CN114114892A - Method for generating credible time - Google Patents
Method for generating credible time Download PDFInfo
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- CN114114892A CN114114892A CN202111433557.0A CN202111433557A CN114114892A CN 114114892 A CN114114892 A CN 114114892A CN 202111433557 A CN202111433557 A CN 202111433557A CN 114114892 A CN114114892 A CN 114114892A
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- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS
- G04R20/04—Tuning or receiving; Circuits therefor
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- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS
- G04R20/06—Decoding time data; Circuits therefor
Abstract
The invention discloses a method for generating trusted time, which belongs to the technical field of time calibration and comprises the following steps: acquiring standard time and local time; acquiring a time difference between local time and standard time and first frequency accuracy according to the local time and the standard time; acquiring a local clock signal adjustment quantity according to the first frequency accuracy; and adjusting the local time according to the time difference, and adjusting the local clock signal according to the local clock signal adjustment quantity to obtain the trusted time. The invention ensures the accuracy, reliability and safety of local time. The invention monitors the credible time after generating the credible time, thereby further ensuring the accuracy, reliability and safety of the time.
Description
Technical Field
The invention belongs to the technical field of time calibration, and particularly relates to a method for generating trusted time.
Background
With the rapid development of information technology, electronic technology, and internet technology, the need for accurate, secure, and authoritative time will become more and more urgent. Electronic evidence is becoming more and more important due to emerging judicial judgment modes such as network arbitration and internet court; in addition, as the internet activities are more and more accepted by the public, activities such as online office, online signing contract, online court and e-government are gradually popularized depending on the internet, a large amount of electronic data is generated in the internet activities, and the electronic data is usually time-stamped in order to ensure the authenticity and the effectiveness of the electronic data. However, in the prior art, the time of the operating system is usually directly used as the time stamp, so that the time attribute of the electronic data is inaccurate, and the authenticity and validity of the electronic data are not guaranteed. Therefore, in order to secure the electronic data from being tampered with and to secure the authenticity of the electronic data, the present application proposes a method of generating a trusted time.
Disclosure of Invention
In order to overcome the defects in the prior art, the method for generating the trusted time provided by the invention solves the problems in the prior art.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that: a method of generating a trusted time, comprising:
acquiring standard time and local time;
acquiring a time difference between local time and standard time and first frequency accuracy according to the local time and the standard time;
acquiring a local clock signal adjustment quantity according to the first frequency accuracy;
and adjusting the local time according to the time difference, and adjusting the local clock signal according to the local clock signal adjustment quantity to obtain the trusted time.
Further, the obtaining a time difference between the local time and the standard time and a first frequency accuracy according to the local time and the standard time includes:
setting a measurement time interval as t seconds;
taking the same moment as a starting point, and acquiring a first local time and a first standard time after t seconds;
taking the moment after t + n seconds as a starting point, and acquiring second local time and second standard time after 2t + n seconds;
acquiring a time difference between the local time and the standard time and a first frequency accuracy according to the first local time, the first standard time, the second local time and the second standard time;
the first standard time and the second standard time both represent standard time collected from a national time service center at a specified time.
Further, the obtaining a time difference between the local time and the standard time and a first frequency accuracy according to the first local time, the first standard time, the second local time and the second standard time includes:
obtaining a first time difference delta t according to the first local time and the first standard time1；
Obtaining a second time difference delta t according to the second local time and the second standard time2；
According to the first time difference Deltat1And a second time difference Δ t2A first frequency accuracy is obtained.
Further, the first frequency accuracy, the first time difference Δ t1And a second time difference Δ t2The relationship between them is:
where a represents a first frequency accuracy and b represents a first frequency drift rate.
Further, the obtaining a local clock signal adjustment according to the first frequency accuracy includes:
acquiring a frequency deviation delta f according to the first frequency accuracy;
and setting the maximum adjustment quantity delta F of the local clock signal, and acquiring the adjustment quantity N of the local clock signal according to the maximum adjustment quantity delta F and the frequency deviation delta F.
