KR102359509B1 - Apparatus for generating seed of random number and method thereof - Google Patents

Abstract

Disclosed are an apparatus for generating a seed for random numbers and a method therefor. A random number seed generator according to the present invention includes: a measuring unit for measuring power states of a load side and an incoming side in a digital watt hour meter; an AD converter that converts the measurement data measured by the measurement unit into digital data; and a seed generator configured to determine a measurement point for extracting a source value from the measurement data converted through the AD converter to extract the source value, and to generate a seed value based on the extracted source value.

Description

Apparatus for generating a seed for random numbers and a method therefor

The present invention relates to an apparatus for generating a seed for random numbers and a method therefor, and more particularly, a seed value for extracting a random number used for security and communication in a digital watt-hour meter of an AMI system based on the power value using a power measurement sensor It relates to an apparatus and method for generating seeds for random numbers that are generated by themselves and supplied to related modules.

In general, the AMI system (Advanced Metering Infrastructure System) remotely reads the usage of various meters installed in consumers who consume energy, such as electricity, gas, water, hot water, and heat, while automatically collecting the information from the upper system. , it means a two-way communication infrastructure that analyzes and processes and provides it back to consumers.

The AMI system is the next-generation version of the AMR system (Advanced Meter Reading System) for simply collecting the energy usage information of the existing consumers from the utility company, adding a two-way communication function that provides energy usage information to the consumers. As an energy metering infrastructure, it is being widely introduced in the electric power field thanks to the activation of smart grid introduction worldwide.

In such a typical AMI system, the amount of usage of the electronic watt-hour meter installed on the consumer side is collected from the Data Concentration Unit (DCU) using the AMI slave modem and the master modem, and then transmitted to the AMI server.

Here, the AMI server manages configuration information of meter reading devices, such as electronic watt-hour meters and modems installed for meter reading, acquires and stores meter reading data, and provides usage information of each customer through a web browser. In addition, the data concentrator (DCU) is a device that collects the meter reading data of the consumer-side electronic watt-hour meter in the AMI system. The electronic watt-hour meter is a watt-hour meter that measures and stores the electricity consumption of consumers and provides information through communication.

The background technology of the present invention is disclosed in Korean Patent Application Laid-Open No. 2014-0120203 (published on October 13, 2014, power information measuring device of AMI system).

In this way, the AMI system transmits the meter reading data periodically or aperiodically to the AMI server. Encryption technology is applied to the communication protocol for the transmission and reception of the meter reading data to prevent charge manipulation by a third party and unauthorized collection of personal information. preventing it from happening.

Therefore, the digital watt-hour meter of the AMI system can be basically divided into a module that measures customer power usage information in real time, a module that protects and encrypts data, a communication module for data transmission, and a main module that manages the entire system.

For each of these modules, it is essential to extract and utilize the random number value mentioned in the digital system. For example, the security module generates and uses a random number to generate an encryption key, the communication module uses the random number to select non-overlapping channels, and furthermore, in the artificial intelligence, random numbers are generated to increase learning of various patterns. use.

In order to generate such a random number, a true random number generator (TRNG), a pseudo random number generator (PRNG), a pseudo random number function (PRF), etc. are generally used. However, even such a random number generator must use a seed value, which is an initial value having randomness. For example, in order to use a true random number generator, a random number of a true random number generator or a pseudo random number function is generally used as an initial value.

The seed value of the random number can be used in various combinations or by using an external value that is unpredictable within the system. First, the seed value in the true random number generator can be used as a seed using the random number value of the true random number generator or true random number function.

Here, the true random number generator uses a seed based on a measurement value for a physical phenomenon that is generated outside the system or is difficult to predict inside the system. For example, as a usable seed value calculation source, user-defined values can be combined with internal CPU temperature, time, mouse movement pattern, keyboard input timing, system disk electrical activity and instantaneous values of the system clock, etc. Therefore, it can be used as a random number value of a true random number function.

As such, in order to find a seed value that is not uniform and difficult to predict, a value based on physical characteristics outside the operating system is used, but there is a problem in that the cost increases in order to measure the corresponding value.

For example, when the temperature of the chipset is used for a true random number generator in the encryption module of an electronic watt-hour meter, there is a problem in that the cost increases as a sensor for measuring the temperature is additionally mounted.

