CN112615690B - Method, device and equipment for preventing emergency broadcast data from being lost - Google Patents
Method, device and equipment for preventing emergency broadcast data from being lost Download PDFInfo
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- CN112615690B CN112615690B CN202011502855.6A CN202011502855A CN112615690B CN 112615690 B CN112615690 B CN 112615690B CN 202011502855 A CN202011502855 A CN 202011502855A CN 112615690 B CN112615690 B CN 112615690B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
- H04H20/59—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for emergency or urgency
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/09—Arrangements for device control with a direct linkage to broadcast information or to broadcast space-time; Arrangements for control of broadcast-related services
- H04H60/14—Arrangements for conditional access to broadcast information or to broadcast-related services
- H04H60/23—Arrangements for conditional access to broadcast information or to broadcast-related services using cryptography, e.g. encryption, authentication, key distribution
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/27—Arrangements for recording or accumulating broadcast information or broadcast-related information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/29—Arrangements for monitoring broadcast services or broadcast-related services
- H04H60/31—Arrangements for monitoring the use made of the broadcast services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/12—Applying verification of the received information
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Abstract
The invention discloses a method, a device and equipment for preventing emergency broadcast data from being lost, which are used for detecting and preventing data from being lost and ensuring the quality in the data storage process. The method comprises the following steps: if the emergency broadcast messages need to be backed up, determining the number of the emergency broadcast messages which have been sent according to the maximum date count value and the initial date count value in each message instruction signature file in the service database; after the message instruction file is detected currently, the date count value is determined based on a fixed step length and the date count value in the message instruction signature file corresponding to the last detected message instruction file, and the date count value is used for representing the number of emergency broadcast messages; and if the sent quantity is inconsistent with the quantity of the emergency broadcast messages in the service database, searching the lost emergency broadcast messages in the service database according to the lost date count value, and recovering the lost emergency broadcast messages to the service database.
Description
Technical Field
The invention relates to the technical field of Internet Technology (IT), in particular to a method, a device and equipment for preventing emergency broadcast data from being lost.
Background
At present, the safety protection mechanism of the emergency broadcast message and the command is realized by adopting digital signature and digital certificate technology. The emergency broadcast messages transmitted among the platforms of the emergency broadcast and the emergency broadcast transmission coverage instructions transmitted in the broadcast television transmission coverage network realize authenticity, legality and integrity protection by adopting a digital signature technology based on an asymmetric cryptographic algorithm.
However, the currently adopted digital signature and digital certificate technology can only guarantee the security requirement of the emergency broadcast message in the transmission process, cannot guarantee the security of the data in the storage process, and has no measures for preventing data loss, for example, missed broadcast due to packet loss in the message transmission process, or data loss generated in the storage process after the message is broadcast, and also has no means for detecting whether the data is lost, so that the data quality of the emergency broadcast message is unreliable, and further the authenticity of subsequent data analysis and the reliability of future big data analysis are influenced.
Disclosure of Invention
The invention provides a method, a device and equipment for preventing emergency broadcast data from being lost, which are used for detecting and preventing the emergency broadcast data from being lost and ensuring the quality in the data storage process.
In a first aspect, a method for preventing emergency broadcast data from being lost provided in an embodiment of the present invention includes:
if the emergency broadcast messages need to be backed up, determining the number of the emergency broadcast messages which have been sent according to the maximum date count value and the initial date count value in each message instruction signature file in the service database; the date count value is determined based on a fixed step length and the date count value in the message instruction signature file corresponding to the last detected message instruction file after the message instruction file is detected currently, the date count value is used for representing the number of emergency broadcast messages, and the message instruction file and the message instruction signature file are located in the emergency broadcast messages needing to be sent;
and if the sent quantity is inconsistent with the quantity of the emergency broadcast messages in the service database, searching the lost emergency broadcast messages in the service database according to the lost date count value, and recovering the lost emergency broadcast messages to the service database.
The embodiment of the invention uses the signature time data item in the emergency broadcast message instruction signature file format as a counter, realizes detection and prevents the data loss of the emergency broadcast message under the condition of ensuring no change and no addition of a new data structure, solves the problem of data omission, and ensures the reliability of data storage.
As an alternative embodiment, the date count value is determined by:
if the message instruction file is detected currently, determining a date count value in a message instruction signature file corresponding to the last detected message instruction file;
and accumulating the determined date count value by a fixed step length to obtain the date count value in the message instruction signature file corresponding to the currently detected message instruction file.
As an optional implementation manner, determining that the message instruction file is detected by the following method includes:
and if the generation time of the data packet in the message instruction file is determined to be the latest time according to the generation time of the data packet in the message instruction file, determining that the message instruction file is detected currently.
As an optional implementation manner, determining the number of emergency broadcast messages that have been sent according to the maximum date count value and the initial date count value in each message instruction signature file in the service database includes:
determining a difference between the maximum date count value and the initial date count value as the number of emergency broadcast messages that have been sent.
As an alternative embodiment, the lost date count value is determined by:
and determining the lost date count value according to the discontinuous date count value in each message instruction signature file in the service database.
