CN113507631B - Digital television signal sending method and device for improving information security - Google Patents

Digital television signal sending method and device for improving information security Download PDF

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CN113507631B
CN113507631B CN202111040795.5A CN202111040795A CN113507631B CN 113507631 B CN113507631 B CN 113507631B CN 202111040795 A CN202111040795 A CN 202111040795A CN 113507631 B CN113507631 B CN 113507631B
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classification result
data
data blocks
sets
digital television
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CN113507631A (en
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刘艳娟
廖佳秋
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Shenzhen Justek Technology Co ltd
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Shenzhen Justek Technology Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
    • H04N21/26606—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for generating or managing entitlement messages, e.g. Entitlement Control Message [ECM] or Entitlement Management Message [EMM]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F18/00—Pattern recognition
    • G06F18/20—Analysing
    • G06F18/24—Classification techniques
    • G06F18/241—Classification techniques relating to the classification model, e.g. parametric or non-parametric approaches
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06N—COMPUTING ARRANGEMENTS BASED ON SPECIFIC COMPUTATIONAL MODELS
    • G06N20/00—Machine learning

Abstract

The application discloses a digital television signal sending method for improving information safety, which is characterized in that an original digital television signal is called, and a plurality of first data blocks are obtained according to a first data block splitting method; carrying out classification processing to correspondingly obtain a plurality of first classification result sets; if the plurality of first classification result sets are not uniform to be non-empty sets, performing message digest calculation processing to correspondingly obtain a plurality of first message digests; splitting the data blocks respectively to obtain a plurality of second data blocks; correspondingly obtaining a plurality of second classification result sets; if the plurality of second classification result sets are non-empty sets, a plurality of second message digests are correspondingly obtained; the method comprises the steps of processing an original digital television signal to obtain modified data, and sending the modified data, a first message digest, a plurality of first classification result sets, a plurality of second message digests and a plurality of second classification result sets to a digital television signal receiving end, so that the purpose of improving the information security of digital television signal transmission is achieved.

Description

Digital television signal sending method and device for improving information security
Technical Field
The present application relates to the field of computers, and in particular, to a method and an apparatus for transmitting digital television signals, which improve information security.
Background
In the data transmission process, information security needs to be considered. However, in conventional television signal transmission, the information security of conventional television signal transmission is not high due to the indiscriminate transmission characteristics of the broadcast network and the low requirements of conventional television signals for confidentiality.
However, the development of digital television technology has made important the information security of television signal transmission time-dependent (because absolute information security is difficult to achieve and requires large resources), which is embodied, for example, by: if the digital television signal is acquired and cracked by an unauthorized third party at the beginning of transmission, and an unauthorized imitation work is generated at the first time, the rights and interests of a television program corresponding to the digital television signal are difficult to guarantee; however, if the program can be obtained and cracked by an unauthorized third party within a second longer time, the damage of the unauthorized copy to the television program is greatly reduced (which is determined by the nature of the television program with high timeliness). However, the existing schemes lack a digital television signal transmission scheme that effectively improves information security.
Disclosure of Invention
The application provides a digital television signal sending method for improving information security, which is applied to a digital television signal sending end and comprises the following steps:
s1, calling an original digital television signal, and splitting the original digital television signal according to a preset first data block splitting method to obtain a plurality of first data blocks;
s2, classifying the first data blocks by adopting a preset arrangement rule classification model to correspondingly obtain a plurality of first classification result sets, and judging whether the first classification result sets are non-empty sets; each first classification result set is an empty set or a non-empty set, and when the first classification result set is the non-empty set, at least one arrangement rule is included;
s3, if the first classification result sets are not uniform to be non-empty sets, marking the first data blocks corresponding to the non-empty sets in the first classification result sets as first confirmation data blocks, and performing message digest calculation processing on all the first confirmation data blocks according to a preset first message digest algorithm to obtain a plurality of first message digests correspondingly;
s4, according to a preset second data block splitting method, splitting first data blocks corresponding to empty sets in the first classification result set respectively to obtain a plurality of second data blocks;
s5, classifying the second data blocks by adopting the arrangement rule classification model to correspondingly obtain a plurality of second classification result sets, and judging whether the second classification result sets are non-empty sets;
s6, if the second classification result sets are all non-empty sets, correspondingly marking the second data blocks as second confirmation data blocks, and respectively performing message digest calculation processing on the second confirmation data blocks according to a preset second message digest algorithm to correspondingly obtain second message digests;
and S7, modifying the original digital television signal according to a preset data modification method to obtain modified data, and performing digital signal broadcasting processing to send the modified data, the plurality of first message digests, the plurality of first classification result sets, the plurality of second message digests and the plurality of second classification result sets to a digital television signal receiving end in a preset broadcasting network.
Further, the first data block splitting method, the second data block splitting method, the first message digest algorithm and the second message digest algorithm are agreed in advance by the digital television signal transmitting terminal and the digital television signal receiving terminal;
and the first time data block splitting method, the second time data block splitting method, the first message digest algorithm and the second message digest algorithm are all modified periodically.
Further, before step S2, of classifying the plurality of first data blocks by using a preset arrangement rule classification model to correspondingly obtain a plurality of first classification result sets, and determining whether the plurality of first classification result sets are non-empty sets, the method includes:
s11, dividing a plurality of sample data groups according to a preset proportion to obtain a plurality of data groups for training and data groups for verification;
s12, calling a preset machine learning model, inputting the multiple training data sets into the machine learning model, and performing batch training processing to obtain an intermediate classification model; the batch training processing means that a plurality of batches of training are adopted in the training process, and each batch of training is only input with all data in one training data set for training;
s13, verifying the intermediate classification model by adopting the data set for verification to obtain an output result, and judging whether the output result is verified;
and S14, if the output result is that the verification is passed, taking the intermediate classification type as an arrangement rule classification model.