Further, the frequency deviation Δ f is:
Δf＝a×f
the local clock signal adjustment quantity N is:
N＝Δf/(ΔF/232)
wherein f represents a standard frequency.
Further, still include:
acquiring measurement standard time and credible time;
acquiring a second frequency accuracy and a second frequency drift rate according to the measurement standard time and the credible time;
monitoring the trusted time according to the second frequency accuracy and the second frequency drift rate;
wherein the metering standard time represents the time meeting the metering standard acquired from the national metering institute at the specified time.
Further, the obtaining a second frequency accuracy and a second frequency drift rate according to the metric time and the trusted time includes:
setting the measurement time interval as t's;
taking the same moment as a starting point, and acquiring a first trusted time and a first metering standard time after t's;
taking the time after t '+ n seconds as a starting point, and acquiring a second trusted time and a second metering standard time after 2t' + n seconds;
and acquiring a second frequency accuracy and a second frequency drift rate according to the first credible time, the first metering standard time, the second credible time and the second metering standard time.
Further, the obtaining a second frequency accuracy and a second frequency drift rate according to the first trusted time, the first measurement standard time, the second trusted time, and the second measurement standard time includes:
obtaining a third time difference delta t according to the first credible time and the first metering standard time3；
Obtaining a fourth time difference delta t according to the second credible time and the second metering standard time4；
According to the third time difference Deltat3And a fourth time difference Δ t4And acquiring a second frequency accuracy and a second frequency drift rate.
Further, the third time difference Δ t3The relationship between the second frequency accuracy and the second frequency drift rate is:
the fourth time difference Δ t4The relationship between the second frequency accuracy and the second frequency drift rate is:
where a 'represents a second frequency accuracy and b' represents a second frequency drift rate.
The invention has the beneficial effects that:
(1) the invention provides a method for generating trusted time, which is characterized in that the local time is compared with the standard time to obtain the time difference, and the adjustment quantity of a local clock signal is obtained according to the time difference, so that the local time can be adjusted according to the time difference, the local clock signal is adjusted according to the adjustment quantity of the local clock signal to obtain the trusted time, and the accuracy, the reliability and the safety of the local time are ensured.
(2) The invention monitors the credible time after generating the credible time, thereby further ensuring the accuracy, reliability and safety of the time.
Drawings
Fig. 1 is a flowchart of a method for generating a trusted time according to an embodiment of the present invention.
Fig. 2 is a block diagram of a system for generating a trusted time according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an apparatus for generating a trusted time according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a device for generating a trusted time according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1
As shown in fig. 1, a method of generating a trusted time, comprising:
s11, acquiring standard time and local time;
s12, acquiring the time difference between the local time and the standard time and the first frequency accuracy according to the local time and the standard time;
s13, acquiring a local clock signal adjustment quantity according to the first frequency accuracy;
and S14, adjusting the local time according to the time difference, and adjusting the local clock signal according to the local clock signal adjustment quantity to obtain the trusted time.
The obtaining of the standard time and the local time includes: collecting local time generated by a time signal generating device; and collecting standard time generated by a national time service center.
In one possible embodiment, the obtaining the time difference between the local time and the standard time and the first frequency accuracy according to the local time and the standard time includes:
the measurement time interval is set to t seconds.
And taking the same moment as a starting point, and acquiring a first local time and a first standard time after t seconds.
And taking the time after t + n seconds as a starting point, and acquiring a second local time and a second standard time after 2t + n seconds.
And acquiring the time difference between the local time and the standard time and the first frequency accuracy according to the first local time, the first standard time, the second local time and the second standard time.
The first standard time and the second standard time both represent standard time collected from a national time service center at a specified time.
In a possible embodiment, the obtaining a time difference between the local time and the standard time and a first frequency accuracy according to the first local time, the first standard time, the second local time and the second standard time includes:
obtaining a first time difference delta t according to the first local time and the first standard time1。
Obtaining a second time difference delta t according to the second local time and the second standard time2。
According to the first time difference Deltat1And a second time difference Δ t2A first frequency accuracy is obtained.