As an alternative embodiment, searching for a missing emergency broadcast message according to a missing date count value includes:
if the lost date count value is not greater than the maximum date count value of the emergency broadcast message which is backed up, searching the lost emergency broadcast message from the backup database according to the lost date count value; or
And if the lost date count value is larger than the maximum date count value of the emergency broadcast message which is backed up, searching for the lost emergency broadcast message according to the transmission path of the emergency broadcast message by taking the latest backup time as the search starting time.
In a second aspect, an apparatus for preventing emergency broadcast data from being lost according to an embodiment of the present invention includes:
the quantity determining unit is used for determining the quantity of the emergency broadcast messages sent according to the maximum date count value and the initial date count value in each message instruction signature file in the service database if the emergency broadcast messages need to be backed up; the data count value is determined based on a fixed step length and a date count value in a message instruction signature file corresponding to a last detected message instruction file after a message instruction file is detected currently, the date count value is used for representing the number of emergency broadcast messages, and the message instruction file and the message instruction signature file are located in emergency broadcast messages needing to be sent;
and the searching and losing unit is used for searching the lost emergency broadcast message according to the lost date counting value and restoring the lost emergency broadcast message to the service database if the sent quantity is inconsistent with the quantity of the emergency broadcast messages in the service database.
As an optional implementation manner, the quantity determining unit is specifically configured to determine the date count value by:
if the message instruction file is detected currently, determining a date count value in a message instruction signature file corresponding to the last detected message instruction file;
and accumulating the determined date count value by a fixed step length to obtain the date count value in the message instruction signature file corresponding to the currently detected message instruction file.
As an optional implementation manner, the quantity determining unit is specifically configured to determine that a message instruction file is detected by:
and if the generation time of the data packet in the message instruction file is determined to be the latest time according to the generation time of the data packet in the message instruction file, determining that the message instruction file is detected currently.
As an optional implementation manner, the quantity determining unit is specifically configured to:
determining a difference between the maximum date count value and the initial date count value as the number of emergency broadcast messages that have been sent.
As an optional implementation manner, the finding loss unit is specifically configured to determine the lost date count value by:
and determining the lost date count value according to the discontinuous date count value in each message instruction signature file in the service database.
As an optional implementation manner, the finding lost unit is specifically configured to:
if the lost date count value is not greater than the maximum date count value of the emergency broadcast message which is backed up, searching the lost emergency broadcast message from the backup database according to the lost date count value; or
And if the lost date count value is larger than the maximum date count value of the emergency broadcast message which is backed up, searching for the lost emergency broadcast message according to the transmission path of the emergency broadcast message by taking the latest backup time as the search starting time.
In a third aspect, an embodiment of the present invention further provides an apparatus for preventing emergency broadcast data from being lost, where the apparatus includes a processor and a memory, where the memory is configured to store a program executable by the processor, and the processor is configured to read the program in the memory and perform the following steps:
if the emergency broadcast messages need to be backed up, determining the quantity of the emergency broadcast messages which are sent according to the maximum date count value and the initial date count value in each message instruction signature file in a service database; the data count value is determined based on a fixed step length and a date count value in a message instruction signature file corresponding to a last detected message instruction file after a message instruction file is detected currently, the date count value is used for representing the number of emergency broadcast messages, and the message instruction file and the message instruction signature file are located in emergency broadcast messages needing to be sent;
if the number of the emergency broadcast messages is inconsistent with the number of the emergency broadcast messages in the service database, searching the lost emergency broadcast messages in the service database according to the lost date count value, and recovering the lost emergency broadcast messages to the service database.
As an alternative embodiment, the processor is configured to determine the date count value by:
if the message instruction file is detected currently, determining a date count value in a message instruction signature file corresponding to the last detected message instruction file;
and accumulating the determined date count value by a fixed step length to obtain the date count value in the message instruction signature file corresponding to the currently detected message instruction file.
As an alternative embodiment, the processor is configured to determine that a message instruction file is detected by:
and if the generation time of the data packet in the message instruction file is determined to be the latest time according to the generation time of the data packet in the message instruction file, determining that the message instruction file is detected currently.
As an alternative embodiment, the treatment appliance is configured to:
determining a difference between the maximum date count value and the initial date count value as the number of emergency broadcast messages that have been sent.
As an alternative embodiment, the processor is configured to determine the missing date count value by:
and determining the lost date count value according to the discontinuous date count value in each message instruction signature file in the service database.
As an alternative embodiment, the treatment appliance is configured to:
if the lost date count value is not greater than the maximum date count value of the emergency broadcast message which is backed up, searching the lost emergency broadcast message from the backup database according to the lost date count value; or
And if the lost date count value is larger than the maximum date count value of the emergency broadcast message which is backed up, searching for the lost emergency broadcast message according to the transmission path of the emergency broadcast message by taking the latest backup time as the search starting time.
In a fourth aspect, an embodiment of the present invention further provides a computer storage medium, on which a computer program is stored, where the computer program is used to implement the steps of the method in the first aspect when the computer program is executed by a processor.
