CN110222142B

CN110222142B - Topic distribution method and device

Info

Publication number: CN110222142B
Application number: CN201910383387.6A
Authority: CN
Inventors: 张俊; 敖彬彬
Original assignee: Wangsu Science and Technology Co Ltd
Current assignee: Wangsu Science and Technology Co Ltd
Priority date: 2019-05-09
Filing date: 2019-05-09
Publication date: 2021-08-27
Anticipated expiration: 2039-05-09
Also published as: CN110222142A

Abstract

The invention discloses a topic distribution method and a topic distribution device, wherein the method comprises the following steps: receiving a target topic extraction instruction, wherein the target topic extraction instruction comprises a target topic number, and sending a target topic information ciphertext corresponding to the target topic number to an initiator of the target topic extraction instruction; after the target topic information ciphertext is decrypted to be a target topic information plaintext by the initiator, whether the target topic information plaintext is correct is judged through a broadcast directing station; and if the target title information plaintext is correct, receiving a target title distribution instruction issued by the director station, and distributing a target title problem ciphertext to a viewer end according to the target title distribution instruction. According to the technical scheme, the topic information can be encrypted, so that the problem information is prevented from being leaked before and in the distribution process.

Description

Topic distribution method and device

Technical Field

The invention relates to the technical field of Internet, in particular to a question distribution method and device.

Background

Along with the popularity of live broadcast answer, a plurality of live broadcast platforms release the activity of live broadcast answer, and the reward amount of the live broadcast answer activity is higher and higher, so that more users are attracted to participate in the answer activity, and various black industries are also activated in the live broadcast answer activity. In order to ensure that the competition is performed fairly, it is very important to ensure the safety of the question information, but when the live broadcast platform performs the live broadcast answer activity, the question information is mostly distributed in a plaintext form in the network, which easily causes the question information to be leaked in the distribution process, and cannot ensure the normal operation of the live broadcast answer activity.

Therefore, it is desirable to provide a new topic distribution method and apparatus to solve the above-mentioned disadvantages.

Disclosure of Invention

The application aims to provide a topic distribution method and device, which can avoid leakage of topic information before and during distribution.

In order to achieve the above object, the present application provides a topic distribution method in one aspect, where the method is applied to a live broadcast question answering system, where a topic information ciphertext for completing encryption is stored in the live broadcast question answering system, where the topic information ciphertext includes a topic question ciphertext, and the method includes: receiving a target topic extraction instruction, wherein the target topic extraction instruction comprises a target topic number, and sending a target topic information ciphertext corresponding to the target topic number to an initiator of the target topic extraction instruction; after the target topic information ciphertext is decrypted to be a target topic information plaintext by the initiator, whether the target topic information plaintext is correct is judged through a broadcast directing station; and if the target title information plaintext is correct, receiving a target title distribution instruction issued by the director station, and distributing a target title problem ciphertext to a viewer end according to the target title distribution instruction.

For realizing the above object, this application on the other hand still provides a topic distribution device, the device is applied to in the live broadcast answer system, the storage has the encrypted topic information ciphertext of completion in the live broadcast answer system, the topic information ciphertext includes the topic problem ciphertext, the device includes: the title extraction module is used for receiving a target title extraction instruction, wherein the target title extraction instruction comprises a target title number and sending a target title information ciphertext corresponding to the target title number to an initiator of the target title extraction instruction; and the title distribution module is used for receiving a target title distribution instruction issued by the director after the director judges that the decrypted target title information plaintext is correct, and distributing a target title problem ciphertext to the audience according to the target title distribution instruction.

Therefore, according to the technical scheme provided by the application, the live broadcast question answering system can encrypt the question information in advance, the question information ciphertext is stored in the question answering server, after the question answering server receives the target question extracting instruction, the corresponding target question information ciphertext can be sent to the initiator of the target question extracting instruction according to the target question number in the target question extracting instruction, and after the target question information ciphertext is decrypted into the target question information plaintext by the initiator, the target question information plaintext is sent to the program director, so that the program director judges whether the target question information plaintext is correct or not. If the director judges that the plaintext of the target question information is correct, the director issues a target question distribution instruction to the answer server so that the answer server distributes the target question ciphertext to the audience. Therefore, in the live broadcast answering process, the question management and answering activities are separated, and the question information is distributed in a network in a ciphertext mode, so that the safety of the question information can be ensured, and the normal operation of the live broadcast answering activity can be ensured.