Optionally, the first time difference Δ t is obtained according to the first local time and the first standard time1The method comprises the following steps: subtracting the first standard time from the first local time to obtain a first time difference delta t1。
Obtaining a second time difference delta t according to the second local time and the second standard time2The method comprises the following steps: subtracting the second standard time from the second local time to obtain a second time difference deltat2。
In a possible embodiment, the first frequency accuracy, the first time difference Δ t1And a second time difference Δ t2The relationship between them is:
where a represents a first frequency accuracy and b represents a first frequency drift rate.
Optionally, t may be set to 960, n is any positive integer, for example, n may be 50, 100, or 200.
In one possible embodiment, the obtaining the local clock signal adjustment amount according to the first frequency accuracy includes:
according to the first frequency accuracy, a frequency deviation Δ f is obtained.
And setting the maximum adjustment quantity delta F of the local clock signal, and acquiring the adjustment quantity N of the local clock signal according to the maximum adjustment quantity delta F and the frequency deviation delta F.
In one possible embodiment, the frequency deviation Δ f is:
Δf＝a×f
the local clock signal adjustment quantity N is:
N＝Δf/(ΔF/232)
wherein f represents a standard frequency.
Alternatively, the standard frequency F may be set to 10MHz, and the maximum adjustment amount Δ F may be set to 100 Hz.
In one possible embodiment, the method further comprises:
acquiring measurement standard time and credible time;
acquiring a second frequency accuracy and a second frequency drift rate according to the measurement standard time and the credible time;
monitoring the trusted time according to the second frequency accuracy and the second frequency drift rate;
wherein the metering standard time represents the time meeting the metering standard acquired from the national metering institute at the specified time.
In one possible embodiment, the obtaining of the second frequency accuracy and the second frequency drift rate according to the metric time and the trusted time includes:
the measurement time interval is set to t' seconds, which may be set to 960.
And taking the same moment as a starting point, and acquiring a first credible time and a first metering standard time after t's.
And taking the time after t '+ n seconds as a starting point, and acquiring a second trusted time and a second metering standard time after 2t' + n seconds.
And acquiring a second frequency accuracy and a second frequency drift rate according to the first credible time, the first metering standard time, the second credible time and the second metering standard time.
In a possible implementation, the obtaining a second frequency accuracy and a second frequency drift rate according to the first trusted time, the first metric time, the second trusted time, and the second metric time includes:
obtaining a third time difference delta t according to the first credible time and the first metering standard time3。
Obtaining a fourth time difference delta t according to the second credible time and the second metering standard time4。
According to the third time difference Deltat3And a fourth time difference Δ t4And acquiring a second frequency accuracy and a second frequency drift rate.
Optionally, the third time difference Δ t is obtained according to the first trusted time and the first metering standard time3The method comprises the following steps: subtracting the first metering standard time from the first credible time to obtain a third time difference delta t3。
Obtaining a fourth time difference delta t according to the second credible time and the second metering standard time4The method comprises the following steps: subtracting the second measurement standard time from the second credible time to obtain a fourth time difference delta t4。
In a possible embodiment, the third time difference Δ t3The relationship between the second frequency accuracy and the second frequency drift rate is:
the fourth time difference Δ t4The relationship between the second frequency accuracy and the second frequency drift rate is:
where a 'represents a second frequency accuracy and b' represents a second frequency drift rate.
Alternatively, an accuracy threshold range and a drift rate threshold range may be set, and when the second frequency accuracy a 'exceeds the set accuracy threshold range or the second frequency drift rate b' exceeds the drift rate threshold range, alarm information and log information may be generated and visualized.
In a possible implementation mode, data generated in the process of generating the trusted time and data generated in the process of monitoring the trusted time can be stored to form an unalterable log, so that the reliability and safety of time are ensured while the reading is facilitated. The stored data may include a first time difference Δ t1A second time difference Deltat2The third time difference Deltat3Fourth time difference Δ t4The first frequency accuracy a, the first frequency drift rate b, the frequency deviation delta f, the local clock signal adjustment amount N, the second frequency accuracy a 'and the second frequency drift rate b'.