These and other aspects of the present application will be more readily apparent from the following description of the embodiments.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic diagram of an emergency broadcasting system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an emergency broadcast system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an emergency broadcast information file according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an emergency broadcast message file structure according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an emergency broadcast message instruction file according to an embodiment of the present invention;
fig. 6 is a schematic diagram illustrating a syntax structure of an emergency broadcast message according to an embodiment of the present invention;
fig. 7 is a diagram illustrating a syntax format of signature data according to an embodiment of the present invention;
fig. 8 is a schematic view of an interaction process in which an upper emergency broadcast platform sends an emergency broadcast message to a lower emergency broadcast platform according to an embodiment of the present invention;
fig. 9 is a schematic diagram of an interaction process of an emergency broadcast platform sending an emergency broadcast message to a transport overlay network according to an embodiment of the present invention;
fig. 10 is a schematic diagram of an interaction process of transmitting an emergency broadcast message to a receiving terminal by an overlay network according to an embodiment of the present invention;
fig. 11 is a flowchart of a method for preventing emergency broadcast data from being lost according to an embodiment of the present invention;
fig. 12 is a flowchart of a specific implementation method for preventing emergency broadcast data loss according to an embodiment of the present invention;
fig. 13 is a schematic diagram of an apparatus for preventing emergency broadcast data loss according to an embodiment of the present invention;
fig. 14 is a schematic diagram of an apparatus for preventing emergency broadcast data loss according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The term "and/or" in the embodiments of the present invention describes an association relationship of associated objects, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
The application scenario described in the embodiment of the present invention is for more clearly illustrating the technical solution of the embodiment of the present invention, and does not form a limitation on the technical solution provided in the embodiment of the present invention, and it can be known by a person skilled in the art that with the occurrence of a new application scenario, the technical solution provided in the embodiment of the present invention is also applicable to similar technical problems. In the description of the present invention, the term "plurality" means two or more unless otherwise specified.
Example 1
In order to ensure the safety of the transmission of emergency broadcast messages and transmission covering instructions between all levels of systems of the national emergency broadcast system, ensure that all levels of systems of the emergency broadcast only receive and process legal emergency broadcast messages and instructions, and prevent illegal attacks from interfering with normal social order, corresponding safety measures are required to ensure the authenticity, legality and integrity of the emergency broadcast messages and instructions.
The safety protection mechanism of the emergency broadcast message and the command is realized by adopting digital signature and digital certificate technology. The emergency broadcast messages transmitted among the platforms of the emergency broadcast and the emergency broadcast transmission coverage instructions transmitted in the broadcast television transmission coverage network realize authenticity, legality and integrity protection by adopting a digital signature technology based on an asymmetric cryptographic algorithm. A sending end of the emergency broadcast message and the emergency broadcast instruction calculates a digital signature for an emergency broadcast information main body file, an emergency broadcast program resource file, an emergency broadcast message instruction file and an emergency broadcast transmission covering instruction by adopting a private key of the sending end, attaches the digital signature to the emergency broadcast message and the transmission covering data for transmission, and a receiving end of the emergency broadcast message and the emergency broadcast transmission covering data verifies the digital signature by adopting the public key of the sending end, so that the receiving end is ensured to only receive legal emergency broadcast messages and only process legal emergency broadcast instructions. Based on the safety protection mechanism provided at present, only the safety requirement of the emergency broadcast message in the transmission process can be ensured, but the safety of the data in the storage process cannot be ensured, no measure for preventing the data from being lost in the storage process is provided, and no means for detecting whether the data is lost is provided, namely, the data quality of the emergency broadcast message in the storage process is doubtful, so that the authenticity of subsequent data analysis and the reliability of future big data analysis are influenced.
The method for preventing the emergency broadcast data from being lost provided by the embodiment of the invention can detect whether the emergency broadcast message is lost or artificially deleted in the storage process, thereby ensuring the data quality of the emergency broadcast message, strictly controlling the data quality and providing guarantee for later-stage data utilization and big data analysis.
The following briefly introduces the emergency broadcast system and the emergency broadcast message:
point 1, emergency broadcast system construction.
Emergency broadcasting is a way to distribute emergency information to the public using a broadcast television system. Emergency broadcast systems are systems that distribute emergency information to the public. The most basic emergency broadcasting system is shown in fig. 1, and comprises an emergency broadcasting platform, a transmission overlay network and a receiving terminal.
The emergency broadcast platform collects, converges and shares emergency information from an emergency information source, makes an emergency broadcast message according to a standard format, and sends the emergency broadcast message to the belonging transmission coverage network. The command and the program are transmitted to the corresponding receiving terminal through the transmission overlay network, and the receiving terminal with the emergency broadcasting function is activated in a standby state and receives the emergency broadcasting program. The emergency broadcast system adopts a digital signature mode to ensure the safety of the transmission of the emergency broadcast messages among the platform, the transmission coverage network and the receiving terminal. The national emergency broadcast system is set as four-level emergency broadcast system of country, province, city and county according to administrative divisions, and forms an emergency broadcast system as shown in fig. 2. Each level of emergency broadcast platform receives emergency broadcast messages sent by a superior emergency broadcast platform and collects the emergency information from the current level of emergency information source and sends the emergency information to the corresponding transmission coverage network, the transmission coverage network converts the emergency broadcast messages into instructions for the receiving terminals to broadcast and transmits the instructions to the corresponding receiving terminals, and the receiving terminals with the emergency broadcast function are activated in a standby state to receive and broadcast emergency broadcast programs. The emergency broadcast system adopts a digital signature mode to ensure the safety of the transmission of emergency broadcast messages among all levels of emergency broadcast platforms.