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 creative efforts.

FIG. 1 is a schematic illustration of the encryption principle in an embodiment of the present invention;

FIG. 2 is a flowchart of a topic distribution method in an embodiment of the present invention;

FIG. 3 is a schematic diagram of a topic distribution process in an embodiment of the present invention;

FIG. 4 is a functional block diagram of a topic distribution apparatus according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of a topic distribution apparatus according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

To facilitate understanding of the title encryption referred to in this application, the encryption principle is briefly described below, and referring to fig. 1, the information encryption technology can be divided into three categories: symmetric encryption, asymmetric encryption, and one-way hash encryption.

Symmetric encryption refers to encryption and decryption using the same key (or may be derived from each other). Symmetric encryption is generally used in situations where information needs to be exchanged or stored securely, such as Cookie encryption, communication encryption, etc., and commonly used symmetric encryption algorithms include DES algorithm, RC algorithm, etc. The symmetric encryption has the advantages of simple algorithm, high encryption and decryption efficiency and low system overhead, and is suitable for encrypting a large amount of data; the disadvantage is that the same key is used for encryption and decryption, and the problem of how to exchange the key safely needs to be faced, if the key is lost, all encrypted information can be easily cracked, taking the DES algorithm as an example, the generated key is only 56 bits, the confidentiality strength is not high, and in addition, as the DES algorithm is completely open, the safety of the DES algorithm completely depends on the protection of the key, and a reliable channel is necessary for distributing the key.

Asymmetric encryption means that encryption and decryption use different keys, one of which is open to the outside world and called a public key, and the other of which is known only to the owner and called a private key. Information encrypted with a public key must be decrypted with a private key, whereas information encrypted with a private key must be decrypted with a public key. The asymmetric encryption technology is generally used in occasions of information security transmission, digital signature and the like, and the commonly used algorithms include an RSA algorithm and the like. The asymmetric encryption has the advantages that the key distribution is convenient; the defects are that the encryption and decryption processes are large in calculation amount and low in encryption and decryption speed. In order to reduce the amount of calculation, a combination of a symmetric encryption method and an asymmetric encryption method is often used when transmitting information, that is, the information is encrypted by a DES session key, then the session key and the information digest are encrypted by using an RSA key, and after receiving the information, the opposite party decrypts the session key by using different keys and checks the information digest. Therefore, the DES is used for plaintext encryption, the RSA is used for encryption of the DES key, the DES encryption speed is high, the method is suitable for encrypting longer messages, and the RSA can solve the problem of DES key distribution.

The one-way hash encryption is to obtain output information of a fixed length by performing hash calculation on information of an arbitrary input length, and common one-way hash algorithms include MD5, SHA, and the like. By using the characteristic of one-way hash encryption, input information with any size can be encrypted and stored. Taking the example of encrypting and storing the password, the password input by the user during registration is not directly stored in the database, but is subjected to one-way hash encryption, the generated ciphertext is stored in the database, when the user logs in again, the input information is subjected to password verification, the information input by the user is subjected to the same hash calculation to obtain the ciphertext of the input information, the ciphertext of the input information is compared with the ciphertext stored in the database, and if the ciphertext of the input information is consistent with the ciphertext stored in the database, the password verification is successful. One-way hash encryption has the advantage that the hash calculation process is irreversible, i.e. it is not possible to obtain input information by calculating output information of fixed length; the method has the advantages that the same input information can be generated by the same encryption algorithm, and people can crack the input information by using a table look-up method, a reverse table look-up method and an attack mode of a rainbow table.

To increase the security of the one-way hash computation, a salt value may be used in the hash algorithm, which salt value corresponds to the encrypted key. Taking MD5 as an example, MD5 belongs to a Hash algorithm, the algorithm can run on numerical values with any length to generate a 128-bit Hash value (Hash value), MD5 is irreversible, but the Hash values generated by the same input information are the same, so that people can utilize the leaked password database to perform anti-query, salt values can be used to further improve the safety of MD5 aiming at the defects, the salt values are a group of randomly generated character strings and can comprise random upper and lower case letters, numbers and characters, the number of bits can be different according to requirements, the same input information can finally generate different output information after the salt values are used, and thus, the standard password library does not exist, and the difficulty of people in cracking the input information is greatly increased. Of course, the above introduction of the salt value into the MD5 algorithm is only one application example in the present embodiment, and in practical application, the salt value can be applied to other algorithms as well.

