CN109598132A - Electric energy meter and its date storage method - Google Patents
Electric energy meter and its date storage method Download PDFInfo
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- CN109598132A CN109598132A CN201811387373.3A CN201811387373A CN109598132A CN 109598132 A CN109598132 A CN 109598132A CN 201811387373 A CN201811387373 A CN 201811387373A CN 109598132 A CN109598132 A CN 109598132A
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- data
- register
- encrypting
- electric energy
- energy meter
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/602—Providing cryptographic facilities or services
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
- G06F21/78—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data
- G06F21/79—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data in semiconductor storage media, e.g. directly-addressable memories
Abstract
The present invention provides a kind of electric energy meter and its date storage method, which includes electric energy meter ontology, micro-control unit and data storage cell, and micro-control unit includes register and data encryption/decryption element；Register stores the clear data of electric energy meter, and clear data is sent to data encrypting and deciphering unit；Data encrypting and deciphering unit encrypts clear data, obtains ciphertext data, and by ciphertext data return register；Ciphertext data are transmitted to data storage cell by register；When decryption, the ciphertext data of storage are passed through register transfer to data encrypting and deciphering unit by data storage cell；The ciphertext data are decrypted data encrypting and deciphering unit, the clear data after being decrypted；Clear data after last register storage decryption.The present invention in micro-control unit by being added data encrypting and deciphering unit, to carry out encryption and decryption processing to electric energy meter data, avoids criminal from carrying out camouflage to electric energy meter data and distorts, improve the reliability of data.
Description
Technical field
The present invention relates to electric energy meter technical field of data storage, more particularly, to a kind of electric energy meter and its data storage side
Method.
Background technique
Electric energy meter has used ESAM (Embedded Secure Access Module, embedded-type security control mould at present
Block) national secret algorithm, encryption has been carried out to the data on communication link, but the EEPROM inside electric energy meter
(Electrically Erasable Programmable read only memory, band electric erazable programmable read-write storage
Device) and the memory devices such as FLASH use stored in clear, still, with FPGA (Field Programmable Gate Array,
Field programmable gate array) application popularization, hacker can simulate the memory devices such as EEPROM and FLASH with FPGA, obtain
Then storing data structure can obtain the data information that modification is stored in EEPROM and FLASH easily, lead to information security
There are larger hidden dangers, and the reliability of data information is poor.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of electric energy meter and its date storage method, to improve electric energy meter
The reliability of data.
In a first aspect, the electric energy meter includes electric energy meter ontology, microcontroller list the embodiment of the invention provides a kind of electric energy meter
Member and data storage cell, wherein micro-control unit includes register and data encryption/decryption element；Register is for storing electric energy
Clear data is sent to data encrypting and deciphering unit by the clear data of table；Data encrypting and deciphering unit is for carrying out clear data
Encryption, obtains ciphertext data, ciphertext data is back to register；Register is also used to for ciphertext data being transmitted to data storage
Unit；Ciphertext data are transmitted to data encrypting and deciphering unit by register for storing ciphertext data by data storage cell；Number
It is also used to for ciphertext data being decrypted according to encryption/decryption element, the clear data after being decrypted；Register is also used to deposit
Clear data after storing up the decryption of data encrypting and deciphering unit transmission.
With reference to first aspect, the embodiment of the invention provides the first possible embodiments of first aspect, wherein on
Stating data encrypting and deciphering unit includes SOC chip.
With reference to first aspect, the embodiment of the invention provides second of possible embodiments of first aspect, wherein on
Data storage cell is stated using eeprom chip.
With reference to first aspect, the embodiment of the invention provides the third possible embodiments of first aspect, wherein on
The MT_SDA pin and MT_SCL pin for stating eeprom chip are connected with register respectively.
With reference to first aspect, the embodiment of the invention provides the 4th kind of possible embodiments of first aspect, wherein
Eeprom chip includes two open-drain pull-up resistors.
Second aspect, the embodiment of the present invention also provide a kind of date storage method of electric energy meter, and this method is applied to first
In the electric energy meter of aspect, this method comprises: the clear data of register storage electric energy meter, is sent to data for clear data and adds solution
Close unit；Data encrypting and deciphering unit encrypts clear data, obtains ciphertext data, and ciphertext data are back to register；
Ciphertext data are transmitted to data storage cell by register；Data storage cell stores ciphertext data, by register by ciphertext
Data are transmitted to data encrypting and deciphering unit；Ciphertext data are decrypted data encrypting and deciphering unit, bright after being decrypted
Literary data；Clear data after the decryption of register storing data encryption/decryption element transmission.