In addition, the time value of the system may be used, but there is a problem in that the seed value becomes the same in the same group when the system time is reset due to a power outage and battery aging.

The present invention has been devised to improve the above problems, and an object of the present invention according to one aspect is to obtain a seed value for extracting a random number used for security and communication in a digital watt-hour meter of an AMI system using a power measurement sensor. An object is to provide an apparatus and method for generating a sheath for random numbers that are self-generated based on a power value and supply the same to a related module.

According to an aspect of the present invention, there is provided an apparatus for generating a seed for random numbers, comprising: a measuring unit for measuring power states of a load side and an incoming side in a digital watt-hour meter; an AD converter that converts the measurement data measured by the measurement unit into digital data; and a seed generator configured to determine a measurement point for extracting a source value from the measurement data converted through the AD converter to extract the source value, and to generate a seed value based on the extracted source value.

The present invention is characterized in that it further comprises an output unit for providing the seed value generated by the seed generating unit to the peripheral module.

In the present invention, the measuring unit is characterized in that it includes a voltage sensor for each phase and a current sensor for each phase.

In the present invention, the seed generating unit includes: a measurement time determination unit for determining a measurement time for extracting a source value; a digit determining unit that determines the number of digits of the seed value; a data extraction unit for extracting a source value from the measurement data according to the number of digits determined at the time of measurement; and a seed value determiner configured to combine or combine the source values extracted by the data extractor to determine a seed value.

In the present invention, the measurement time determining unit determines the measurement time by combining any one or more of a selected value among the number of pulses transmitted from the AD converter, a reception time of external data, and an operation time of an external factor and an internal functional element. .

The measurement time determination unit in the present invention is characterized in that the measurement time is selected by applying a value selected from the measurement data converted through the AD converter as a constant to the Fourier series to generate upper and lower limit values of the frequency pattern.

In the present invention, the data extraction unit extracts the source value based on the number of digits determined by the digit determination unit after mixing through a shuffling technique according to the resolution of the AD converter.

In the present invention, when the number of digits determined by the digit determination unit is greater than the resolution of the AD converter, the data extraction unit generates and extracts a uniform distribution based on the measurement data detected multiple times.

According to another aspect of the present invention, there is provided a method for generating a seed for random numbers, the method comprising: determining a measurement time point for extracting a source value from an output of an AD converter for converting, by a seed generating unit, measured data measured by a measuring unit of a digital watt-hour meter into digital data; determining the number of digits of a seed value to be generated by the seed generator; extracting, by the seed generator, a source value from the measurement data according to the number of digits determined at the time of measurement; and determining, by the seed generator, a seed value based on the extracted source value.

In the present invention, the step of determining the measurement time includes combining any one or more of the selected value among the number of pulses transmitted from the AD converter by the seed generator, the reception time of external data, and the operation time of external factors and internal functional elements to determine the measurement time. characterized by determining.

In the present invention, the step of determining the measurement time includes selecting the measurement time by generating the upper and lower limit values of the frequency pattern by applying the value selected from the measurement data converted through the AD converter by the seed generator as a constant to the Fourier series. do.

The step of extracting the source value in the present invention is characterized in that the seed generator extracts the source value based on the number of digits determined by mixing through a shuffling technique according to the resolution of the AD converter.

The step of extracting the source value in the present invention is characterized in that, when the number of digits determined by the seed generator is greater than the resolution of the AD converter, a uniform distribution is generated and extracted based on the measurement data detected a plurality of times.

The step of determining the seed value in the present invention is characterized in that the seed generator determines the seed value by combining or combining based on the extracted source value.

The present invention is characterized in that it further comprises the step of providing the seed value generated by the seed generator to the peripheral module.

An apparatus and method for generating a seed for random numbers according to an aspect of the present invention generate a seed value for extracting a random number used for security and communication in a digital watt-hour meter of an AMI system based on the power value using a power measurement sensor, and , by supplying it to the relevant module, additional devices and costs can be reduced, and the individual identification and security can be strengthened because it is difficult to specify the measurement time, making it probabilistically difficult to predict or guess the exact seed value from the outside.