Compared with a common video live broadcast system, the live broadcast answering system is additionally provided with a guide station and an answering server, the guide station sends a relevant answering instruction according to the live broadcast scene of a main broadcast end, the answering server distributes questions to audience ends participating in answering activities, answer results are collected after the audience ends finish answering the questions, and the answering server compares correct answers of the questions with the collected answer results to judge whether the audience ends answer correctly or not and sends statistical audience end answering conditions to the main broadcast end. In the application, in order to ensure that the answer server can distribute the question information in time and collect the answer result, the question related information and the live broadcast video stream in the live broadcast answer activity are separately transmitted, the answer server transmits the question related information by using an instant messaging protocol, and the main broadcast end pushes the live broadcast video stream by using a traditional live broadcast video protocol (including but not limited to RTMP, HDL and HLS protocols).

The title distribution method is applied to a live broadcast answer system, and a title information ciphertext subjected to encryption is stored in the live broadcast answer system.

Before the live broadcast answer activity starts, an encryption server in the live broadcast platform can encrypt the plaintext of the question information by using one or more combination of symmetric encryption, asymmetric encryption and one-way hash encryption, and the like, and the encryption server is not limited in the application. The title information plaintext comprises title content, title options and correct answers to the titles. And after finishing the related encryption work, the live broadcast platform sends the generated title information ciphertext to an answer server, and the answer server stores the title information ciphertext. It should be particularly noted that the topic information ciphertext includes two parts, namely a topic question ciphertext and a topic answer ciphertext, where the topic question ciphertext may specifically include a topic content ciphertext and a topic option ciphertext. In the application, the answer server does not participate in the process of encrypting and decrypting the topic information, the live broadcast platform does not encrypt the topic number, but establishes the mapping relation between the topic number and the topic information ciphertext and sends the mapping relation to the answer server, so that the answer server can feed back the corresponding topic information ciphertext according to the topic number. It should be noted that, when the same information is encrypted for a plurality of times, if the same key and the same encryption algorithm are used in the encryption process, the generated ciphertext is the same. Since the title information generally only contains A, B, C, D four options in an actual live question answering activity, the expression form of correct answers to the questions is usually one letter in A, B, C, D, and the expression forms of correct answers to different questions may be the same, for example, all the answers are "a", which results in that if the live platform encrypts correct answers to different questions using the same key and the same encryption algorithm, the same title answer ciphertext may be generated, and in this case, the correspondence between the letters a, B, C, and D and the ciphertext may be determined by analyzing the title answer ciphertext and the published correct answers.

For example, the correct answer to the topic 1 and the correct answer to the topic 5 are both a, and the live broadcast platform encrypts the correct answer to the topic 1 and the correct answer to the topic 5 using the same key and the same encryption algorithm, so that it is obvious that ciphertext of the answers to the topics generated after two times of encryption is the same. Assuming that a ciphertext generated by encrypting the letter "A" is "& 5@ 3", people can determine that the ciphertext generated by encrypting the letter "A" through the key and the encryption algorithm is "& 5@ 3" by collecting the ciphertext "& 5@ 3" and a correct answer "A" published after answering, so that in the subsequent answering process, when a question answer ciphertext of a certain question is found to be "& 5@ 3", the correct answer of the question can be determined to be "A", which is obviously not beneficial to the confidentiality of the correct answer of the question.

In one embodiment, when the live platform encrypts the title information plaintext, a random number may be added to the correct answer to the title. For example, when the correct answer to the topic 1 and the correct answer to the topic 5 are both a, when the live platform encrypts the correct answer to the topic, a random number "451319 ah" may be added after the correct answer to the topic 1 (i.e., the letter "a"), and a random number "dgk 42 ui" may be added after the correct answer to the topic 5 (i.e., the letter "a"), so that the representation form of the correct answer to the topic 1 becomes "a 451319 ah", and the representation form of the correct answer to the topic 5 becomes "Adgk 42 ui", and it is obvious that even though the live platform encrypts the "a 451319 ah" and the "Adgk 42 ui" using the same key and the same encryption algorithm, the generated ciphertexts are also different, so that the duplication of the ciphertexts of the answers to the topics is avoided, and the confidentiality of the correct answers to the topics is improved. Correspondingly, after the direct broadcast platform adds the random number to the correct answer of the title, the direct broadcast platform needs to establish a mapping relationship between the title number and the random number, so that the direct broadcast platform can send the corresponding random number to the decryption party according to the title number in the subsequent decryption process, and the decrypted title information plaintext can be correctly interpreted.