In conjunction with second aspect, the embodiment of the invention provides the first possible embodiments of second aspect, wherein number
Data interaction is carried out by register according to storage unit and data encrypting and deciphering unit.
In conjunction with second aspect, the embodiment of the invention provides second of possible embodiments of second aspect, wherein on
The method of stating further includes that the clear data after decryption is decrypted the clear data readable for register by data encrypting and deciphering unit.
In conjunction with second aspect, the embodiment of the invention provides the third possible embodiments of second aspect, wherein number
The step of according to encryption/decryption element encrypting, obtain ciphertext data the clear data that register is sent includes: data encrypting and deciphering
The clear data that unit receiving register is sent；Clear data is converted to Encryption Algorithm professional format by data encrypting and deciphering unit,
Clear data to be encrypted, ciphertext data are obtained.
In conjunction with second aspect, the embodiment of the invention provides the 4th kind of possible embodiments of second aspect, wherein number
Ciphertext data are decrypted according to encryption/decryption element, the step of clear data after being decrypted, comprising: data encrypting and deciphering
Unit receives ciphertext data；Data encrypting and deciphering unit is by ciphertext data conversion at the data of decrypted format；Data encrypting and deciphering unit
The data of decrypted format are decrypted, the clear data after being decrypted.
The embodiment of the present invention bring it is following the utility model has the advantages that
The present invention provides a kind of electric energy meter and its date storage method, which includes electric energy meter ontology, microcontroller
Unit and data storage cell, micro-control unit include register and data encryption/decryption element；Register stores the bright of electric energy meter
Literary data, and clear data is sent to data encrypting and deciphering unit；Data encrypting and deciphering unit encrypts clear data, obtains
Ciphertext data, and ciphertext data are back to register；Ciphertext data are transmitted to data storage cell by register；Data deciphering
When, the ciphertext data of storage are passed through register transfer to data encrypting and deciphering unit by data storage cell；Data encrypting and deciphering unit
The ciphertext data are decrypted, the clear data after being decrypted；Clear data after last register storage decryption.
The present invention, to carry out encryption and decryption processing to electric energy meter data, is kept away by the way that data encrypting and deciphering unit is added in micro-control unit
Exempt from criminal and electric energy meter data are carried out pretending to distort, improves the reliability of data.
Other features and advantages of the present invention will illustrate in the following description, alternatively, Partial Feature and advantage can be with
Deduce from specification or unambiguously determine, or by implementing above-mentioned technology of the invention it can be learnt that.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, better embodiment is cited below particularly, and match
Appended attached drawing is closed, is described in detail below.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of electric energy meter provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of another electric energy meter provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram of EEPROM in electric energy meter provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of another electric energy meter provided in an embodiment of the present invention；
Fig. 5 is a kind of flow chart of the date storage method of electric energy meter provided in an embodiment of the present invention；
Fig. 6 is the flow chart of the date storage method of another electric energy meter provided in an embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
At present the memory devices such as EEPROM, FLASH inside electric energy meter use stored in clear, hacker can by FPGA come
The memory devices such as EEPROM, FLASH are simulated, storing data structure is obtained, to distort the information in memory device, leads to information
Security presence larger hidden danger is based on this, and a kind of electric energy meter and its date storage method provided in an embodiment of the present invention, which can
In the scene of the data encryption and data deciphering that are applied to inside electric energy meter.For convenient for understanding the present embodiment, first
It describes in detail to a kind of electric energy meter disclosed in the embodiment of the present invention.
A kind of structural schematic diagram of electric energy meter shown in Figure 1；The electric energy meter includes electric energy meter ontology 10, microcontroller list
Member 11 and data storage cell 12, wherein micro-control unit 11 includes register 110 and data encryption/decryption element 111.