Point 2, emergency broadcast message file structure.
The emergency broadcast platform is in butt joint with an emergency information source in a safe and reliable communication mode, and after source, format and integrity of emergency information transmitted by the emergency information source are verified, the emergency broadcast platform is converted into emergency broadcast information in a unified format according to emergency information release requirements. The emergency broadcast information comprises an emergency broadcast information main body file, an emergency broadcast information main body signature file and an emergency broadcast program resource file, and all the files are packaged in a TAR file mode. The emergency broadcast information main body file comprises emergency broadcast basic information, emergency broadcast contents, information recommendation release strategies, area information, extension information and the like, and can support the use of different languages. The emergency broadcast information file structure is shown in fig. 3.
The emergency broadcast platform generates an emergency broadcast message according to emergency broadcast contents and an information suggestive release strategy in the emergency broadcast information and in combination with the resource state of an emergency broadcast system, and sends the emergency broadcast message to the belonging transmission coverage network, the broadcast television frequency channel broadcast system and the superior and subordinate emergency broadcast platforms for further broadcast processing.
The emergency broadcast message files comprise emergency broadcast information main body files, emergency broadcast information main body signature files, emergency broadcast program resource files, emergency broadcast message instruction files and emergency broadcast message instruction signature files, and all the files are packaged in a TAR file mode. The emergency broadcast message file structure is shown in fig. 4.
And point 3, emergency broadcast message instruction file structure.
The structure diagram 5 of the emergency broadcast message instruction file includes a protocol version number, a packet type, a packet source object, a packet target object, a packet generation time, an associated packet, and an emergency broadcast message broadcast request.
And 4, signing a file format by the emergency broadcast message instruction.
The emergency broadcast message instruction signature file comprises a version number, associated emergency broadcast service data packet index information, a signature certificate serial number, a signature algorithm and a signature value, and is described by XML syntax, and the syntax structure is shown in FIG. 6. Wherein:
signature. Version: the version number of the format of the emergency broadcast message signature file is shown, the integer type is shown, and the value of the standard version is 1.
Signature. Relatedebd: indicating the index information of the associated emergency broadcast service data, and the lower element of the index information is the ID of the signed emergency broadcast service data packet.
Signature, relatedebd, ebdid: indicating the associated emergency broadcast service data packet ID, string type.
Certsn: indicating the serial number of the certificate used to sign the emergency broadcast message.
Signature. Signature algorithm: indicating that the signature algorithm is fixed to the string "SM2-SM3".
Signature. Signature value: the Base64 encoding that represents the signature value as signature data, the syntax format of which is shown in fig. 7, wherein:
SigTime: the representation signature time refers to the current time when the emergency broadcast instruction is signed and is represented by 32-bit UTC time.
CertificateSN: the number of the digital certificate at the sending end is indicated, the number of the digital certificate corresponding to the current instruction signature is indicated by 48 bits.
Signature: the representation digital signature data refers to the digital signature of the current instruction, and is represented by 512 bits.
Because the structure of the emergency broadcast message instruction file is introduced from GD/J082-2018 Emergency broadcast message Format Specification, and the format of the emergency broadcast message signature file is introduced from GD/J081-2018 Emergency broadcast safety protection technical Specification digital signature, the emergency broadcast message instruction file can only be complied with and cannot be randomly modified in the development process, and the addition and subtraction of data items can influence the butt joint with other developer products. For example, data items in the form of incrementing counters, may interfere with interfacing with other developer products because they do not comply with the specifications described above.
Point 5, implementation of digital signature techniques.
The emergency broadcast platform establishes a trust relationship by using a digital certificate trust list issued by a superior security service system, and the transmission overlay network and the receiving terminal establish the trust relationship by using the digital certificate trust list issued by the provincial level emergency broadcast platform security service system.
When a sender sends an emergency broadcast message to a receiver, the sender signs data to the message firstly, the receiver verifies the signature after receiving the emergency broadcast message, the receiver sends a receipt with a digital signature to the message sender after the signature verification is passed, and the message sender verifies the signature of the receipt after receiving the receipt. Fig. 8 shows an interactive process of an upper emergency broadcast platform sending an emergency broadcast message to a lower emergency broadcast platform. The interactive process of the emergency broadcast platform sending emergency broadcast messages to the transport overlay network is shown in fig. 9. The interactive process of transmitting an overlay network to send an emergency broadcast message to a receiving terminal is shown in fig. 10.