It should be noted that the random number may be a group of randomly generated character strings, including but not limited to upper and lower case letters, numbers and characters, and the random number may be added before the correct answer to the title or after the correct answer to the title.

In another embodiment, when the live platform encrypts the title information plaintext, different keys can be used for different titles, which can also prevent the ciphertext of the title answer from being repeated, thereby improving the confidentiality of the correct answer to the title. Correspondingly, after the live broadcast platform uses different keys for different titles, the live broadcast platform also needs to establish a mapping relationship between title numbers and the keys, so that the live broadcast platform can send corresponding keys to a decryption party according to the title numbers in a subsequent decryption process, and a title information ciphertext can be correctly decrypted.

Referring to fig. 2 and 3, a title distribution method provided by the present application may include the following steps.

S101: receiving a target topic extraction instruction, wherein the target topic extraction instruction comprises a target topic number, and sending a target topic information ciphertext corresponding to the target topic number to an initiator of the target topic extraction instruction.

In this embodiment, after the live question answering activity starts, the answer server receives a target question extraction instruction, where the target question extraction instruction includes a target question number, and the answer server searches for a corresponding target question information ciphertext according to the target question number and sends the target question information ciphertext to an initiator of the target question extraction instruction. It should be noted that the target topic information ciphertext includes a target topic question ciphertext and a target topic answer ciphertext.

S102: and after the target topic information ciphertext is decrypted into a target topic information plaintext by the initiator, judging whether the target topic information plaintext is correct or not by the director station.

In this embodiment, after receiving a target topic information ciphertext sent by an answer server, an initiator of a target topic extraction instruction may decrypt the target topic information ciphertext into a target topic information plaintext according to a preset decryption algorithm, and send the target topic information plaintext to a program director, where the target topic information plaintext includes the target topic problem plaintext and the target topic answer plaintext. The program director stores standard plaintext information of all questions in the live broadcast answering activity, wherein the standard plaintext information comprises question numbers, question contents, question options and question answers. After receiving the decrypted target title information plaintext, the director can compare the target title information plaintext with stored standard plaintext information to determine whether the target title information plaintext is correct.

It should be particularly noted that the preset decryption algorithm is set according to an encryption algorithm adopted by an encryption server in the live broadcast platform, and the preset decryption algorithm can ensure that an initiator of the target topic extraction instruction can correctly decrypt the target topic information ciphertext. For example, when the live platform encrypts the title information plaintext by using the DES encryption algorithm, since the DES encryption algorithm is symmetric, that is, the same key is used for encryption operation and decryption operation, and a sender of information and a receiver of information must share the key when transmitting and processing the information, the live platform can store the key in advance in an initiator of the target title extraction instruction, or the initiator of the target title extraction instruction requests the live platform to return the key, so that the initiator of the target title extraction instruction can correctly decrypt the target title information ciphertext. S103: and if the target title information plaintext is correct, receiving a target title distribution instruction issued by the director station, and distributing a target title problem ciphertext to a viewer end according to the target title distribution instruction.

And when the director judges that the plaintext of the target question information is correct through comparison, the director sends a target question distribution instruction to an answer server, and the answer server sends a target question ciphertext part in the ciphertext of the target question information to all audience terminals participating in the live broadcast answer activity of the field according to the target question distribution instruction. After receiving the target topic problem ciphertext, the audience terminal decrypts the target topic problem ciphertext into a target topic problem plaintext according to a preset decryption algorithm, and stores the target topic problem plaintext on local terminal equipment, wherein the target topic problem plaintext comprises a target topic content plaintext and a target topic option plaintext.

It should be noted that the live broadcast platform may actively send the key to the audience when the audience enters the live broadcast room, or send the key to the audience after the audience confirms to join the current answering activity, and the application does not limit the distribution mode of the key.

In practical applications, there may be situations where the target topic is wrong, for example, the topic content does not match the topic option due to human errors in the topic entry process, or the topic answer is lacking. At the moment, the director can judge that the target title information is incorrect in plaintext, the director can eliminate the wrong target title and start the alternative title to ensure the normal operation of the live broadcast answering activity. It should be particularly noted that, in order to ensure that the live broadcast answering activity is normally performed, the number of questions prepared by the live broadcast platform for the live broadcast answering activity is greater than the number of actually required questions, for example, 10 questions are set in the live broadcast answering activity and need to be answered, and 15 questions can be prepared by the live broadcast platform, so that when an error question appears, an alternative question can be started.