Above-mentioned register 110 is used to store the clear data of electric energy meter, and clear data is sent to data encrypting and deciphering unit
111；Data encrypting and deciphering unit 111 obtains ciphertext data, ciphertext data is back to deposit for encrypting clear data
Device 110；Register 110 is also used to ciphertext data being transmitted to data storage cell 12；Data storage cell 12 is close for storing
Ciphertext data are transmitted to data encrypting and deciphering unit 111 by register 110 by literary data；Data encrypting and deciphering unit 111 is also used to
Ciphertext data are decrypted, the clear data after being decrypted；Register 110 is also used to storing data encryption/decryption element
Clear data after the decryption of 111 transmission.
Above-mentioned micro-control unit (Microcontroller Unit, MCU) 11 usually can be described as one chip microcomputer again
Or single-chip microcontroller, it is that the frequency in central processing unit (Central Process Unit, CPU) is done appropriate reduction with specification,
And on a single chip by the integration of the perimeter interfaces such as memory (memory), counter (Timer), USB, A/D conversion, U, core is formed
The computer of chip level does various combination control for different applications.
Above-mentioned register 110 is a part of micro-control unit 11, and register 110 is usually the high speed of limited storage capacity
Depositing element, they can be used to temporary instruction, data and address etc.；Above-mentioned register is mainly used for storing the plaintext number of electric energy meter
According to the clear data after, ciphertext data and decryption.
Above-mentioned data encrypting and deciphering unit 111 is the unit being newly added in micro-control unit 11, is generallyd use with encryption and decryption
The chip of function is encrypted with the clear data to electric energy meter, and encrypted ciphertext data are decrypted, thus in plain text
Data and ciphertext data can be completed in single-chip microcontroller (being equivalent to above-mentioned micro-control unit), avoid hacker's interception from individually adding
The clear data of close chip and carry out camouflage altered data.
Above-mentioned data storage cell 12 is mainly used for the encrypted ciphertext data of the output of storage register 110；When useful
When family needs the data of reading power meters, the ciphertext data of storage are transmitted to register 110, register by data storage cell 12
The ciphertext data are transmitted to data encrypting and deciphering unit 111 again by 110 to be decrypted, and data encrypting and deciphering unit 111 will be decrypted
Clear data afterwards is being sent to register 110, at this point, user can be from the plaintext after reading power meters decryption in register
Data, the process entirely decrypted are also to complete in single-chip microcontroller, improve the reliability of data in this way.
The present invention provides a kind of electric energy meter, which includes that electric energy meter ontology, micro-control unit and data storage are single
Member, micro-control unit include register and data encryption/decryption element；Register stores the clear data of electric energy meter, and by plaintext number
According to being sent to data encrypting and deciphering unit；Data encrypting and deciphering unit encrypts clear data, obtains ciphertext data, and by ciphertext
Data are back to register；Ciphertext data are transmitted to data storage cell by register；When data deciphering, data storage cell will
The ciphertext data of storage pass through register transfer to data encrypting and deciphering unit；Data encrypting and deciphering unit solves the ciphertext data
Close processing, the clear data after being decrypted；Clear data after last register storage decryption.The present invention passes through in microcontroller
Data encrypting and deciphering unit is added in unit, to carry out encryption and decryption processing to electric energy meter data, avoids criminal to electric energy meter
Data carry out camouflage and distort, and improve the reliability of data.
The embodiment of the invention also provides another electric energy meter, realized on the basis of electric energy meter method shown in Fig. 1；Ginseng
The structural schematic diagram of another electric energy meter as shown in Figure 2；The electric energy meter includes electric energy meter ontology 10,11 sum number of micro-control unit
According to storage unit 12, wherein micro-control unit 11 includes register 110 and data encryption/decryption element 111.
Specifically, above-mentioned data encrypting and deciphering unit 111 includes SOC (System-on-a-Chip, system level chip) chip
20, SOC chip is also referred to as system on chip, says from narrow sense angle, usually the integrated chip of information system core, that is, will be
Critical component of uniting is integrated on one chip；It is said from broadest scope, SOC chip is a mini system.
Further, above-mentioned data storage cell 11 uses eeprom chip, and eeprom chip is usually band electric erasable and programmable
The storage chip that data are not lost after journey read-write memory and a kind of power down；The erasing of EEPROM is not needed by means of other
Equipment, it is to modify its content with electronic signal, and is do not need the number that will be stored using Byte as minimal modifications unit
It washes off and could be written according to whole；EEPROM is when being written data, it is still desirable to utilize certain program voltage, at this time, it is only necessary to
Content can be easily rewritten with the dedicated refresh program that manufacturer provides, so EEPROM belongs to twin voltage chip.