1 is a block diagram illustrating an apparatus for generating a seed for random numbers according to an embodiment of the present invention.
2 is a block diagram illustrating a seed generator of an apparatus for generating a seed for random numbers according to an embodiment of the present invention.
3 is a flowchart illustrating a method for generating a seed for random numbers according to an embodiment of the present invention.

Hereinafter, an apparatus for generating a seed for random numbers and a method therefor according to the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of the user or operator. Therefore, definitions of these terms should be made based on the content throughout this specification.

1 is a block diagram illustrating an apparatus for generating a seed for random numbers according to an embodiment of the present invention, and FIG. 2 is a block diagram illustrating a seed generator of an apparatus for generating a seed for random numbers according to an embodiment of the present invention.

1 and 2 , the apparatus for generating a random number seed according to an embodiment of the present invention includes an output unit 40 including a measuring unit 10 , an AD converter 20 , and a seed generating unit 30 . may include

The measuring unit 10 may include a voltage sensor for each phase and a current sensor for each phase for measuring the power state of the load side and the incoming side in the digital watt hour meter. In addition, the measuring unit 10 may include a temperature sensor and a humidity sensor capable of measuring environmental factors in the digital watt-hour meter.

The AD converter 20 may convert the measurement data measured by the measurement unit 10 into digital data.

Here, the AD converter 20 is a module that converts analog data into digital data, and measurement precision varies according to resolution capability. The resolution of the AD converter 20 used in the digital watt-hour meter can express a large number at the level of 24 bits, which is a picowatt range in terms of watts, and a very wide range of numbers can be expressed.

In addition, since the AD converter 20 basically has randomness, the power consumption may also be a value that is randomly generated at a specific point in time.

The seed generator 30 may extract a source value by determining a measurement time for extracting a source value from the measurement data converted through the AD converter 20 , and may generate a seed value based on the extracted source value.

Here, the seed generator 30 may include a measurement time determiner 32 , a digit determiner 34 , a data extractor 36 , and a seed value determiner 38 as shown in FIG. 2 .

The measurement time determination unit 32 may determine a measurement time for extracting the source value.

Here, in order to increase randomness and make it unpredictable, the measurement time determination unit 32 selects any one of a value selected among the number of pulses transmitted from the AD converter 20, a time of reception of external data, and an operation time of an external factor and an internal functional element. By combining the above, the measurement time can be determined.

In addition, the measurement time determination unit 32 applies a value selected from the measurement data converted through the AD converter 20 as a constant (a, b) to a Fourier series equation as in Equation 1 to generate upper and lower limit values of the frequency pattern It is also possible to select the measurement point.

The number of digits determiner 34 may determine the number of digits of the seed value to be generated.

The data extraction unit 36 may extract a source value from the measurement data according to the number of digits determined at the time of measurement.

Here, the data extraction unit 36 may extract a source value based on the number of digits determined by the number of digits determination unit 34 by mixing through a shuffling technique according to the resolution of the AD converter 20 .

In addition, when the number of digits determined by the digit determination unit 34 is greater than the resolution of the AD converter 20, the data extraction unit 36 may generate and extract a uniform distribution based on the measurement data detected a plurality of times. have. In this case, it can be extracted based on the last digit with a large fluctuation range.

In addition, when the first measurement data value is 1111, the second characteristic data value is 2222, and a two-digit seed value is required, the source value may be extracted as 12.

The seed value determiner 34 may determine the seed value by combining or combining the source values extracted by the data extractor 36 .

For example, the seed value determiner 34 may determine the seed value by calculating the synthesized active power amount, the synthesized terrestrial reactive power, the synthesized advanced reactive power, and the synthesized apparent power for a set time.

The seed generator 34 may generate a seed value by variably extracting and combining or combining source values according to the type and measurement method of the digital watt-hour meter.

That is, in the case of a three-phase watt-hour meter, it can be generated by extracting each phase and calculating the source value extracted for each phase in a combinatorial formula, and combining the voltage detected by the high impedance voltage dividing circuit separated by each phase voltage You may.

The output unit 40 provides the seed value generated by the seed generator 30 to the encryption module 52, the communication module 54, and the system module 56, which are peripheral modules, and based on the seed value provided by each module. Allows you to generate random numbers.