Further, after step S2 of adopting a preset arrangement rule classification model to classify the first data blocks to correspondingly obtain a first classification result set, and determining whether the first classification result sets are non-empty sets, the method includes:
s21, if the first classification result sets are all non-empty sets, performing message digest calculation processing on the first data blocks according to a preset third message digest algorithm to correspondingly obtain third message digests;
s22, modifying the original digital television signal according to a preset data modification method to obtain modified data;
and S23, performing digital signal broadcasting processing to send the modified data, the plurality of first classification result sets and the plurality of third message digests to a digital television signal receiving end in a preset broadcasting network.
Further, after the step S5 of adopting the arrangement rule classification model to classify the second data blocks to obtain a second classification result set, and determining whether the second classification result sets are non-empty sets, the method includes:
s51, if the plurality of second classification result sets are not uniformly non-empty sets, marking a second data block corresponding to a non-empty set in the second classification result set as a second confirmation data block, and performing message digest calculation processing on all the second confirmation data blocks according to a preset fourth message digest algorithm to obtain a plurality of fourth message digests correspondingly;
s52, according to a preset third data block splitting method, splitting second data blocks corresponding to the empty sets in the second classification result set respectively to obtain a plurality of third data blocks;
s53, classifying the third data blocks by adopting the arrangement rule classification model to correspondingly obtain a plurality of third classification result sets, and judging whether the third classification result sets are non-empty sets;
s54, if the third classification result sets are all non-empty sets, correspondingly marking the third data blocks as third confirmation data blocks, and respectively performing message digest calculation processing on the second confirmation data blocks according to a preset fifth message digest algorithm to correspondingly obtain fifth message digests;
s55, modifying the original digital television signal according to a preset data modification method to obtain modified data, and performing digital signal broadcasting processing to send the modified data, a plurality of first message digests, a plurality of first classification result sets, a plurality of fourth message digests, a plurality of second classification result sets, a plurality of fifth message digests, and a plurality of third classification result sets to a digital television signal receiving end in a preset broadcasting network.
Further, the step S7 of modifying the original digital television signal according to a preset data modification method to obtain modified data, and performing digital signal broadcasting processing to send the modified data, the plurality of first message digests, the plurality of first classification result sets, the plurality of second message digests, and the plurality of second classification result sets to a digital television signal receiving end in a preset broadcasting network includes:
s701, performing partial character replacement processing on the original digital television signal to replace the No. 0 character at the designated position with the No. 1 character, or replace the No. 1 character at the designated position with the No. 0 character, so as to obtain first temporary data; wherein the number of the designated positions is not greater than 1% of the total number of characters of the original digital television signal;
s702, according to the first data block splitting method and the second data block splitting method, sequentially splitting the first temporary data to obtain a plurality of second temporary data blocks and a plurality of third temporary data blocks; the plurality of second temporary data blocks correspond to the plurality of first data blocks one to one, and the plurality of third temporary data blocks correspond to the plurality of second data blocks one to one;
s703, correspondingly calculating character difference percentages between the plurality of second temporary data blocks and the plurality of first data blocks to obtain a plurality of first character difference percentages;
s704, correspondingly calculating character difference percentages between the plurality of third temporary data blocks and the plurality of second data blocks to obtain a plurality of second character difference percentages;
s705, judging whether the difference percentages of the first characters and the second characters are not more than 1%;
and S706, if the difference percentages of the first characters and the second characters are not more than 1%, performing digital signal broadcasting processing to send the modified data, the first message digests, the first classification result sets, the second message digests and the second classification result sets to a digital television signal receiving end in a preset broadcasting network.
The application provides a digital television signal transmission device for improving information security, is applied to digital television signal transmitting terminal, includes:
the system comprises a first data block splitting unit, a second data block splitting unit and a data processing unit, wherein the first data block splitting unit is used for calling an original digital television signal and splitting the original digital television signal according to a preset first data block splitting method to obtain a plurality of first data blocks;
a first classification result set obtaining unit, configured to perform classification processing on the plurality of first data blocks by using a preset arrangement rule classification model to obtain a plurality of first classification result sets correspondingly, and determine whether the plurality of first classification result sets are all non-empty sets; each first classification result set is an empty set or a non-empty set, and when the first classification result set is the non-empty set, at least one arrangement rule is included;
a first message digest calculation unit, configured to, if the plurality of first classification result sets are not uniformly non-empty sets, mark a first data block corresponding to a non-empty set in the first classification result set as a first acknowledgment data block, and perform message digest calculation processing on all the first acknowledgment data blocks according to a preset first message digest algorithm, so as to obtain a plurality of first message digests correspondingly;
a second data block splitting unit, configured to split, according to a preset second data block splitting method, first data blocks corresponding to empty sets in the first classification result set, respectively, so as to obtain multiple second data blocks;
a second classification result set obtaining unit, configured to use the arrangement rule classification model to classify the plurality of second data blocks so as to obtain a plurality of second classification result sets correspondingly, and determine whether each of the plurality of second classification result sets is a non-empty set;
the second type of message digest calculation unit is configured to, if the plurality of second classification result sets are all non-empty sets, correspondingly mark the plurality of second data blocks as a plurality of second acknowledgment data blocks, and perform message digest calculation processing on the plurality of second acknowledgment data blocks according to a preset second type of message digest algorithm to obtain a plurality of second message digests correspondingly;
and the digital signal sending unit is used for modifying the original digital television signal according to a preset data modification method to obtain modified data, and performing digital signal broadcasting processing to send the modified data, the plurality of first message digests, the plurality of first classification result sets, the plurality of second message digests and the plurality of second classification result sets to a digital television signal receiving end in a preset broadcasting network.
The present application provides a computer device comprising a memory storing a computer program and a processor implementing the steps of any of the above methods when the processor executes the computer program.
The present application provides a computer-readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method of any of the above.
According to the digital television signal sending method and device, the computer equipment and the storage medium for improving the information security, the original digital television signal is called, and a plurality of first data blocks are obtained according to a preset first data block splitting method; classifying the first data blocks to correspondingly obtain a plurality of first classification result sets; if the plurality of first classification result sets are not uniform to be non-empty sets, respectively performing message digest calculation processing on all the first confirmation data blocks to correspondingly obtain a plurality of first message digests; splitting the first data blocks corresponding to the empty sets in the first classification result set respectively to obtain a plurality of second data blocks; correspondingly obtaining a plurality of second classification result sets; if the plurality of second classification result sets are non-empty sets, a plurality of second message digests are correspondingly obtained; and modifying the original digital television signal to obtain modified data, and sending the modified data, the plurality of first message digests, the plurality of first classification result sets, the plurality of second message digests and the plurality of second classification result sets to a digital television signal receiving end, so that the aim of improving the information security of digital television signal transmission is fulfilled.