The sender digital certificate number in the emergency broadcast message signature file format is used for proving the authenticity of the identity of the sender, so that the illegal person intrusion is prevented, and the sender is prevented from being repudiated in the future. In order to prevent the receiver from repudiation in the future, the receiver is required to send a receipt with a digital signature to the sender after receiving the message, and the receipt indicates that the receiver receives the message file of the sender. The receiver verifies the authenticity of the identity of the sender by using the digital certificate number of the sender, and prevents illegal invasion; verifying whether the digital signature is true to verify the validity of the message source and prevent counterfeiting of the signature; verifying the integrity of the message through the associated service data to prevent tampering; meanwhile, the signature time is compared, the signature time is ensured to be larger than the signature time successfully verified last time, and replay attack is prevented.
As described above, it is true that intrusion prevention, tamper prevention, and replay prevention can be performed by data signatures, but the current emergency broadcasting system has no requirement for omission prevention. The omission is divided into two types, one is missing broadcast due to packet loss in the message transmission process, and the other is data loss generated in the storage process after broadcast, including unintentional loss and artificial deletion. According to general software development, the simple method for solving the problems is to add a counter in a data structure and record a message sending sequence number, so that the problems are solved. However, in the national emergency broadcasting system, the data structure is the national standard and cannot be changed randomly, and the addition and subtraction of data items can affect the docking with other developer products, so the embodiment of the invention uses the signature time data item in the emergency broadcast message instruction signature file format as a counter, solves the problem of data omission, and ensures the data quality.
As shown in fig. 11, the method for preventing emergency broadcast data loss according to the embodiment of the present invention can effectively ensure the quality of data storage in the emergency broadcast message system, and prevent emergency broadcast data loss. The specific implementation of the method is as follows:
it should be noted that the format of the signature time data item in the message instruction signature file is of a date-time type, that is, the signature date and the signature time are included; the date count value in the embodiment of the present invention is a signature date in a message instruction signature file, and the generation time of a data packet in the message instruction file corresponding to the message instruction signature file in the embodiment of the present invention is the signature time. For example, the message instructs the signature file to include a signature date and time of 12 months, 3 days, 12 in 2020: 00:00, where 2020, 12, 3 is a date count value used in this application to characterize the number of emergency broadcast messages, 12:00:00 is the data packet generation time in the message instruction file corresponding to the message instruction signature file. The embodiment of the invention adopts a new method to determine the signature time data item, wherein the date count value is determined as the signature date, and the data packet generation time in the message instruction file is determined as the signature time, so that the detection is realized, the data loss of the emergency broadcast message is prevented under the condition of ensuring that a new data structure is not changed and added, and the reliability of data storage is ensured.
It should be noted that, in order to detect the quality of service data of emergency broadcast messages stored in a service database, in the embodiment of the present invention, before backing up the service database each time, the number of the emergency broadcast messages that have been actually sent is determined, if the number of the emergency broadcast messages that have been sent is consistent, the data in the service database is backed up to the backup database, otherwise, in the embodiment of the present invention, under the condition that it is determined that the number of the emergency broadcast messages that have been sent is not consistent with the number of the emergency broadcast messages in the service database, it is determined what service data are lost at this time, so that according to the service data that have been backed up in the backup database or the service data that have been transmitted, the data recovery is performed on the service data that are lost in the service database, and the service database after the data recovery is backed up, thereby effectively preventing the service data from being lost. The data in this embodiment refers to the emergency broadcast message, that is, the data of the emergency broadcast message.
The service database in this implementation is used for storing service data of the emergency broadcast message, and the backup database is used for storing the service data in the backup service database.
Optionally, if the number already sent is consistent with the number of the emergency broadcast messages in the database, the emergency broadcast messages are backed up, and the service data of the emergency broadcast messages in the service database is stored in the backup database.
As an alternative implementation, the embodiment of the present invention determines the date count value by:
if the message instruction file is detected currently, determining a date count value in a message instruction signature file corresponding to the last detected message instruction file;
and accumulating the determined date count value by a fixed step length to obtain the date count value in the message instruction signature file corresponding to the currently detected message instruction file.
In the embodiment of the present invention, after a message instruction file is currently detected, a date count value is determined based on a fixed step size and a date count value in a message instruction signature file corresponding to a last detected message instruction file, and since only valid date and time values can be stored in a signature date and time in the instruction signature file, in an implementation, an initial date is set as an initial date count value, for example, 1 month and 1 day in 2000, and after the message instruction file is initially detected, the date count value in the message instruction signature file corresponding to the message instruction file is determined as the initial date count value.
Optionally, an initial date count value is generated through a date calculation function, and a date count value obtained by adding a fixed step length to the date count value is calculated, in the implementation, for convenience of calculation, the fixed step length may be set to be 1, adding 1 indicates that the date is added for 1 day, and the date is changed to 2000-01-02, and as understood from the perspective of the counter, we consider that a message with a signature is sent, and a service database has 1 message record. And adding 1 indicates that the date is added for 1 day, the date is changed into 2000-01-03, and as understood from the view of the counter, a signed message is considered to be sent, and 2 message records exist in the service database. A subtraction of two dates, e.g. 2000-01-03-2000-01 =2, is understood to be 2 days from a date point of view and 2 messages from a counter point of view, indicating that there are 2 message records in the traffic database.