Further, the MT_SDA pin of above-mentioned eeprom chip and MT_SCL pin are connected with register 110 respectively, with
Carry out the interaction of data.
Be illustrated in figure 3 the schematic diagram of EEPROM in electric energy meter, in figure EEPROM include two open-drain pull-up resistor R32 and
R35, usual pull-up resistor is by a resistance clamper by uncertain signal in high level, while resistance also plays current limliting
Effect.
EEPROM includes 8 pins in Fig. 3, and pin 1,2 and 3 is EEPROM hardware address；Pin 4 is power ground interface；
Pin 5 and 6 is respectively MT_SDA pin and MT_SCL pin, is connected with the register 110 of electric energy meter and carries out data exchange, wherein
Pin 5 is also connected with pull-up resistor R35, and pin 6 is also connected with pull-up resistor R32,；Pin 7 is that write-protect enables foot；Pin 8
For power supply 3.3V power voltage supply mouth.
Specifically, which further includes current-voltage sampling, metering chip, clock circuit, clock RTC (Real-Time
Clock, real-time clock), ESAM (Embedded Secure Access Module, embedded safe control module), LED refer to
Show lamp, key, PLC (Power Line Carrier, power carrier communication), RS485 (Rcommended standard 485,
Proposed standard 485) interface and infrared interface, as shown in Figure 4.
Above-mentioned metering chip is connected with current-voltage sampling, clock circuit and micro-control unit 11 respectively；Micro-control unit
11 are connected with clock RTC, ESAM, LED light, key, PLC, RS485 interface and infrared interface.
Above-mentioned current-voltage sampling and metering chip are usually the circuit that electric energy meter is used to measure electricity consumption；Clock circuit is logical
It is usually used in time-division charge rate, such as the independent clock of time of rate electricity price, precision；When clock RTC usually can provide stable
Clock signal is subsequent conditioning circuit use；ESAM is commonly used in the encryption processing module of electric energy meter communication；LED light is commonly used in finger
Show pulse and the relay etc. of electric energy meter；Key turns over screen for what electric energy meter was shown；PLC, RS485 interface and infrared interface are usual
PERCOM peripheral communication for communication interface, for data.
Electric energy meter provided in this embodiment uses the SOC chip with encryption and decryption functions, and adopts in the data store
The safety of data transmission and the reliability of data itself are improved with eeprom chip to carry out encryption and decryption processing to data.
The embodiment of the invention also provides a kind of date storage method of electric energy meter, this method is applied in above-described embodiment
In the electric energy meter of offer.
A kind of flow chart of the date storage method of electric energy meter shown in Figure 5, the specific steps of this method, comprising:
Step S502, register store the clear data of electric energy meter, clear data are sent to data encrypting and deciphering unit.
The register of micro-control unit is mainly used for storing the data of electric energy meter, which is civilized data, and register will
The clear data is sent to data encrypting and deciphering unit and is encrypted, to ensure the safety of data.
Step S504, data encrypting and deciphering unit encrypt clear data, obtain ciphertext data, and ciphertext data are returned
To register.
Received clear data is converted into the dedicated format of Encryption Algorithm by data encrypting and deciphering unit, to carry out at encryption
Reason, and encrypted ciphertext data are transmitted to register.
Ciphertext data are transmitted to data storage cell by step S506, register.
Ciphertext data are transferred to the data storage cell of electric energy meter by above-mentioned storage drive, so that data storage cell storage should
Ciphertext data distort to prevent data of the criminal to data storage cell, improve the reliability of data.
Step S508, data storage cell store ciphertext data, ciphertext data are transmitted to data by register and add solution
Close unit.
When the data for thering is user or staff to need reading power meters, need to store data storage cell close
Literary data are decrypted, so that user or staff use；When data are decrypted, it is necessary first to deposit data
The ciphertext data of storage unit are transmitted to register, which is transmitted to data encrypting and deciphering unit again by register.
Ciphertext data are decrypted for step S510, data encrypting and deciphering unit, the clear data after being decrypted.