Drawings
Fig. 1 is a schematic flowchart of a method for transmitting a digital television signal with improved information security according to an embodiment of the present application;
fig. 2 is a block diagram illustrating a structure of a computer device according to an embodiment of the present application.
The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Referring to fig. 1, an embodiment of the present application provides a method for sending a digital television signal with improved information security, which is applied to a digital television signal sending end, and includes:
s1, calling an original digital television signal, and splitting the original digital television signal according to a preset first data block splitting method to obtain a plurality of first data blocks;
s2, classifying the first data blocks by adopting a preset arrangement rule classification model to correspondingly obtain a plurality of first classification result sets, and judging whether the first classification result sets are non-empty sets; each first classification result set is an empty set or a non-empty set, and when the first classification result set is the non-empty set, at least one arrangement rule is included;
s3, if the first classification result sets are not uniform to be non-empty sets, marking the first data blocks corresponding to the non-empty sets in the first classification result sets as first confirmation data blocks, and performing message digest calculation processing on all the first confirmation data blocks according to a preset first message digest algorithm to obtain a plurality of first message digests correspondingly;
s4, according to a preset second data block splitting method, splitting first data blocks corresponding to empty sets in the first classification result set respectively to obtain a plurality of second data blocks;
s5, classifying the second data blocks by adopting the arrangement rule classification model to correspondingly obtain a plurality of second classification result sets, and judging whether the second classification result sets are non-empty sets;
s6, if the second classification result sets are all non-empty sets, correspondingly marking the second data blocks as second confirmation data blocks, and respectively performing message digest calculation processing on the second confirmation data blocks according to a preset second message digest algorithm to correspondingly obtain second message digests;
and S7, modifying the original digital television signal according to a preset data modification method to obtain modified data, and performing digital signal broadcasting processing to send the modified data, the plurality of first message digests, the plurality of first classification result sets, the plurality of second message digests and the plurality of second classification result sets to a digital television signal receiving end in a preset broadcasting network.
The digital television signal transmission scheme can improve information security, is not realized according to a data encryption technology, such as a symmetric key encryption technology or an asymmetric key encryption technology, and can be superimposed with the data encryption technology in order to further improve the information security. Specifically, the data to be transmitted, that is, the modified data, the plurality of first message digests, the plurality of first classification result sets, the plurality of second message digests, and the plurality of second classification result sets, may be encrypted by using a data encryption technique to obtain encrypted data, and then the encrypted data is transmitted to the digital television signal receiving end. Alternatively, the digital television signal may be encrypted first, and then the encrypted data may be recorded as the original digital television signal.
However, it should be noted that the digital television signal transmission is directed to a plurality of digital television signal receiving ends, and the number of the digital television signal receiving ends is large, so that it is not suitable for transmitting data by using asymmetric encryption technology, but only using symmetric encryption technology generally uses the same symmetric key at the plurality of digital television signal receiving ends, and in this case, the confidentiality of the symmetric key is poor, so that the information security during the transmission process cannot be guaranteed. This is the reason that the common encryption technology is difficult to be applied in the field of digital television signal transmission, and is also the reason that the information security in the process of digital television signal transmission is difficult to be ensured.
However, the information security of the present application does not relate to the data encryption technology (of course, the data encryption technology may be superimposed), but improves the information security of the digital television signal by a special design. The method comprises the following steps of splitting a data block, classifying an arrangement rule classification model, calculating a message digest algorithm, modifying a digital television signal, transmitting the signal and the like. In this way, an unauthorized third party is difficult to acquire the original data television signal, and the digital television signal receiving end can return the original data television signal on the basis of the received data, so as to improve the information security. The specific process will be described in conjunction with the implementation steps.
As described in the above steps S1-S3, the original digital television signal is called, and the original digital television signal is split according to a preset first data block splitting method to obtain a plurality of first data blocks; classifying the first data blocks by adopting a preset arrangement rule classification model to correspondingly obtain a plurality of first classification result sets, and judging whether the first classification result sets are non-empty sets or not; each first classification result set is an empty set or a non-empty set, and when the first classification result set is the non-empty set, at least one arrangement rule is included; if the plurality of first classification result sets are not uniform to be non-empty sets, recording first data blocks corresponding to the non-empty sets in the first classification result sets as first confirmation data blocks, and performing message digest calculation processing on all the first confirmation data blocks according to a preset first message digest algorithm to correspondingly obtain a plurality of first message digests.
The first data block splitting method is to split long-string data into short-string data, and the reason for this splitting is that the long-string data is less likely to be regularly arranged, and the short-string data is more likely to be regularly arranged. The implementation of the present application has a premise that the original digital television signal needs to be split into regularly arranged data blocks, so that at least one data block splitting process is required.
Since the digital television signal is in the form of a binary symbol string, the data block obtained by splitting is also in the form of a binary symbol string. The first data block splitting method may be any feasible method, for example, a partition extraction method is adopted to extract the first, fifth, and ninth … binary characters to form a data block; the second, sixth and tenth … binary characters are extracted to form another data block, so that four data blocks can be obtained (the number of the split data blocks should be actually more than four, which is only for the sake of example and is not taken as a basis for limiting the number of the data blocks). Other splitting methods are also possible, and the splitting method itself is not the focus in the present application, and the important point is that the data blocks obtained after splitting should be regularly arranged. Certainly, the result of the first splitting may not be ideal, and it cannot be guaranteed that the data blocks are regularly arranged, so that the second and third splitting may be continued until all the data blocks are regularly arranged. In addition, the data block splitting of the next time is to split the data block obtained by the previous splitting, but not to split the original digital television signal.