As an optional implementation manner, the determining that the message instruction file is detected according to the embodiment of the present invention in the following manner includes:
and if the generation time of the data packet in the message instruction file is determined to be the latest time according to the generation time of the data packet in the message instruction file, determining that the message instruction file is detected currently.
As an optional implementation manner, the determining, according to a maximum date count value and an initial date count value in each message instruction signature file in a service database, the number of emergency broadcast messages that have been sent includes:
determining a difference between the maximum date count value and the initial date count value as the number of emergency broadcast messages that have been sent.
Optionally, the difference between the maximum date count value and the initial date count value is determined by a date calculation function.
As an alternative implementation, the determining of the missing date count value according to the embodiment of the present invention includes:
and determining the lost date count value according to the discontinuous date count value in each message instruction signature file in the service database.
It should be noted that, in the embodiment of the present invention, the date count value is obtained by successively accumulating fixed step lengths based on the initial date count value, if no date count value is lost, the difference between two adjacent date count values is a fixed step length, that is, all the date count values are considered to be continuous, and if the difference between two adjacent date count values is greater than the fixed step length, a breakpoint is considered to have occurred, and the date count value at the breakpoint is the lost date count value. For example, each message in the service database instructs the date count value in the signature file to be 2000-1-1, 2000-1-2, 2000-1-4, 2000-1-5, and the lost date count value is determined to be 2000-1-3 because a breakpoint occurs between 2000-1-2 and 2000-1-4.
It should be noted that the signature time data item in the embodiment of the present invention may also prevent replay attacks. Because the date and time are stored in the signature time data item, the method of accumulating the fixed step length can ensure that the date of the current signature is greater than the signature date successfully verified last time, thereby ensuring that the date of the current signature time data item is greater than the signature time data item successfully verified last time, and preventing replay attack.
As an alternative implementation manner, the embodiment of the present invention searches for a lost emergency broadcast message according to the lost date count value by any one of the following manners:
in the mode 1, if the lost date count value is not greater than the maximum date count value of the emergency broadcast messages already backed up, the lost emergency broadcast messages are searched from the backup database according to the lost date count value;
if the lost date count value is not greater than the maximum date count value of the emergency broadcast message which is backed up, it is indicated that the lost emergency broadcast message in the service database is the data backed up on the service database last time or the data before the backup on the service data last time, and since all the data in the service database has been backed up last time or before last time, only the lost emergency broadcast message needs to be searched from the backup database which is backed up last time, that is, the lost emergency broadcast message is searched from the backup database which is backed up last time. In implementation, according to the lost date count value, the emergency broadcast message identical to the date count value can be found from the date count value in each message instruction signature file in the backup database.
And 2, if the lost date count value is greater than the maximum date count value of the emergency broadcast message which is backed up, searching for the lost emergency broadcast message according to the transmission path of the emergency broadcast message by taking the latest backup time as the search starting time.
If the lost date count value is greater than the maximum date count value of the backup of the emergency broadcast message, the lost emergency broadcast message is data after the backup of the service database at the last time, because the lost emergency broadcast message is not backed up, the lost emergency broadcast message is searched according to the transmission path of the emergency broadcast message by taking the latest backup time as the search starting time, optionally, the lost emergency broadcast message is searched step by step according to the transmission level of each transmission node in the transmission path of the emergency broadcast message according to the sequence of the transmission level, and the message matched with the lost emergency broadcast message is searched from the emergency broadcast message transmitted by each node, wherein the transmission level is used for representing the sequence level of the transmission of the emergency broadcast message.
It should be noted that, once data is lost, it is necessary to find out whether the data before the last backup is lost or the data after the last backup is lost, if the data before the last backup is lost, the lost data may be recovered according to the last backup, and if the data after the last backup is lost, the lost emergency broadcast message may be searched for from the transmission path of the emergency broadcast message by tracking the emergency broadcast message after the start time, that is, by taking the last backup time as the start time of the search. The method provided by the embodiment can achieve the purpose of omission prevention of the emergency broadcasting system, thereby ensuring the data quality and providing a real guarantee for later data utilization and big data analysis.
As shown in fig. 12, an embodiment of the present invention provides a specific implementation method for preventing emergency broadcast data from being lost, where an implementation flow of the method is as follows:
1207, judging whether the lost date count value is larger than the maximum date count value backed up by the emergency broadcast message, if so, executing a step 1208, otherwise, executing a step 1209;
The embodiment of the invention can effectively prevent the loss or omission of the message data by changing the usage of the signature time data item, does not change the original anti-replay function, and successfully prevents the message data loss possibly generated by the service database. The date type data provided by the embodiment of the invention is used as a counter, so that the loss of message data can be effectively prevented, the quality of emergency broadcast message data is ensured, and the later-stage data utilization and big data analysis are guaranteed.
Example 2
Based on the same inventive concept, the embodiment of the present invention further provides a device for preventing emergency broadcast data from being lost, because the device is the device in the method in the embodiment of the present invention, and the principle of the device for solving the problem is similar to that of the method, the implementation of the device may refer to the implementation of the method, and repeated details are omitted.