As described above, according to the device for generating a random number seed according to an embodiment of the present invention, the seed value for extracting a random number used for security and communication in the digital watt-hour meter of the AMI system is based on the power value using the power measurement sensor By generating it by itself and supplying it to related modules, it is possible to reduce additional devices and costs, as well as to strengthen individual identification and security because it is difficult to specify the measurement time, making it probabilistically difficult to predict or guess the exact seed value from the outside. can

3 is a flowchart illustrating a method for generating a seed for random numbers according to an embodiment of the present invention.

As shown in FIG. 3 , in the method for generating a random number seed according to an embodiment of the present invention, first, the seed generating unit 30 converts the measured data measured by the measuring unit 10 of the digital watt-hour meter into digital data. The output of (20) is received (S10).

Here, the measurement data measured by the measurement unit 10 may include voltage and current measured by a phase-by-phase voltage sensor and phase-by-phase current sensor for measuring the power state of the load side and the incoming side in the digital watt-hour meter. It may also include temperature and humidity, which can measure environmental factors in a digital watt-hour meter.

The AD converter 20 is a module that converts analog data into digital data, and since the measurement precision varies depending on the resolution capability, if the resolution of the AD converter 20 used in the digital watt-hour meter is 24 bits, large numbers can be expressed. In terms of watts, this is a picowatt range, and a very wide range of numbers can be expressed.

In addition, since the AD converter 20 basically has randomness, the power consumption may also be a value that is randomly generated at a specific point in time.

In order to extract a source value from the measurement data input in step S10, the seed generator 30 determines a measurement time point at which the source value is extracted (S20).

Here, the measurement time is a value selected among the number of pulses transmitted from the AD converter 20 by the seed generator 30 in order to increase randomness so that it cannot be predicted, the time of receiving external data, and the operating time of external factors and internal functional elements It can be determined by combining any one or more.

In addition, as shown in Equation 2, a value selected from the measurement data converted through the AD converter 20 may be applied as constants (a, b) to the Fourier series equation to generate upper and lower limit values of the frequency pattern to select a measurement time point.

After determining the measurement time in step S20, the seed generator 30 determines the number of digits of a seed value to be generated (S30).

After determining the number of digits of the seed value in step S30, the seed generator 30 extracts a source value from the measurement data according to the number of digits determined at the measurement time (S40).

Here, the seed generator 30 may extract a source value based on the number of digits determined by mixing through a shuffling technique according to the resolution of the AD converter 20 .

Also, when the determined number of digits is greater than the resolution of the AD converter 20 , the seed generator 30 may generate and extract a uniform distribution based on the measurement data detected a plurality of times. In this case, it can be extracted based on the last digit with a large fluctuation range.

Meanwhile, the seed generator 30 may extract the source value as 12 when the first measurement data value is 1111, the second characteristic data value is 2222, and a two-digit seed value is required.

After extracting the source value in step S40, the seed generator determines a seed value based on the extracted source value (S50).

For example, the seed generator 30 may determine the seed value by calculating the synthesized active power amount, the synthesized terrestrial reactive power, the synthetic advanced reactive power, and the synthesized apparent power for a set time.

Also, the seed generator 30 may generate a seed value by variably extracting and combining or combining source values according to the type and measurement method of the digital watt-hour meter.

That is, in the case of a three-phase watt-hour meter, it can be generated by extracting each phase and calculating the source value extracted for each phase in a combinatorial formula, and combining the voltage detected by the high impedance voltage dividing circuit separated by each phase voltage You may.

After determining the seed value in step S50, the seed generation unit 30 provides the generated seed value to the encryption module 52, communication module 54, and system module 56, which are peripheral modules, to obtain the seed value provided by each module. Based on the random number to be generated (S60).

As described above, according to the method for generating a random number seed according to an embodiment of the present invention, the seed value for extracting a random number used for security and communication in the digital watt-hour meter of the AMI system is based on the power value using the power measurement sensor. By generating it by itself and supplying it to related modules, it is possible to reduce additional devices and costs, as well as to strengthen individual identification and security because it is difficult to specify the measurement time, making it probabilistically difficult to predict or guess the exact seed value from the outside. can

Implementations described herein may be implemented in, for example, a method or process, an apparatus, a software program, a data stream, or a signal. Although discussed only in the context of a single form of implementation (eg, discussed only as a method), implementations of the discussed features may also be implemented in other forms (eg, as an apparatus or program). The apparatus may be implemented in suitable hardware, software and firmware, and the like. A method may be implemented in an apparatus such as, for example, a processor, which generally refers to a computer, a microprocessor, a processing device, including an integrated circuit or programmable logic device, or the like. Processors also include communication devices such as computers, cell phones, portable/personal digital assistants (“PDA”) and other devices that facilitate communication of information between end-users.