The method comprises the steps that whether data blocks are regularly arranged or not is analyzed and processed by adopting an arrangement rule classification model, a plurality of first classification result sets are obtained and are reflected by analysis and processing, and when one data block is not regularly arranged, the first classification result set is an empty set; when a data block is arranged according to only one rule, the first classification result set only comprises one arrangement rule; when a data block is arranged according to two rules (which is less the case, but may also occur), the first classification result set includes two rules. The arrangement rules are, for example, that odd bits are all the same character; arranging according to an arithmetic progression; the first third is the first identical character, the middle third is the second identical character, and the last third is the interval 0 character and 1 character. These arrangements may be any feasible arrangement, and the above examples are only used for convenience of illustration and are not intended to limit the present application.
Further, the arrangement rule classification model is obtained by training a pre-collected sample data set on the basis of a preset machine learning model; the sample data set comprises a plurality of sample data groups, each sample data group comprises a plurality of sample data, each data in the sample data set is binary data arranged according to a preset sequence, and the arrangement rules corresponding to different sample data in the same sample data group are different. Therefore, the arrangement rule classification model is obtained by training on the basis of a preset machine learning model and is obtained by training in a semi-supervised learning mode, and each sample data has a corresponding arrangement rule. The machine learning model may employ any feasible model, such as a neural network model, a support vector machine model, and so forth. Because the machine learning models can meet the requirement of classification after being fully trained, sufficient binary character data with the arrangement rule are collected in advance to serve as sample data, and the models for classifying the arrangement rule can be trained in a semi-supervised learning mode. Each data in the sample data set of the present application is binary data arranged in a predetermined order, which means that the arrangement rule corresponding to the sample data in the sample data set is known, which corresponds to the labeling step that the sample data needs to be subjected to during model training.
In addition, a special design exists in the sample data set of the application, namely the arrangement rules corresponding to different sample data in the same sample data group are different. This makes batch training possible for the present application.
If the plurality of first classification result sets are not uniform to be non-empty sets, it indicates that not all the first data blocks are arranged regularly, and therefore the requirement of information transmission is not met, and further data block splitting processing is still required. In the first data blocks, some first data blocks which have the arrangement rule do not need to be split again, so the data blocks are marked as first confirmation data blocks, and then the message digest calculation processing is carried out to correspondingly obtain a plurality of first message digests. The reason why the message digest calculation is required is that the application does not send the first acknowledgment data block itself, but instead sends the message digest corresponding to the first acknowledgment data block. It should be noted that the message digest algorithm itself is not an encryption algorithm, and it is an irreversible algorithm, so that theoretically, the first acknowledgment data block cannot be pushed back based on the message digest only, thereby ensuring information security.
However, the receiving end of the digital television signal can reversely push back the first confirmation data block, which of course cannot be based only on the corresponding message digest, but also needs to know the first data block splitting method, the first message digest algorithm, the corresponding arrangement rule, and the modified data obtained by modifying the original digital television signal (only a few binary characters can be modified during modification). Specifically, the backward pushing process is that the digital television signal receiving end tries to adjust the modified data, the adjustment is related to the first data block splitting method, namely, the modified data is also split into corresponding data blocks to obtain a plurality of new data blocks, then each new data block is respectively subjected to fine adjustment, the fine adjustment needs to enable the data blocks with the height to have a corresponding arrangement rule (therefore, the number of times of the fine adjustment is limited, and excessive calculation power is not consumed), then the same information summary calculation is carried out on the data blocks subjected to the fine adjustment, and if the obtained new information summary is completely the same as the original information summary, the backward pushing process of the data blocks is successful. The above explanation, although only for the first acknowledgment data block, is equally applicable for the second acknowledgment data block, and possibly other acknowledgment data blocks. The single information summarization algorithm is extremely short in time consumption, and the number of times of information summarization calculation required is limited, so that the implementation process of the method is short in time consumption and high in speed. The first message digest algorithm may adopt any feasible algorithm, such as MD2, MD4, MD5, etc., and may also adopt SHA256 algorithm, etc. Further, the first message digest algorithm and the second message digest algorithm may be the same, different, and preferably different.
For example, assuming that the modified data is 0110010110 …, a new data block 0110010110 can be removed by the first data block splitting method, and the corresponding arrangement rule is that odd-numbered characters are the same and even-numbered characters 0 and 1 are arranged at intervals, then 0110010110 has a limited possibility, for example, 0100010000 is a possible corresponding first confirmation data block, and then 0100010000 is subjected to calculation by the first message digest algorithm to determine whether the calculation result is the same as the corresponding message digest value; if they are the same, 0100010000 is indeed correct. Of course, in practical applications, the length of the first acknowledgment data block is generally much larger than the character length, which is only for convenience of explaining the data playback process.
Further, the first data block splitting method, the second data block splitting method, the first message digest algorithm and the second message digest algorithm are agreed in advance by the digital television signal transmitting terminal and the digital television signal receiving terminal;
and the first time data block splitting method, the second time data block splitting method, the first message digest algorithm and the second message digest algorithm are all modified periodically.
Therefore, the digital television signal receiving end can perform backward pushing processing on the data block to obtain the original digital television signal and perform playing processing. From the foregoing description of the reverse pushing process of the first acknowledgment data block, it can be seen that the digital television signal receiving end still needs to perform the reverse pushing process by using the first data block splitting method, the second data block splitting method, the first message digest algorithm, and the second message digest algorithm, but the first data block splitting method, the second data block splitting method, the first message digest algorithm, and the second message digest algorithm cannot be simultaneously transmitted with the digital television signal, so that the digital television signal transmitting end and the digital television signal receiving end agree in advance with the first data block splitting method, the second data block splitting method, the first message digest algorithm, and the second message digest algorithm, and also need to modify periodically to ensure information security. And an unauthorized third party cannot know the first data block splitting method, the second data block splitting method, the first message digest algorithm and the second message digest algorithm in a short time, so that the original digital television signal cannot be obtained through cracking.