In one embodiment, after the director determines that the plaintext of the target topic information is incorrect, the director feeds back a target topic error message to an initiator of the target topic extraction instruction, so that the initiator of the target topic extraction instruction can send an alternative topic extraction instruction to the answer server, and after receiving the alternative topic extraction instruction, the answer server sends an alternative topic information ciphertext corresponding to the alternative topic number to the initiator of the alternative topic extraction instruction (i.e., the initiator of the target topic extraction instruction) according to the alternative topic number in the alternative topic extraction instruction. After the alternative topic information ciphertext is decrypted into an alternative topic information plaintext by an initiator of an alternative topic extraction instruction, whether the alternative topic information plaintext is correct is judged through a broadcasting guide platform, if the alternative topic information plaintext is judged to be correct by the broadcasting guide platform, the broadcasting guide platform sends an alternative topic distribution instruction to an answer server, and the answer server sends the alternative topic problem ciphertext to all audience terminals participating in the local live broadcast answer activity according to the alternative topic distribution instruction.

In practical application, the questions in the live question answering activity are distributed successively according to a preset sequence, so that after the director feeds back a target question error message to the initiator of the target question extraction instruction, the initiator of the target question extraction instruction can also directly send an instruction for extracting the next question to the answer server, and the application does not limit the instruction.

In one embodiment, the initiator of the target topic extraction instruction can be the anchor side. The method comprises the steps that a main broadcasting end sends a target question extracting instruction to an answer server, after the answer server receives the target question extracting instruction, the answer server sends a corresponding target question information ciphertext to the main broadcasting end according to a target question number in the target question extracting instruction, the main broadcasting end decrypts the target question information ciphertext into a target question information plaintext according to a preset decryption algorithm and displays the target question information plaintext on terminal equipment where the main broadcasting end is located, the main broadcasting end simultaneously forwards the target question information plaintext to a broadcasting guide table, and the broadcasting guide table compares the received target question information plaintext with stored standard plaintext information to judge whether the target question information plaintext is correct. If the director judges that the plaintext of the target question information is correct, the director sends a target question distribution instruction to an answer server, and the answer server sends target question ciphertext to all audience terminals participating in the live broadcast answer activity according to the target question distribution instruction.

Correspondingly, when the director judges that the target title information plaintext is incorrect, the director feeds back a target title error message to the anchor terminal, the anchor terminal sends an alternative title extraction instruction to the answer server, and the answer server sends a corresponding alternative title information ciphertext to the anchor terminal according to the alternative title number in the alternative title extraction instruction after receiving the alternative title extraction instruction. After the alternative topic information ciphertext is decrypted into an alternative topic information plaintext by the anchor terminal, the alternative topic information plaintext is displayed on the terminal equipment where the anchor terminal is located, and the anchor terminal simultaneously forwards the target topic information plaintext to the director station, so that the director station can judge whether the alternative topic information plaintext is correct. If the guide broadcasting station judges that the plaintext of the alternative question information is correct, the guide broadcasting station sends an alternative question distribution instruction to an answer server, and the answer server sends an alternative question cipher text to all audience terminals participating in the live broadcast answer activity according to the alternative question distribution instruction.

In another embodiment, the originator of the target topic extraction instruction can also be a director. The method comprises the steps that a broadcasting guide platform sends a target question extracting instruction to an answer server, after the answer server receives the target question extracting instruction, the answer server sends a corresponding target question information ciphertext to the broadcasting guide platform according to a target question number in the target question extracting instruction, the broadcasting guide platform decrypts the target question information ciphertext into a target question information plaintext according to a preset decryption algorithm, and compares the target question information plaintext with stored standard plaintext information to judge whether the target question information plaintext is correct. If the director judges that the plaintext of the target question information is correct, the director sends a target question distribution instruction to an answer server, and the answer server sends target question ciphertext to all audience terminals participating in the live broadcast answer activity according to the target question distribution instruction. It should be noted that, in the live question answering activity, the host needs to read the questions of the audience in the live broadcasting process, so the target question information plaintext needs to be displayed on the terminal device where the anchor terminal is located.