The invention provides a method for generating trusted time, which is characterized in that the local time is compared with the standard time to obtain the time difference, and the adjustment quantity of a local clock signal is obtained according to the time difference, so that the local time can be adjusted according to the time difference, the local clock signal is adjusted according to the adjustment quantity of the local clock signal to obtain the trusted time, and the accuracy, the reliability and the safety of the local time are ensured.
The invention monitors the credible time after generating the credible time, thereby further ensuring the accuracy, reliability and safety of the time.
Example 2
As shown in fig. 2, the embodiment provides a system for generating a trusted time, which includes a database server, a computer, a time signal generating device, a standard time tracing device, a first GNSS satellite, and a second DNSS satellite.
The computer is respectively in communication connection with the database server, the time signal generating device, the standard time tracing device and the metering standard time tracing device, the time signal generating device is respectively in electrical connection with the standard time tracing device, the metering standard time tracing device and the database server, the standard time tracing device is in communication connection with the first GNSS satellite, and the metering standard time tracing device is in communication connection with the second GNSS satellite.
In this embodiment, the time signal generating device is configured to generate local time, and transmit the local time to the standard time tracing device and the metering standard time tracing device, respectively.
The first GNSS satellite is connected to the national time service center and used for collecting standard time of the national time service center and transmitting the standard time to the standard time tracing equipment.
The second GNSS satellite is connected to a national measurement institute and is used for collecting measurement standard time (time meeting the measurement standard) and transmitting the measurement standard time to the measurement standard time tracing equipment.
The standard time tracing device is used for receiving the local time and the standard time, acquiring the time difference between the local time and the standard time, and transmitting the time difference between the local time and the standard time to the computer.
The metering standard time tracing device is used for receiving the local time and the metering standard time, acquiring the time difference between the local time and the metering standard time, and transmitting the time difference between the local time and the metering time to the computer.
The computer is used for receiving the time difference sent by the standard time tracing device and the time difference sent by the metering standard time tracing device, acquiring the trusted time and the local clock signal adjustment quantity according to the time difference sent by the standard time tracing device, transmitting the time difference sent by the standard time tracing device and the local clock signal adjustment quantity to the time signal generating device, and monitoring the trusted time according to the time difference sent by the metering standard time tracing device.
The database server is used for storing all data of the computer and the time signal generating equipment and forming an unchangeable log so as to ensure the authenticity of the data.
The system for generating the trusted time can generate the trusted time and monitor the trusted time, so that the validity and the authenticity of the time are guaranteed.
Example 3
As shown in fig. 3, the present embodiment provides an apparatus for generating a trusted time, which includes a first obtaining module 31, a second obtaining module 32, a third obtaining module 33, and an adjusting module 34.
The first obtaining module 31 is configured to obtain a standard time and a local time.
The second obtaining module 32 is configured to obtain a time difference between the local time and the standard time and a first frequency accuracy according to the local time and the standard time.
The third obtaining module 33 is configured to obtain the local clock signal adjustment amount according to the first frequency accuracy.
The adjusting module 34 is configured to adjust the local time according to the time difference, and adjust the local clock signal according to the local clock signal adjustment amount to obtain the trusted time.
In this embodiment, the first obtaining module 31 is specifically configured to collect local time generated by the time signal generating device; and collecting standard time generated by a national time service center.
In this embodiment, the second obtaining module 32 is specifically configured to set the measurement time interval to t seconds; taking the same moment as a starting point, and acquiring a first local time and a first standard time after t seconds; taking the time after t + n seconds as a starting point, and acquiring second local time and second standard time after 2t + n seconds; acquiring a time difference between the local time and the standard time and a first frequency accuracy according to the first local time, the first standard time, the second local time and the second standard time; the first standard time and the second standard time both represent standard time collected from a national time service center at a specified time.