Further, before step S2, of classifying the plurality of first data blocks by using a preset arrangement rule classification model to correspondingly obtain a plurality of first classification result sets, and determining whether the plurality of first classification result sets are non-empty sets, the method includes:
s11, dividing a plurality of sample data groups according to a preset proportion to obtain a plurality of data groups for training and data groups for verification;
s12, calling a preset machine learning model, inputting the multiple training data sets into the machine learning model, and performing batch training processing to obtain an intermediate classification model; the batch training processing means that a plurality of batches of training are adopted in the training process, and each batch of training is only input with all data in one training data set for training;
s13, verifying the intermediate classification model by adopting the data set for verification to obtain an output result, and judging whether the output result is verified;
and S14, if the output result is that the verification is passed, taking the intermediate classification type as an arrangement rule classification model.
Therefore, the method and the device can adopt a special training mode to optimize the training process of the model. That is, the present application adopts a batch training processing manner to ensure the universality of the arrangement rule classification model of the present application for data with different arrangement rules, which is also the reason why the present application adopts special training data, that is, the sample data set includes a plurality of sample data groups, each sample data group includes a plurality of sample data, each data in the sample data set is binary data arranged according to a predefined order, and the arrangement rules corresponding to different sample data in the same sample data group are different.
Further, after step S2 of adopting a preset arrangement rule classification model to classify the first data blocks to correspondingly obtain a first classification result set, and determining whether the first classification result sets are non-empty sets, the method includes:
s21, if the first classification result sets are all non-empty sets, performing message digest calculation processing on the first data blocks according to a preset third message digest algorithm to correspondingly obtain third message digests;
s22, modifying the original digital television signal according to a preset data modification method to obtain modified data;
and S23, performing digital signal broadcasting processing to send the modified data, the plurality of first classification result sets and the plurality of third message digests to a digital television signal receiving end in a preset broadcasting network.
Therefore, the digital signal can be transmitted only by performing one round of message digest calculation under the necessary condition. In a possible case, namely the splitting of the first data block is very accurate, so that any one of the split data blocks is regularly arranged, the splitting is not required to be carried out continuously, signal modification processing can be directly carried out to obtain modified data, and the modified data, the plurality of first classification result sets and the plurality of third message digests are sent.
As described in the foregoing steps S4-S7, according to a preset second data chunk splitting method, splitting the first data chunks corresponding to the empty sets in the first classification result set, respectively, so as to obtain a plurality of second data chunks; classifying the plurality of second data blocks by adopting the arrangement rule classification model to correspondingly obtain a plurality of second classification result sets, and judging whether the plurality of second classification result sets are non-empty sets; if the plurality of second classification result sets are non-empty sets, correspondingly marking the plurality of second data blocks as a plurality of second confirmation data blocks, and respectively performing message digest calculation processing on the plurality of second confirmation data blocks according to a preset second message digest algorithm to correspondingly obtain a plurality of second message digests; and modifying the original digital television signal according to a preset data modification method to obtain modified data, and performing digital signal broadcasting processing to send the modified data, the plurality of first message digests, the plurality of first classification result sets, the plurality of second message digests and the plurality of second classification result sets to a digital television signal receiving end in a preset broadcasting network.
The second data block splitting method may be the same as or different from the first data block splitting method, but the two splitting methods are not for the same object, the first data block splitting method is for the original digital television signal (which may be regarded as one data block), and the second data block splitting method is for the first data blocks except for the first confirmation data block. The same as the first data block splitting method, the second data block splitting method itself is also unimportant, and the important is the splitting result, so the arrangement rule classification model is also adopted to classify the splitting result (the plurality of second data blocks) so as to correspondingly obtain a plurality of second classification result sets.
If the plurality of second classification result sets are all non-empty sets, all the second data blocks are regularly arranged, so that the addition of the previous first confirmation data block can ensure that all the data blocks obtained by splitting are regularly arranged, and the requirement of digital television signal transmission is met. Accordingly, a second message digest calculation is performed, and the second message digest algorithm employed is preferably different from the first message digest algorithm.
The data modification method may be any feasible method, and the data modification method itself is not important, and any feasible method may be adopted as described above. The data modification is performed in order not to directly transmit the original digital television signal, thereby improving information security. However, at the cost, the present application cannot send only modified data, and must also send the plurality of first message digests, the plurality of first classification result sets, the plurality of second message digests, and the plurality of second classification result sets. The process of the data receiving terminal pushing back the original digital television signal is as described above, and is not described herein again.
Further, after the step S5 of adopting the arrangement rule classification model to classify the second data blocks to obtain a second classification result set, and determining whether the second classification result sets are non-empty sets, the method includes:
s51, if the plurality of second classification result sets are not uniformly non-empty sets, marking a second data block corresponding to a non-empty set in the second classification result set as a second confirmation data block, and performing message digest calculation processing on all the second confirmation data blocks according to a preset fourth message digest algorithm to obtain a plurality of fourth message digests correspondingly;
s52, according to a preset third data block splitting method, splitting second data blocks corresponding to the empty sets in the second classification result set respectively to obtain a plurality of third data blocks;
s53, classifying the third data blocks by adopting the arrangement rule classification model to correspondingly obtain a plurality of third classification result sets, and judging whether the third classification result sets are non-empty sets;
s54, if the third classification result sets are all non-empty sets, correspondingly marking the third data blocks as third confirmation data blocks, and respectively performing message digest calculation processing on the second confirmation data blocks according to a preset fifth message digest algorithm to correspondingly obtain fifth message digests;
s55, modifying the original digital television signal according to a preset data modification method to obtain modified data, and performing digital signal broadcasting processing to send the modified data, a plurality of first message digests, a plurality of first classification result sets, a plurality of fourth message digests, a plurality of second classification result sets, a plurality of fifth message digests, and a plurality of third classification result sets to a digital television signal receiving end in a preset broadcasting network.
According to the method and the device, all the split data blocks are required to be arranged according to the corresponding arrangement rules, so that the data blocks can be split for three times, even for more times, until the split data blocks are classified by the arrangement rule classification model, the obtained classification result set is a non-empty set. And then sending the message abstract, the modified data and the corresponding classification result set (representing the arrangement rule) corresponding to the split data block to a digital television signal receiving end.