Although the present invention has been described with reference to the embodiment shown in the drawings, this is merely an example, and those skilled in the art to which various modifications and equivalent other embodiments are possible. will understand

Therefore, the true technical protection scope of the present invention should be defined by the following claims.

10: measurement unit 20: AD converter
30: seed generation unit 32: measurement time determination unit
34: digit determining unit 36: data extraction unit
38: seed value determination unit 40: output unit
52: encryption module 54: communication module
56: system module

Claims (15)

a measuring unit for measuring the power state of the load side and the incoming side in the digital watt hour meter;
an AD converter for converting the measurement data measured by the measurement unit into digital data; and
A seed generator configured to determine a measurement time for extracting a source value from the measurement data converted through the AD converter to extract a source value, and to generate a seed value based on the extracted source value;
The seed generator,
a measurement time determination unit for determining the measurement time for extracting the source value;
a digit determining unit that determines the number of digits of the seed value;
a data extraction unit for extracting the source value from the measurement data according to the number of digits determined at the measurement time; and
a seed value determining unit configured to determine the seed value by combining or combining the source values extracted by the data extraction unit;
and the data extraction unit generates and extracts a uniform distribution based on the measurement data detected a plurality of times, when the number of digits determined by the number determination unit is greater than the resolution of the AD converter.
The apparatus of claim 1, further comprising an output unit that provides the seed value generated by the seed generator to a peripheral module.
The apparatus of claim 1, wherein the measuring unit includes a voltage sensor for each phase and a current sensor for each phase.
delete The method of claim 1, wherein the measurement time determination unit determines the measurement time by combining any one or more of a selected value among the number of pulses transmitted from the AD converter, a reception time of external data, and an operation time of an external factor and an internal functional element. A seed generating device for random numbers, characterized in that it determines.
The method according to claim 1, wherein the measurement time determining unit selects the measurement time by generating upper and lower limit values of the frequency pattern by applying a value selected from the measurement data converted through the AD converter as a constant to a Fourier series equation. A seed generator for random numbers.
The apparatus of claim 1, wherein the data extractor extracts the source value based on the number of digits determined by the digit determiner after mixing through a shuffling technique according to the resolution of the AD converter. .
delete determining, by the seed generator, a measurement point for extracting a source value from the output of an AD converter that converts the measurement data measured by the measurement unit of the digital watt-hour meter into digital data;
determining the number of digits of the seed value to be generated by the seed generator;
extracting, by the seed generator, the source value from the measurement data according to the number of digits determined at the measurement time; and
determining, by the seed generator, a seed value based on the extracted source value;
In the step of extracting the source value, when the number of digits determined by the seed generator is greater than the resolution of the AD converter, a uniform distribution is generated and extracted based on the measurement data detected a plurality of times. Way.
10. The method of claim 9, wherein the determining of the measurement time comprises any one or more of a value selected among the number of pulses transmitted from the AD converter by the seed generator, a time of receiving external data, an operating time of an external factor, and an internal functional element. A method for generating seeds for random numbers, characterized in that by combining them to determine the measurement time.
10. The method of claim 9, wherein the determining of the measurement time comprises applying a value selected from the measurement data converted through the AD converter by the seed generator as a constant to a Fourier series to generate upper and lower limit values of the frequency pattern. A method for generating seeds for random numbers, characterized in that the measurement time is selected.
10. The random number seed of claim 9, wherein the extracting the source value comprises extracting the source value based on the number of digits determined by mixing through a shuffling technique according to the resolution of the AD converter by the seed generator. How to create.
delete 10. The method of claim 9, wherein the determining of the seed value comprises determining the seed value by combining or combining based on the extracted source value by the seed generator.
10. The method of claim 9, further comprising the step of providing the seed value generated by the seed generator to a peripheral module.

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