Correspondingly, when the program director judges that the target title information plaintext is incorrect, the program director sends an alternative title extraction instruction to the answer server, and after the answer server receives the alternative title extraction instruction, the program director sends a corresponding alternative title information ciphertext to the program director according to the alternative title number in the alternative title extraction instruction. And the director platform decrypts the alternative topic information ciphertext into an alternative topic information plaintext according to a preset decryption algorithm, and compares the alternative topic information plaintext with stored standard plaintext information to judge whether the alternative topic information plaintext is correct. When the director judges that the plaintext of the alternative question information is correct, the director forwards the plaintext of the alternative question information to a main broadcasting end so that the terminal equipment where the main broadcasting end is located can display the plaintext of the alternative question information, and simultaneously sends an alternative question distribution instruction to an answer server, and the answer server sends an alternative question cipher text to all audience ends participating in the live broadcast answer activity of the field according to the alternative question distribution instruction.

In one embodiment, after the live broadcast platform uses a one-way hash encryption method and encrypts the plaintext of the question information by using the salt value, the live broadcast platform sends the salt value to the answer server, so that the answer server stores the salt value. When the answer server receives a target question extraction instruction and sends a corresponding target question information ciphertext to an initiator of the target question extraction instruction according to a target question number in the target question extraction instruction, the answer server simultaneously sends the salt value to the initiator of the target question extraction instruction, and the initiator of the target question extraction instruction decrypts the received target question information ciphertext according to a preset decryption algorithm (namely, a one-way hash algorithm adopted by a live broadcast platform) and the received salt value.

Correspondingly, when the answer server sends the target question ciphertext to the audience terminal according to the received target question distribution instruction, the answer server simultaneously sends the salt value to the audience terminal, and the audience terminal decrypts the received target question ciphertext according to a preset decryption algorithm (namely, a one-way hash algorithm adopted by a live broadcast platform) and the received salt value.

It should be particularly noted that the live broadcast platform may encrypt all subject information cleartexts by using the same salinity, and may also encrypt different subject information cleartexts by using different salinity, which is not limited in the present application. When the live broadcast platform encrypts different title information plaintexts by using different salinity values, the mapping relation between the title number and the salinity value can be maintained through the answer server, and when the answer server sends a target title information ciphertext to the initiator of the target title extraction instruction according to the target title number and sends the target title problem ciphertext to the audience, the answer server simultaneously sends the salinity value corresponding to the target title number to the initiator of the target title extraction instruction and the audience, so that the initiator of the target title extraction instruction and the audience can correctly decrypt the received ciphertext.

In one embodiment, when the initiator of the target topic extraction instruction is the anchor terminal, the answer server sends the salt value to the anchor terminal, so that the anchor terminal can decrypt the target topic information ciphertext based on the salt value.

In another embodiment, when the initiator of the target topic extraction instruction is a program director, the answer server will send the salt value to the program director, so that the program director can decrypt the target topic information ciphertext based on the salt value. In the present application, since the title related information and the live video stream are separately transmitted, it is necessary to consider the problem of time synchronization of the title related information and the live video stream.

In practical application, the director sends a target topic distribution instruction to the answering server according to a topic sending signal of the anchor terminal. For example, the initiator of the target question fetching instruction is assumed to be the anchor terminal, after the live broadcast answer activity starts, the anchor terminal performs live broadcast interaction with the audience terminal, at the same time, the anchor terminal sends a target question extraction instruction to the answer server, the answer server responds to the target question extraction instruction and sends a corresponding target question information ciphertext to the anchor terminal, the anchor terminal decrypts the target question information ciphertext and displays the decrypted target question information plaintext on the terminal equipment where the anchor terminal is located, at the same time, the anchor terminal forwards the target question information plaintext to the director station, the director station compares the target question information plaintext with the stored standard plaintext information, if the director station judges that the target question information plaintext is correct, the director station informs the anchor terminal that the viewer terminal can read questions to the audience terminal and waits for the question signal sent by the anchor terminal, when the director terminal says "please listen to the questions" (i.e. the moment that the anchor terminal proposes the questions), the director can send a target topic distribution instruction to the answer server through a topic distribution API (application programming interface) provided by the live broadcast platform, and meanwhile, the director can add a Time value at the moment into the target topic distribution instruction as a topic distribution timestamp, the Time value can adopt local Time of the terminal device where the director is located, and the local Time of the terminal device can perform clock synchronization through NTP (Network Time Protocol).