Further, the step S7 of modifying the original digital television signal according to a preset data modification method to obtain modified data, and performing digital signal broadcasting processing to send the modified data, the plurality of first message digests, the plurality of first classification result sets, the plurality of second message digests, and the plurality of second classification result sets to a digital television signal receiving end in a preset broadcasting network includes:
s701, performing partial character replacement processing on the original digital television signal to replace the No. 0 character at the designated position with the No. 1 character, or replace the No. 1 character at the designated position with the No. 0 character, so as to obtain first temporary data; wherein the number of the designated positions is not greater than 1% of the total number of characters of the original digital television signal;
s702, according to the first data block splitting method and the second data block splitting method, sequentially splitting the first temporary data to obtain a plurality of second temporary data blocks and a plurality of third temporary data blocks; the plurality of second temporary data blocks correspond to the plurality of first data blocks one to one, and the plurality of third temporary data blocks correspond to the plurality of second data blocks one to one;
s703, correspondingly calculating character difference percentages between the plurality of second temporary data blocks and the plurality of first data blocks to obtain a plurality of first character difference percentages;
s704, correspondingly calculating character difference percentages between the plurality of third temporary data blocks and the plurality of second data blocks to obtain a plurality of second character difference percentages;
s705, judging whether the difference percentages of the first characters and the second characters are not more than 1%;
and S706, if the difference percentages of the first characters and the second characters are not more than 1%, performing digital signal broadcasting processing to send the modified data, the first message digests, the first classification result sets, the second message digests and the second classification result sets to a digital television signal receiving end in a preset broadcasting network.
Therefore, data is modified by adopting a character replacement mode, a specific replacement mode is not limited, but the number of the specified positions is ensured to be not more than 1% of the total number of characters of the original digital television signal, so that excessive calculation is not spent in the subsequent reverse pushing process. Further, the value of 1% may be even lower, for example, in parts per thousand, parts per million. The higher the value, the better the information security, but the more computation effort is consumed in the reverse thrust; the lower the value, the poorer the information security, but the easier it is to reverse, so the value can be adjusted as needed in practical applications.
Another important point is that the character ratio of each data block to be modified is also not higher than this value, i.e. neither the first character difference percentages nor the second character difference percentages are greater than 1%. Only after the condition is met, signal sending processing is carried out so as to send the modified data, the plurality of first message digests, the plurality of first classification result sets, the plurality of second message digests and the plurality of second classification result sets to a digital television signal receiving end, and therefore balance between information safety and digital television playing is guaranteed.
According to the digital television signal sending method for improving information safety, an original digital television signal is called, and a plurality of first data blocks are obtained according to a preset first data block splitting method; classifying the first data blocks to correspondingly obtain a plurality of first classification result sets; if the plurality of first classification result sets are not uniform to be non-empty sets, respectively performing message digest calculation processing on all the first confirmation data blocks to correspondingly obtain a plurality of first message digests; splitting the first data blocks corresponding to the empty sets in the first classification result set respectively to obtain a plurality of second data blocks; correspondingly obtaining a plurality of second classification result sets; if the plurality of second classification result sets are non-empty sets, a plurality of second message digests are correspondingly obtained; and modifying the original digital television signal to obtain modified data, and sending the modified data, the plurality of first message digests, the plurality of first classification result sets, the plurality of second message digests and the plurality of second classification result sets to a digital television signal receiving end, so that the aim of improving the information security of digital television signal transmission is fulfilled.
The embodiment of the application provides a digital television signal transmitting device for improving information security, which is applied to a digital television signal transmitting terminal and comprises:
the system comprises a first data block splitting unit, a second data block splitting unit and a data processing unit, wherein the first data block splitting unit is used for calling an original digital television signal and splitting the original digital television signal according to a preset first data block splitting method to obtain a plurality of first data blocks;
a first classification result set obtaining unit, configured to perform classification processing on the plurality of first data blocks by using a preset arrangement rule classification model to obtain a plurality of first classification result sets correspondingly, and determine whether the plurality of first classification result sets are all non-empty sets; each first classification result set is an empty set or a non-empty set, and when the first classification result set is the non-empty set, at least one arrangement rule is included;
a first message digest calculation unit, configured to, if the plurality of first classification result sets are not uniformly non-empty sets, mark a first data block corresponding to a non-empty set in the first classification result set as a first acknowledgment data block, and perform message digest calculation processing on all the first acknowledgment data blocks according to a preset first message digest algorithm, so as to obtain a plurality of first message digests correspondingly;
a second data block splitting unit, configured to split, according to a preset second data block splitting method, first data blocks corresponding to empty sets in the first classification result set, respectively, so as to obtain multiple second data blocks;
a second classification result set obtaining unit, configured to use the arrangement rule classification model to classify the plurality of second data blocks so as to obtain a plurality of second classification result sets correspondingly, and determine whether each of the plurality of second classification result sets is a non-empty set;
the second type of message digest calculation unit is configured to, if the plurality of second classification result sets are all non-empty sets, correspondingly mark the plurality of second data blocks as a plurality of second acknowledgment data blocks, and perform message digest calculation processing on the plurality of second acknowledgment data blocks according to a preset second type of message digest algorithm to obtain a plurality of second message digests correspondingly;
and the digital signal sending unit is used for modifying the original digital television signal according to a preset data modification method to obtain modified data, and performing digital signal broadcasting processing to send the modified data, the plurality of first message digests, the plurality of first classification result sets, the plurality of second message digests and the plurality of second classification result sets to a digital television signal receiving end in a preset broadcasting network.
The operations performed by the units are respectively corresponding to the steps of the method for sending digital television signals for improving information security of the foregoing embodiment one by one, and are not described herein again.
According to the digital television signal transmitting device for improving information safety, an original digital television signal is called, and a plurality of first data blocks are obtained according to a preset first data block splitting method; classifying the first data blocks to correspondingly obtain a plurality of first classification result sets; if the plurality of first classification result sets are not uniform to be non-empty sets, respectively performing message digest calculation processing on all the first confirmation data blocks to correspondingly obtain a plurality of first message digests; splitting the first data blocks corresponding to the empty sets in the first classification result set respectively to obtain a plurality of second data blocks; correspondingly obtaining a plurality of second classification result sets; if the plurality of second classification result sets are non-empty sets, a plurality of second message digests are correspondingly obtained; and modifying the original digital television signal to obtain modified data, and sending the modified data, the plurality of first message digests, the plurality of first classification result sets, the plurality of second message digests and the plurality of second classification result sets to a digital television signal receiving end, so that the aim of improving the information security of digital television signal transmission is fulfilled.