Data encrypting and deciphering unit receives the ciphertext data of register transfer, and data encrypting and deciphering unit turns the ciphertext data
Change the data of decrypted format into, the clear data data to be decrypted, after being decrypted.
Above-mentioned data storage cell carries out data interaction by register with data encrypting and deciphering unit, it is generally the case that number
According to the data interaction of storage unit and data encrypting and deciphering unit, need to be transmitted by intermediary's medium register.
Step S512, the clear data after the decryption of register storing data encryption/decryption element transmission.
Clear data after decryption is transmitted to register by data encrypting and deciphering unit, and register stores the plaintext after the decryption
Data, so that user or staff are read out.
The date storage method of electric energy meter provided in this embodiment, wherein the encryption process of entire data is all micro-
It is completed in control unit, avoids hacker and intercept the clear data of independent encryption chip and carry out camouflage altered data, improved
The safety of data information and the reliability of data.
The embodiment of the invention also provides the date storage method of another electric energy meter, this method is applied to above-described embodiment
In the electric energy meter of middle offer.
The date storage method of another electric energy meter shown in Figure 6, on the basis of this method method shown in Fig. 5
It realizes, the specific steps of this method, comprising:
Step S602, register store the clear data of electric energy meter, clear data are sent to data encrypting and deciphering unit.
Step S604, the clear data that data encrypting and deciphering unit receiving register is sent.
Step S606, clear data is converted to Encryption Algorithm professional format by data encrypting and deciphering unit, to clear data
It is encrypted, obtains ciphertext data.
Step S608, data encrypting and deciphering unit encrypt clear data, obtain ciphertext data, and ciphertext data are returned
To register.
Ciphertext data are transmitted to data storage cell by step S610, register.
Step S612, data storage cell store ciphertext data, ciphertext data are transmitted to data by register and add solution
Close unit.
When the data for thering is user or staff to need reading power meters, need to store data storage cell close
Literary data are decrypted, so that user or staff use.
Step S614, data encrypting and deciphering unit receive ciphertext data.
Step S616, data encrypting and deciphering unit is by ciphertext data conversion at the data of decrypted format.
The data of decrypted format are decrypted for step S618, data encrypting and deciphering unit, the plaintext after being decrypted
Data.
Clear data after decryption is decrypted the clear data readable for register by above-mentioned data encrypting and deciphering unit.
Step S620, the clear data after the decryption of register storing data encryption/decryption element transmission.
The date storage method data of electric energy meter provided in an embodiment of the present invention have with electric energy meter provided by the above embodiment
There is identical technical characteristic, so also can solve identical technical problem, reaches identical technical effect.
Present invention is generally directed to use peripheral data storage unit electric energy meter, by the number of electric energy meter and external memory unit
According to Encryption Algorithm has been used interchangeably, the data of electric energy meter storage are encrypted.Electric energy is utilized using the avoidable hacker of the present invention
The characteristic of plaintext transmission inside table, easily obtains and distorts storage content, to improve electric energy meter data reliability.
The computer program product of electric energy meter and its date storage method provided by the embodiment of the present invention, including store
The computer readable storage medium of program code, the instruction that said program code includes can be used for executing in previous methods embodiment
The method, specific implementation can be found in embodiment of the method, and details are not described herein.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description
And/or the specific work process of device, it can refer to corresponding processes in the foregoing method embodiment, details are not described herein.
In addition, in the description of the embodiment of the present invention unless specifically defined or limited otherwise, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a
People's computer, server or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention.
And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
The various media that can store program code such as reservoir (RAM, Random Access Memory), magnetic or disk.
Finally, it should be noted that embodiment described above, only a specific embodiment of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, those skilled in the art should understand that: anyone skilled in the art
In the technical scope disclosed by the present invention, it can still modify to technical solution documented by previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover in protection of the invention
Within the scope of.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. a kind of electric energy meter, which is characterized in that the electric energy meter includes that electric energy meter ontology, micro-control unit and data storage are single
Member, wherein the micro-control unit includes register and data encryption/decryption element；
The register is used to store the clear data of electric energy meter, and the clear data is sent to the data encrypting and deciphering list
Member；
The data encrypting and deciphering unit obtains ciphertext data, by the ciphertext data for encrypting the clear data
It is back to the register；
The register is also used to the ciphertext data being transmitted to the data storage cell；
The ciphertext data are transmitted to institute by the register for storing the ciphertext data by the data storage cell
State data encrypting and deciphering unit；
The data encrypting and deciphering unit is also used to for the ciphertext data being decrypted, the clear data after being decrypted；
The register is also used to store the clear data after the decryption of the data encrypting and deciphering unit transmission.