It is specifically noted that an API, also known as an application programming interface, is a set of standards and specifications for accessing Internet-based services or applications, and is used to specify the manner of communication between various software components. In one embodiment, after receiving a question signal from a main broadcasting end, a director can immediately call an http interface provided by a live broadcasting platform to send a target question distribution instruction to an answer server.

Specifically, in an application example, the http interface called by the director can be https:// www.domain.com/exam/dispatch quest/events/{ eventId }/queries/{ sn }, wherein eventId is a live field number and sn is a topic number, and the application does not limit the interface type of the topic distribution API.

And after receiving the target question distribution instruction, the answer server immediately sends a target question cipher text to the audience, and adds the question-sending timestamp into the target question cipher text. The topic related information is transmitted through the instant messaging protocol, so that the transmission delay of the topic related information can be ignored, the time when the audience terminal receives the target topic problem ciphertext and the time when the director station sends the target topic distribution instruction can be considered to be the same, and the time value represented by the topic sending timestamp is the time when the audience terminal receives the target topic problem ciphertext. And after receiving the target topic problem ciphertext, the audience terminal decrypts the target topic problem ciphertext into a target topic problem plaintext according to a preset decryption algorithm and stores the target topic problem plaintext on local terminal equipment, wherein the target topic problem plaintext comprises the topic issuing timestamp.

In practical application, a live video needs to be encoded at a main broadcasting end and decoded at a spectator end, and meanwhile, network transmission has delay, so that a live video stream usually arrives at the spectator end later than a target topic problem ciphertext, and a time interval exists between the arrival time of the live video stream and the time value represented by the topic issue timestamp. In order to ensure that a viewer can just display a target topic problem plaintext at a moment when the broadcaster proposes a problem (i.e., a time value represented by a topic timestamp) when playing a live video stream pushed by the broadcaster, time synchronization needs to be performed on the live video stream and the target topic problem plaintext.

In an embodiment, a live time stamp may be added to a live video stream, for example, the live time stamp may be added to an SEI field of the live video stream, the live time stamp may be local time of a terminal device where a main broadcast end is located, and the local time of the terminal device may perform clock synchronization through an NTP. When the live broadcast time stamp is larger than or equal to the question sending time stamp, the target question plaintext can be displayed in a live broadcast picture displayed by the terminal equipment of the audience terminal, so that the target question plaintext can be displayed at the moment when a main broadcast terminal proposes a question.

And the audience end answers the displayed target question plaintext and sends the answering result to the answering server. The answer server only stores the target question answer ciphertext, so that the answer server cannot directly judge whether the answer result is correct or not, the answer server sends an answer decryption request of the target question ciphertext to the guide station, and the guide station sends the target question answer plaintext in the target question information plaintext to the answer server after receiving the request.

It should be particularly noted that the program director can also actively send the target question answer plaintext to the answer server according to a preset time interval, for example, the answer time set by the live question answering activity is 10 seconds, and after the program director sends the target question distribution instruction to the answer server, the program director automatically sends the target question answer plaintext to the answer server at an interval of 10 seconds.

The answer server compares the answer result with the target question answer plaintext, and if the answer result is consistent with the target question answer plaintext, the answer server judges that the answer of the audience terminal is correct; and if the answer result is inconsistent with the plaintext of the target question answer, judging that the answer of the audience terminal is wrong. Meanwhile, the answer server also counts the answer statistical information of the audience, wherein the answer statistical information includes but is not limited to the number of correct answer people, the ID of correct answer audience, the number of wrong answer people, the ID of wrong answer audience, the number of people using the revival card, the ID of the audience using the revival card, the number of no answer response people and the ID of no answer response audience.

After the answer server completes the statistics of the answer statistical information, the answer statistical information can be sent to the broadcasting guide and the anchor terminal, so that the broadcasting guide and the anchor terminal can acquire the answer condition of the target question. The answering server can also send the target question answer plaintext and the answer statistical information to all audience terminals participating in the live broadcast answering activity according to the target question comprehensive information distribution instruction fed back by the program director. And the audience terminal displays the correct answer of the target question and the related customs information of the target question on the terminal equipment according to the received target question answer plaintext and the answer statistical information.

It should be noted that the program director may also actively send the target question answer plaintext and the answer statistical information to all audience participating in the live broadcast answer activity after the answer statistical information is collected by the answer server without sending the target question comprehensive information distribution instruction to the answer server.