Referring to fig. 2, an embodiment of the present invention further provides a computer device, where the computer device may be a server, and an internal structure of the computer device may be as shown in the figure. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the computer designed processor is used to provide computational and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used for storing data used by the digital television signal transmission method for improving information security. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a digital television signal transmission method for improving information security.
The processor executes the method for sending digital television signals for improving information security, wherein the steps of the method are in one-to-one correspondence with the steps of executing the method for sending digital television signals for improving information security of the foregoing embodiment, and are not described herein again.
It will be understood by those skilled in the art that the structures shown in the drawings are only block diagrams of some of the structures associated with the embodiments of the present application and do not constitute a limitation on the computer apparatus to which the embodiments of the present application may be applied.
The computer equipment of the application calls an original digital television signal and obtains a plurality of first data blocks according to a preset first data block splitting method; classifying the first data blocks to correspondingly obtain a plurality of first classification result sets; if the plurality of first classification result sets are not uniform to be non-empty sets, respectively performing message digest calculation processing on all the first confirmation data blocks to correspondingly obtain a plurality of first message digests; splitting the first data blocks corresponding to the empty sets in the first classification result set respectively to obtain a plurality of second data blocks; correspondingly obtaining a plurality of second classification result sets; if the plurality of second classification result sets are non-empty sets, a plurality of second message digests are correspondingly obtained; and modifying the original digital television signal to obtain modified data, and sending the modified data, the plurality of first message digests, the plurality of first classification result sets, the plurality of second message digests and the plurality of second classification result sets to a digital television signal receiving end, so that the aim of improving the information security of digital television signal transmission is fulfilled.
An embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored thereon, and when the computer program is executed by a processor, the method for sending a digital television signal for improving information security is implemented, where steps included in the method are in one-to-one correspondence with steps of executing the method for sending a digital television signal for improving information security of the foregoing embodiment, and are not described herein again.
The computer-readable storage medium of the application calls an original digital television signal and obtains a plurality of first data blocks according to a preset first data block splitting method; classifying the first data blocks to correspondingly obtain a plurality of first classification result sets; if the plurality of first classification result sets are not uniform to be non-empty sets, respectively performing message digest calculation processing on all the first confirmation data blocks to correspondingly obtain a plurality of first message digests; splitting the first data blocks corresponding to the empty sets in the first classification result set respectively to obtain a plurality of second data blocks; correspondingly obtaining a plurality of second classification result sets; if the plurality of second classification result sets are non-empty sets, a plurality of second message digests are correspondingly obtained; and modifying the original digital television signal to obtain modified data, and sending the modified data, the plurality of first message digests, the plurality of first classification result sets, the plurality of second message digests and the plurality of second classification result sets to a digital television signal receiving end, so that the aim of improving the information security of digital television signal transmission is fulfilled.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, apparatus, article, or method that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, apparatus, article, or method. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, apparatus, article, or method that includes the element.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims (9)

1. A method for sending digital television signals for improving information security is characterized in that the method is applied to a digital television signal sending end and comprises the following steps:
s1, calling an original digital television signal, and splitting the original digital television signal according to a preset first data block splitting method to obtain a plurality of first data blocks;
s2, classifying the first data blocks by adopting a preset arrangement rule classification model to correspondingly obtain a plurality of first classification result sets, and judging whether the first classification result sets are non-empty sets; each first classification result set is an empty set or a non-empty set, and when the first classification result set is the non-empty set, at least one arrangement rule is included;
s3, if the first classification result sets are not uniform to be non-empty sets, marking the first data blocks corresponding to the non-empty sets in the first classification result sets as first confirmation data blocks, and performing message digest calculation processing on all the first confirmation data blocks according to a preset first message digest algorithm to obtain a plurality of first message digests correspondingly;
s4, according to a preset second data block splitting method, splitting first data blocks corresponding to empty sets in the first classification result set respectively to obtain a plurality of second data blocks;
s5, classifying the second data blocks by adopting the arrangement rule classification model to correspondingly obtain a plurality of second classification result sets, and judging whether the second classification result sets are non-empty sets;
s6, if the second classification result sets are all non-empty sets, correspondingly marking the second data blocks as second confirmation data blocks, and respectively performing message digest calculation processing on the second confirmation data blocks according to a preset second message digest algorithm to correspondingly obtain second message digests;
and S7, modifying the original digital television signal according to a preset data modification method to obtain modified data, and performing digital signal broadcasting processing to send the modified data, the plurality of first message digests, the plurality of first classification result sets, the plurality of second message digests and the plurality of second classification result sets to a digital television signal receiving end in a preset broadcasting network.
2. The method for sending digital television signals with improved information security as claimed in claim 1, wherein the first data block splitting method, the second data block splitting method, the first message digest algorithm and the second message digest algorithm are agreed in advance by a digital television signal sending end and a digital television signal receiving end;
and the first time data block splitting method, the second time data block splitting method, the first message digest algorithm and the second message digest algorithm are all modified periodically.
3. The method for sending digital television signals with improved information security according to claim 1, wherein before step S2, in which a preset arrangement rule classification model is adopted to classify the first data blocks so as to obtain a plurality of first classification result sets correspondingly, and whether the first classification result sets are all non-empty sets is determined, the method comprises:
s11, dividing a plurality of sample data groups according to a preset proportion to obtain a plurality of data groups for training and data groups for verification;
s12, calling a preset machine learning model, inputting the multiple training data sets into the machine learning model, and performing batch training processing to obtain an intermediate classification model; the batch training processing means that a plurality of batches of training are adopted in the training process, and each batch of training is only input with all data in one training data set for training;
s13, verifying the intermediate classification model by adopting the data set for verification to obtain an output result, and judging whether the output result is verified;
and S14, if the output result is that the verification is passed, taking the intermediate classification model as an arrangement rule classification model.