As shown in fig. 13, the apparatus includes:
a quantity determining unit 1300, configured to determine, if backup of the emergency broadcast message is required, the quantity of the emergency broadcast messages that have been sent according to the maximum date count value and the initial date count value in each message instruction signature file in the service database; the data count value is determined based on a fixed step length and a date count value in a message instruction signature file corresponding to a last detected message instruction file after a message instruction file is detected currently, the date count value is used for representing the number of emergency broadcast messages, and the message instruction file and the message instruction signature file are located in emergency broadcast messages needing to be sent;
a missing search unit 1301, configured to search for a missing emergency broadcast message according to a missing date count value in the service database if the sent quantity is inconsistent with the quantity of the emergency broadcast message in the service database, and restore the missing emergency broadcast message to the service database.
As an optional implementation manner, the determining number unit is specifically configured to determine the date count value by:
if the message instruction file is detected currently, determining a date count value in a message instruction signature file corresponding to the last detected message instruction file;
and accumulating the determined date count value by a fixed step length to obtain the date count value in the message instruction signature file corresponding to the currently detected message instruction file.
As an optional implementation manner, the quantity determining unit is specifically configured to determine that a message instruction file is detected by:
and if the generation time of the data packet in the message instruction file is determined to be the latest time according to the generation time of the data packet in the message instruction file, determining that the message instruction file is detected currently.
As an optional implementation manner, the quantity determining unit is specifically configured to:
determining a difference between the maximum date count value and the initial date count value as the number of emergency broadcast messages that have been sent.
As an optional implementation manner, the finding loss unit is specifically configured to determine the lost date count value by:
and determining the lost date count value according to the discontinuous date count value in each message instruction signature file in the service database.
As an optional implementation manner, the find loss unit is specifically configured to:
if the lost date count value is not greater than the maximum date count value of the emergency broadcast message which is backed up, searching the lost emergency broadcast message from the backup database according to the lost date count value; or
And if the lost date count value is larger than the maximum date count value of the emergency broadcast message which is backed up, searching for the lost emergency broadcast message according to the transmission path of the emergency broadcast message by taking the latest backup time as the search starting time.
Example 3
Based on the same inventive concept, the embodiment of the present invention further provides a device for preventing emergency broadcast data from being lost, and since the device is a device in the method in the embodiment of the present invention and the principle of the device for solving the problem is similar to that of the method, the implementation of the device may refer to the implementation of the method, and repeated parts are not described again.
As shown in fig. 14, the apparatus comprises a processor 1400 and a memory 1401, the memory being adapted to store programs executable by the processor, the processor being adapted to read the programs in the memory and to perform the following steps:
if the emergency broadcast messages need to be backed up, determining the number of the emergency broadcast messages which have been sent according to the maximum date count value and the initial date count value in each message instruction signature file in the service database; the data count value is determined based on a fixed step length and a date count value in a message instruction signature file corresponding to a last detected message instruction file after a message instruction file is detected currently, the date count value is used for representing the number of emergency broadcast messages, and the message instruction file and the message instruction signature file are located in emergency broadcast messages needing to be sent;
and if the sent quantity is inconsistent with the quantity of the emergency broadcast messages in the service database, searching the lost emergency broadcast messages in the service database according to the lost date count value, and recovering the lost emergency broadcast messages to the service database.
As an alternative embodiment, the processor is configured to determine the date count value by:
if the message instruction file is detected currently, determining a date count value in a message instruction signature file corresponding to the last detected message instruction file;
and accumulating the determined date count value by a fixed step length to obtain the date count value in the message instruction signature file corresponding to the currently detected message instruction file.
As an alternative embodiment, the processor is configured to determine that a message instruction file is detected by:
and if the generation time of the data packet in the message instruction file is determined to be the latest time according to the generation time of the data packet in the message instruction file, determining that the message instruction file is detected currently.
As an alternative embodiment, the treatment appliance is configured to:
determining a difference between the maximum date count value and the initial date count value as the number of emergency broadcast messages that have been sent.
As an alternative embodiment, the processor is configured to determine the missing date count value by:
and determining the lost date count value according to the discontinuous date count value in each message instruction signature file in the service database.
As an alternative embodiment, the treatment appliance is configured to:
if the lost date count value is not greater than the maximum date count value of the emergency broadcast messages which are backed up, searching the emergency broadcast messages lost in the service database from the backup database according to the lost date count value; or
And if the lost date count value is larger than the maximum date count value of the emergency broadcast message which is backed up, searching for the lost emergency broadcast message according to the transmission path of the emergency broadcast message by taking the latest backup time as the search starting time.