2. electric energy meter according to claim 1, which is characterized in that the data encrypting and deciphering unit includes SOC chip.
3. electric energy meter according to claim 1, which is characterized in that the data storage cell uses eeprom chip.
4. electric energy meter according to claim 3, which is characterized in that the MT_SDA pin and MT_SCL of the eeprom chip
Pin is connected with the register respectively.
5. electric energy meter according to claim 3, which is characterized in that the eeprom chip includes two open-drain pull-up electricity
Resistance.
6. a kind of date storage method of electric energy meter, which is characterized in that the method is applied to claim 1-5 any one institute
In the electric energy meter stated, which comprises
Register stores the clear data of electric energy meter, and the clear data is sent to data encrypting and deciphering unit；
The data encrypting and deciphering unit encrypts the clear data, obtains ciphertext data, and the ciphertext data are returned
To the register；
The ciphertext data are transmitted to data storage cell by the register；
The data storage cell stores the ciphertext data, and the ciphertext data are transmitted to the number by the register
According to encryption/decryption element；
The ciphertext data are decrypted the data encrypting and deciphering unit, the clear data after being decrypted；
The register stores the clear data after the decryption of the data encrypting and deciphering unit transmission.
7. according to the method described in claim 6, it is characterized in that, the method also includes the data storage cell and numbers
Data interaction is carried out by the register according to encryption/decryption element.
8. according to the method described in claim 6, it is characterized in that, the method also includes: the data encrypting and deciphering unit will
The clear data after decryption decrypts the clear data readable for the register.
9. according to the method described in claim 6, it is characterized in that, what the data encrypting and deciphering unit sent the register
The step of clear data is encrypted, and ciphertext data are obtained include:
The data encrypting and deciphering unit receives the clear data that the register is sent；
The clear data is converted to Encryption Algorithm professional format by the data encrypting and deciphering unit, with to the clear data into
Row encryption obtains the ciphertext data.
10. according to the method described in claim 6, it is characterized in that, the data encrypting and deciphering unit by the ciphertext data into
The step of row decryption processing, clear data after being decrypted, comprising:
The data encrypting and deciphering unit receives the ciphertext data；
The data encrypting and deciphering unit is by the ciphertext data conversion at the data of decrypted format；
The data of the decrypted format are decrypted the data encrypting and deciphering unit, the clear data after being decrypted.
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| CN201811387373.3A CN109598132A (en) | 2018-11-20 | 2018-11-20 | Electric energy meter and its date storage method |
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| CN201811387373.3A CN109598132A (en) | 2018-11-20 | 2018-11-20 | Electric energy meter and its date storage method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111339573A (en) * | 2020-03-10 | 2020-06-26 | 江苏林洋能源股份有限公司 | Method for realizing data tampering detection of nonvolatile memory by adopting hybrid encryption algorithm |
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| CN111339573A (en) * | 2020-03-10 | 2020-06-26 | 江苏林洋能源股份有限公司 | Method for realizing data tampering detection of nonvolatile memory by adopting hybrid encryption algorithm |
| CN111339573B (en) * | 2020-03-10 | 2023-04-07 | 江苏林洋能源股份有限公司 | Method for realizing data tampering detection of nonvolatile memory by adopting hybrid encryption algorithm |
| CN114244511A (en) * | 2021-12-22 | 2022-03-25 | 杭州万高科技股份有限公司 | Encryption and decryption module and meter reading system suitable for DLMS/COSEM communication protocol |
| CN114244511B (en) * | 2021-12-22 | 2023-06-09 | 杭州万高科技股份有限公司 | Encryption and decryption module and meter reading system suitable for DLMS/COSEM communication protocol |
| WO2023115692A1 (en) * | 2021-12-22 | 2023-06-29 | 杭州万高科技股份有限公司 | Encryption/decryption module and meter reading system suitable for dlms/cosem communication protocol |
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