4. The method for sending digital television signals with improved information security according to claim 1, wherein after the step S2 of classifying the plurality of first data blocks by using a preset arrangement rule classification model to obtain a plurality of first classification result sets correspondingly, and determining whether the plurality of first classification result sets are all non-empty sets, the method comprises:
s21, if the first classification result sets are all non-empty sets, performing message digest calculation processing on the first data blocks according to a preset third message digest algorithm to correspondingly obtain third message digests;
s22, modifying the original digital television signal according to a preset data modification method to obtain modified data;
and S23, performing digital signal broadcasting processing to send the modified data, the plurality of first classification result sets and the plurality of third message digests to a digital television signal receiving end in a preset broadcasting network.
5. The method for sending digital television signals with improved information security according to claim 1, wherein after the step S5 of classifying the plurality of second data blocks by using the arrangement rule classification model to obtain a plurality of second classification result sets correspondingly, and determining whether the plurality of second classification result sets are all non-empty sets, the method comprises:
s51, if the plurality of second classification result sets are not uniformly non-empty sets, marking a second data block corresponding to a non-empty set in the second classification result set as a second confirmation data block, and performing message digest calculation processing on all the second confirmation data blocks according to a preset fourth message digest algorithm to obtain a plurality of fourth message digests correspondingly;
s52, according to a preset third data block splitting method, splitting second data blocks corresponding to the empty sets in the second classification result set respectively to obtain a plurality of third data blocks;
s53, classifying the third data blocks by adopting the arrangement rule classification model to correspondingly obtain a plurality of third classification result sets, and judging whether the third classification result sets are non-empty sets;
s54, if the third classification result sets are all non-empty sets, correspondingly marking the third data blocks as third confirmation data blocks, and respectively performing message digest calculation processing on the second confirmation data blocks according to a preset fifth message digest algorithm to correspondingly obtain fifth message digests;
s55, modifying the original digital television signal according to a preset data modification method to obtain modified data, and performing digital signal broadcasting processing to send the modified data, a plurality of first message digests, a plurality of first classification result sets, a plurality of fourth message digests, a plurality of second classification result sets, a plurality of fifth message digests, and a plurality of third classification result sets to a digital television signal receiving end in a preset broadcasting network.
6. The method for sending digital television signals with improved information security according to claim 1, wherein the modified data has the same length as the original digital television signals, and the step S7 of modifying the original digital television signals according to a preset data modification method to obtain modified data and performing digital signal broadcasting processing to send the modified data, the plurality of first message digests, the plurality of first classification result sets, the plurality of second message digests and the plurality of second classification result sets to a digital television signal receiving end in a preset broadcasting network comprises:
s701, performing partial character replacement processing on the original digital television signal to replace the No. 0 character at the designated position with the No. 1 character, or replace the No. 1 character at the designated position with the No. 0 character, so as to obtain first temporary data; wherein the number of the designated positions is not greater than 1% of the total number of characters of the original digital television signal;
s702, according to the first data block splitting method and the second data block splitting method, sequentially splitting the first temporary data to obtain a plurality of second temporary data blocks and a plurality of third temporary data blocks; the plurality of second temporary data blocks correspond to the plurality of first data blocks one to one, and the plurality of third temporary data blocks correspond to the plurality of second data blocks one to one;
s703, correspondingly calculating character difference percentages between the plurality of second temporary data blocks and the plurality of first data blocks to obtain a plurality of first character difference percentages;
s704, correspondingly calculating character difference percentages between the plurality of third temporary data blocks and the plurality of second data blocks to obtain a plurality of second character difference percentages;
s705, judging whether the difference percentages of the first characters and the second characters are not more than 1%;
and S706, if the difference percentages of the first characters and the second characters are not more than 1%, performing digital signal broadcasting processing to send the modified data, the first message digests, the first classification result sets, the second message digests and the second classification result sets to a digital television signal receiving end in a preset broadcasting network.
7. A digital television signal transmitting device for improving information security is applied to a digital television signal transmitting end, and comprises:
the system comprises a first data block splitting unit, a second data block splitting unit and a data processing unit, wherein the first data block splitting unit is used for calling an original digital television signal and splitting the original digital television signal according to a preset first data block splitting method to obtain a plurality of first data blocks;
a first classification result set obtaining unit, configured to perform classification processing on the plurality of first data blocks by using a preset arrangement rule classification model to obtain a plurality of first classification result sets correspondingly, and determine whether the plurality of first classification result sets are all non-empty sets; each first classification result set is an empty set or a non-empty set, and when the first classification result set is the non-empty set, at least one arrangement rule is included;
a first message digest calculation unit, configured to, if the plurality of first classification result sets are not uniformly non-empty sets, mark a first data block corresponding to a non-empty set in the first classification result set as a first acknowledgment data block, and perform message digest calculation processing on all the first acknowledgment data blocks according to a preset first message digest algorithm, so as to obtain a plurality of first message digests correspondingly;
a second data block splitting unit, configured to split, according to a preset second data block splitting method, first data blocks corresponding to empty sets in the first classification result set, respectively, so as to obtain multiple second data blocks;
a second classification result set obtaining unit, configured to use the arrangement rule classification model to classify the plurality of second data blocks so as to obtain a plurality of second classification result sets correspondingly, and determine whether each of the plurality of second classification result sets is a non-empty set;
the second type of message digest calculation unit is configured to, if the plurality of second classification result sets are all non-empty sets, correspondingly mark the plurality of second data blocks as a plurality of second acknowledgment data blocks, and perform message digest calculation processing on the plurality of second acknowledgment data blocks according to a preset second type of message digest algorithm to obtain a plurality of second message digests correspondingly;
and the digital signal sending unit is used for modifying the original digital television signal according to a preset data modification method to obtain modified data, and performing digital signal broadcasting processing to send the modified data, the plurality of first message digests, the plurality of first classification result sets, the plurality of second message digests and the plurality of second classification result sets to a digital television signal receiving end in a preset broadcasting network.
8. A computer device comprising a memory and a processor, the memory storing a computer program, wherein the processor implements the steps of the method of any one of claims 1 to 6 when executing the computer program.
9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 6.
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