Based on the same inventive concept, an embodiment of the present invention further provides a computer storage medium, on which a computer program is stored, which when executed by a processor implements the following steps:
if the emergency broadcast messages need to be backed up, determining the number of the emergency broadcast messages which have been sent according to the maximum date count value and the initial date count value in each message instruction signature file in the service database; the data count value is determined based on a fixed step length and a date count value in a message instruction signature file corresponding to a last detected message instruction file after a message instruction file is detected currently, the date count value is used for representing the number of emergency broadcast messages, and the message instruction file and the message instruction signature file are located in emergency broadcast messages needing to be sent;
and if the sent quantity is inconsistent with the quantity of the emergency broadcast messages in the service database, searching the lost emergency broadcast messages in the service database according to the lost date count value, and recovering the lost emergency broadcast messages to the service database.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A method for preventing data loss, the method comprising:
if the emergency broadcast messages need to be backed up, determining the quantity of the emergency broadcast messages which are sent according to the maximum date count value and the initial date count value in each message instruction signature file in a service database; the method comprises the steps that a date count value is determined based on a fixed step length and a date count value in a message instruction signature file corresponding to a last detected message instruction file after a message instruction file is detected currently, the date count value is used for representing the number of emergency broadcast messages, and the message instruction file and the message instruction signature file are located in the emergency broadcast messages needing to be sent;
and if the sent quantity is inconsistent with the quantity of the emergency broadcast messages in the service database, searching the lost emergency broadcast messages in the service database according to the lost date count value, and recovering the lost emergency broadcast messages to the service database.
2. The method of claim 1, wherein determining the date count value comprises:
if the message instruction file is detected currently, determining a date count value in a message instruction signature file corresponding to the last detected message instruction file;
and accumulating the determined date count value by a fixed step length to obtain the date count value in the message instruction signature file corresponding to the currently detected message instruction file.
3. The method of claim 1 or 2, wherein determining that a message instruction file is detected comprises:
and if the generation time of the data packet in the message instruction file is determined to be the latest time according to the generation time of the data packet in the message instruction file, determining that the message instruction file is detected currently.
4. The method of claim 1, wherein determining the number of emergency broadcast messages that have been sent based on a maximum date count value and an initial date count value in each message order signature file in a traffic database comprises:
determining a difference between the maximum date count value and the initial date count value as the number of emergency broadcast messages that have been sent.
5. The method of claim 1, wherein determining the missing date count value comprises:
and determining the lost date count value according to the discontinuous date count value in each message instruction signature file in the service database.
6. The method of any one of claims 1, 2, 4 and 5, wherein searching for a missing emergency broadcast message in the service database based on the missing date count value comprises:
if the lost date count value is not greater than the maximum date count value of the emergency broadcast messages already backed up, searching the emergency broadcast messages lost in the service database from the backup database according to the lost date count value; or
And if the lost date count value is larger than the maximum date count value of the emergency broadcast message which is backed up, searching for the lost emergency broadcast message in the service database according to the transmission path of the emergency broadcast message by taking the latest backup time as the search starting time.
7. An apparatus for preventing data loss, comprising:
the quantity determining unit is used for determining the quantity of the emergency broadcast messages sent according to the maximum date count value and the initial date count value in each message instruction signature file in the service database if the emergency broadcast messages need to be backed up; the method comprises the steps that a date count value is determined based on a fixed step length and a date count value in a message instruction signature file corresponding to a last detected message instruction file after a message instruction file is detected currently, the date count value is used for representing the number of emergency broadcast messages, and the message instruction file and the message instruction signature file are located in the emergency broadcast messages needing to be sent;
and the searching and losing unit is used for searching the lost emergency broadcast messages in the service database according to the lost date counting value and restoring the lost emergency broadcast messages to the service database if the sent quantity is inconsistent with the quantity of the emergency broadcast messages in the service database.
8. The apparatus according to claim 7, wherein the quantity determining unit is specifically configured to determine the date count value by:
if the message instruction file is detected currently, determining a date count value in a message instruction signature file corresponding to the last detected message instruction file;
and accumulating the determined date count value by a fixed step length to obtain the date count value in the message instruction signature file corresponding to the currently detected message instruction file.
9. An apparatus for preventing data loss, comprising a processor and a memory, said memory storing a program executable by said processor, said processor being adapted to read the program in said memory and to perform the steps of the method according to any one of claims 1 to 6.
10. A computer storage medium on which a computer program is stored, which program, when being executed by a processor, is adapted to carry out the steps of the method according to any one of claims 1 to 6.
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| WO2009133320A1 (en) * | 2008-04-25 | 2009-11-05 | Universite Paris Diderot - Paris 7 | Computer device for the time-based management of digital documents |
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| CN111262653A (en) * | 2020-01-07 | 2020-06-09 | 安徽文香信息技术有限公司 | Data packet loss resisting method, sending end, receiving end and related server |
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| CN100493002C (en) * | 2007-03-29 | 2009-05-27 | 北京中星微电子有限公司 | A method for computing the data loss in the network transfer |
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| WO2009133320A1 (en) * | 2008-04-25 | 2009-11-05 | Universite Paris Diderot - Paris 7 | Computer device for the time-based management of digital documents |
| CN102057616A (en) * | 2008-04-25 | 2011-05-11 | 狄德罗-巴黎第七大学 | Computer device for the time-based management of digital documents |
| CN108513701A (en) * | 2017-05-18 | 2018-09-07 | 深圳市大疆创新科技有限公司 | Data transmission method, equipment, machine readable storage medium and system |
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