exchanges keys with the merging unit for metering to realize parameter modification authorization, the data processing module reads the parameter value of an internal error model of the merging unit for metering, the merging unit for metering outputs SV message signals, the SV message analysis module receives the SV message signals output by the merging unit for metering and analyzes the SV message signals, the data processing module is used for receiving the analyzed SV message signal, calculating an error model parameter value according to the analyzed SV message signal, changing any parameter value in an error model, encrypting the parameter value, sending the parameter value to the merging unit for metering through the protocol conversion module for storage, receiving the SV message signal output by the merging unit for metering again by the SV message analyzing module and analyzing the SV message signal, receiving the analyzed SV message signal again by the data processing module, and comprehensively judging whether the merging unit for metering calls the encrypted error model parameter value or not according to the error model parameter value before encryption and after encryption and the SV message signal output by the merging unit for metering.
2. The merging-unit encryption verification apparatus for metering according to claim 1, characterized in that: and the SV message analysis module adopts a 32-bit singlechip, and the 32-bit singlechip is externally provided with a network port chip and is used for receiving the SV message output by the merging unit for metering.
3. The merging-unit encryption verification apparatus for metering according to claim 2, characterized in that: and the SV message contains an electrical quantity sampling value of the primary side transformer.
4. The merging-unit encryption verification apparatus for metering according to claim 3, characterized in that: the data processing module comprises a CPU module, the CPU module receives an output signal of the SV message analyzing module, and the output signal comprises an electric quantity sampling value of the primary side mutual inductor.
5. The merging-unit encryption verification apparatus for metering according to claim 1, characterized in that: the protocol conversion module adopts an interface protocol converter, and the interface protocol converter is connected with the input end of the merging unit for metering.
6. The merging-unit encryption verification apparatus for metering according to claim 1, characterized in that: the encryption card comprises an ESAM security module, and an encryption chip and a memory are configured in the ESAM security module.
7. The merging-unit encryption verification apparatus for metering according to claim 1, characterized in that: the system also comprises a human-computer interaction module used for displaying the electric quantity sampling value of the primary side mutual inductor and the error of the electric quantity sampling value, and the human-computer interaction module is connected with the data processing module.
8. A merging-unit encryption verification method for metering, which is used for carrying out encryption verification on a merging unit for metering according to the merging-unit encryption verification device for metering in any one of claims 1 to 7, and is characterized by comprising the following steps:
step S1: after a data processing module is connected with a merging unit for metering through a protocol conversion module and an SV message analysis module, the data processing module exchanges a key with the merging unit for metering to realize parameter modification authorization, the data processing module reads an internal error model parameter value of the merging unit for metering, and the merging unit for metering outputs an SV message signal;
step S2: an SV message analysis module receives SV message signals output by the merging unit for metering and analyzes the SV message signals;
step S3: the data processing module is used for receiving the analyzed SV message signal, calculating an error model parameter value according to the analyzed SV message signal, changing any parameter value in an error model, encrypting the parameter value, and sending the parameter value to the merging unit for metering through the protocol conversion module for storage;
step S4: the SV message analysis module receives SV message signals output by the merging unit for metering again and analyzes the SV message signals;
step S5: and the data processing module receives the analyzed SV message signal again, and comprehensively judges whether the merging unit for metering calls the encrypted error model parameter value or not according to the error model parameter value before and after encryption and the SV message signal output by the merging unit for metering.
9. The merging-unit encryption verification method for metering according to claim 8, characterized in that: and the error model parameter values and the final judgment result are displayed and read through a human-computer interaction module.
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| EP0503119A1 (en) * | 1991-03-14 | 1992-09-16 | Omnisec Ag | Public key cryptographic system using elliptic curves over rings |
| CN105099656A (en) * | 2015-08-20 | 2015-11-25 | 中国电力科学研究院 | Encrypted merging unit for metering |
| CN204926098U (en) * | 2015-08-20 | 2015-12-30 | 中国电力科学研究院 | Modifier is prevented with merging cells core data to measurement |
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