Optionally, obtaining the time difference between the local time and the standard time and the first frequency accuracy according to the first local time, the first standard time, the second local time, and the second standard time, includes: obtaining a first time difference delta t according to the first local time and the first standard time1(ii) a According to the second local time and the secondTwo standard times, obtaining a second time difference delta t2(ii) a According to the first time difference Deltat1And a second time difference Δ t2A first frequency accuracy is obtained.
Optionally, the first frequency accuracy, the first time difference Δ t1And a second time difference Δ t2The relationship between them is:
where a represents a first frequency accuracy and b represents a first frequency drift rate.
In this embodiment, the third obtaining module 33 is specifically configured to obtain the frequency deviation Δ f according to the first frequency accuracy; and setting the maximum adjustment quantity delta F of the local clock signal, and acquiring the adjustment quantity N of the local clock signal according to the maximum adjustment quantity delta F and the frequency deviation delta F.
The frequency deviation Δ f is:
Δf＝a×f
the local clock signal adjustment N is:
N＝Δf/(ΔF/232)
wherein f represents a standard frequency.
In this embodiment, an apparatus for generating a trusted time further includes a monitoring module, where the monitoring module is configured to obtain a metering standard time and the trusted time; acquiring a second frequency accuracy and a second frequency drift rate according to the measurement standard time and the credible time; monitoring the trusted time according to a second frequency accuracy and a second frequency drift rate; wherein the metering standard time represents the time meeting the metering standard acquired from the national metering institute at the specified moment.
Optionally, obtaining a second frequency accuracy and a second frequency drift rate according to the measurement standard time and the trusted time, including: setting the measurement time interval as t's; taking the same moment as a starting point, and acquiring a first trusted time and a first metering standard time after t's; taking the time after t '+ n seconds as a starting point, and acquiring a second trusted time and a second metering standard time after 2t' + n seconds; and acquiring a second frequency accuracy and a second frequency drift rate according to the first credible time, the first metering standard time, the second credible time and the second metering standard time.
Optionally, obtaining a second frequency accuracy and a second frequency drift rate according to the first trusted time, the first metering standard time, the second trusted time, and the second metering standard time, includes: obtaining a third time difference delta t according to the first credible time and the first metering standard time3(ii) a Obtaining a fourth time difference delta t according to the second credible time and the second metering standard time4(ii) a According to the third time difference Deltat3And a fourth time difference Δ t4A second frequency accuracy and a second frequency drift rate are obtained.
Optionally, the third time difference Δ t3The relationship between the second frequency accuracy and the second frequency drift rate is:
the fourth time difference Δ t4The relationship between the second frequency accuracy and the second frequency drift rate is:
where a 'represents a second frequency accuracy and b' represents a second frequency drift rate.
The apparatus for generating trusted time provided in the embodiment shown in fig. 3 may execute the technical solution provided in the method embodiment described in embodiment 1, and the implementation principle and the beneficial effect thereof are similar, which are not described again here.
Example 4
As shown in fig. 4, an embodiment of the present application provides a device for generating a trusted time, and the device 40 for generating a trusted time may include a memory 41 and a processor 42. The memory 41 and the processor 42 are illustratively interconnected via a bus 43.
The memory 41 stores computer-executable instructions;
the processor 42 executes the memory-stored computer-executable instructions causing the processor to perform the method of generating a trusted time shown in embodiment 1.
The device for generating the trusted time shown in the embodiment of fig. 4 may execute the technical solution shown in the method embodiment described in embodiment 1, and the implementation principle and the beneficial effect thereof are similar and will not be described again here.
Example 5
Embodiments of the present application provide a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, the method for generating a trusted time as described in embodiment 1 is implemented.
Example 6
Embodiments of the present application may also provide a computer program product, which includes a computer program, and when the computer program is executed by a processor, the method for generating the trusted time as shown in embodiment 1 is implemented.
Claims (10)
1. A method of generating a trusted time, comprising:
acquiring standard time and local time;
acquiring a time difference between local time and standard time and first frequency accuracy according to the local time and the standard time;
acquiring a local clock signal adjustment quantity according to the first frequency accuracy;
and adjusting the local time according to the time difference, and adjusting the local clock signal according to the local clock signal adjustment quantity to obtain the trusted time.
2. The method of generating a trusted time according to claim 1, wherein said obtaining a time difference between a local time and a standard time and a first frequency accuracy from the local time and the standard time comprises:
setting a measurement time interval as t seconds;
taking the same moment as a starting point, and acquiring a first local time and a first standard time after t seconds;
taking the moment after t + n seconds as a starting point, and acquiring second local time and second standard time after 2t + n seconds;
acquiring a time difference between the local time and the standard time and a first frequency accuracy according to the first local time, the first standard time, the second local time and the second standard time;
the first standard time and the second standard time both represent standard time collected from a national time service center at a specified time.
3. The method of generating a trusted time according to claim 2, wherein said obtaining a time difference between a local time and a standard time and a first frequency accuracy from a first local time, a first standard time, a second local time and a second standard time comprises:
obtaining a first time difference delta t according to the first local time and the first standard time1；
Obtaining a second time difference delta t according to the second local time and the second standard time2；
According to the first time difference Deltat1And a second time difference Δ t2A first frequency accuracy is obtained.
4. Method for generating a trusted time according to claim 3, characterized in that said first frequency accuracy, first time difference Δ t1And a second time difference Δ t2The relationship between them is:
where a represents a first frequency accuracy and b represents a first frequency drift rate.
5. The method of generating trusted time as claimed in claim 4, wherein said obtaining a local clock signal adjustment based on a first frequency accuracy comprises:
acquiring a frequency deviation delta f according to the first frequency accuracy;
and setting the maximum adjustment quantity delta F of the local clock signal, and acquiring the adjustment quantity N of the local clock signal according to the maximum adjustment quantity delta F and the frequency deviation delta F.
6. Method for generating a trusted time according to claim 5, characterized in that said frequency deviation Δ f is:
Δf＝a×f
the local clock signal adjustment quantity N is:
N＝Δf/(ΔF/232)
wherein f represents a standard frequency.
7. The method of generating a trusted time according to any one of claims 1-6, further comprising:
acquiring measurement standard time and credible time;
acquiring a second frequency accuracy and a second frequency drift rate according to the measurement standard time and the credible time;
monitoring the trusted time according to the second frequency accuracy and the second frequency drift rate;
wherein the metering standard time represents the time meeting the metering standard acquired from the national metering institute at the specified moment.
8. The method of generating trusted time as claimed in claim 7, wherein said obtaining a second frequency accuracy and a second frequency drift rate from said metric time and said trusted time comprises:
setting the measurement time interval as t's;
taking the same moment as a starting point, and acquiring a first trusted time and a first metering standard time after t's;
taking the time after t '+ n seconds as a starting point, and acquiring a second trusted time and a second metering standard time after 2t' + n seconds;
and acquiring a second frequency accuracy and a second frequency drift rate according to the first credible time, the first metering standard time, the second credible time and the second metering standard time.
9. The method of generating a trusted time as claimed in claim 8, wherein said deriving a second frequency accuracy and a second frequency drift rate from said first trusted time, said first metrological standard time, said second trusted time and said second metrological standard time comprises:
obtaining a third time difference delta t according to the first credible time and the first metering standard time3；
Obtaining a fourth time difference delta t according to the second credible time and the second metering standard time4；
According to the third time difference Deltat3And a fourth time difference Δ t4A second frequency accuracy and a second frequency drift rate are obtained.
10. Method for generating a trusted time according to claim 9, characterised in that said third time difference Δ t3The relationship between the second frequency accuracy and the second frequency drift rate is:
the fourth time difference Δ t4The relationship between the second frequency accuracy and the second frequency drift rate is:
where a 'represents a second frequency accuracy and b' represents a second frequency drift rate.
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| CN116155629A (en) * | 2023-04-20 | 2023-05-23 | 南京鹤梦信息技术有限公司 | Block chain time authentication method, device, system and computer readable medium |
| CN116155629B (en) * | 2023-04-20 | 2023-07-18 | 南京鹤梦信息技术有限公司 | Block chain time authentication method, device, system and computer readable medium |
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