In one embodiment, when the answer server sends the target question answer plaintext and the answer statistical information to all audience participating in the live answer activity, the answer server may further add a statistical information issuing timestamp to the answer statistical information. After the audience acquires the live video stream, the live timestamp carried in the live video stream can be analyzed, the sizes of the statistical information release timestamp and the live timestamp are compared, and when the live timestamp is larger than or equal to the statistical information release timestamp, the answer statistical information can be displayed in a live picture displayed by the audience terminal equipment.

In one embodiment, if the topic information includes a picture or a video, the encrypted topic information ciphertext has a large data volume, and it is not suitable to continue to use the instant messaging channel to distribute the topic information ciphertext, in which case, a CDN (Content Delivery Network) may be used to distribute the topic information ciphertext. For example, the answer server may push all topic information ciphertexts in the local activity to the CDN network before the local live answer activity starts, the CDN network caches the topic information ciphertexts on an edge node server, and correspondingly, the edge node server also caches a mapping relationship between a topic number and a topic information cipher text, and when the answer server receives a target topic distribution instruction sent by the director, the answer server forwards the target topic distribution instruction to the CDN network, and the edge node server in the network sends the target topic information cipher text to the audience according to the target topic number in the target topic distribution instruction. It should be noted that the plain text of the answer to the question and the answer statistical information can also be distributed by using the CDN network.

In practical application, information such as question distribution records, question answer plaintext distribution records, answer statistical information and clearance information notifications can be stored in an application background of a live broadcast platform, so that related information can be called for data analysis at a later stage.

Referring to fig. 4, the present application further provides a topic distribution device, where the device is applied to a live broadcast question answering system, where a topic information ciphertext that completes encryption is stored in the live broadcast question answering system, where the topic information ciphertext includes a topic question ciphertext, and the device includes:

the title extraction module is used for receiving a target title extraction instruction, wherein the target title extraction instruction comprises a target title number and sending a target title information ciphertext corresponding to the target title number to an initiator of the target title extraction instruction;

and the title distribution module is used for receiving a target title distribution instruction issued by the director after the director judges that the decrypted target title information plaintext is correct, and distributing a target title problem ciphertext to the audience according to the target title distribution instruction.

In one embodiment, the apparatus further comprises:

a salt value distribution module, configured to obtain a salt value used by the target topic information ciphertext in encryption, and send the salt value to the initiator according to the target topic extraction instruction, so that the initiator decrypts the target topic information ciphertext based on the salt value;

and sending the salt value to the audience terminal according to the target topic distribution instruction, so that the audience terminal decrypts the target topic problem ciphertext based on the salt value.

In one embodiment, the apparatus further comprises:

the time stamp injection module is used for adding a question-issuing time stamp into the target question cipher text when the target question cipher text is distributed to the audience, and adding a statistical information issuing time stamp into the answer statistical information when the answer statistical information is distributed to the audience;

if the live broadcast time stamp carried by the live broadcast video stream received by the audience terminal is larger than or equal to the question issuing time stamp, the target question plaintext is displayed in a live broadcast picture displayed by the audience terminal, and if the live broadcast time stamp carried by the live broadcast video stream received by the audience terminal is larger than or equal to the statistical information issuing time stamp, the answer statistical information is displayed in the live broadcast picture displayed by the audience terminal.

In one embodiment, the apparatus further comprises:

the answer processing module is used for receiving the answer result sent by the audience terminal, sending an answer decryption request of the target question ciphertext to the broadcasting station and receiving a target question answer plaintext fed back by the broadcasting station;

and the statistical information processing module is used for comparing the answer result with the target question answer plaintext, generating the answer statistical information of the audience terminal according to the comparison result, and distributing the target question answer plaintext and the answer statistical information to the audience terminal according to the target question comprehensive information distribution instruction fed back by the program director.

In one embodiment, the topic extraction module is further configured to receive an alternative topic extraction instruction, where the alternative topic extraction instruction includes an alternative topic number, and send an alternative topic information ciphertext corresponding to the alternative topic number to an initiator of the alternative topic extraction instruction; the title distribution module is further configured to receive an alternative title distribution instruction issued by the director after the director judges that the decrypted alternative title information is correct in plaintext, and distribute an alternative title problem ciphertext to the audience according to the alternative title distribution instruction.

Referring to fig. 5, the present application further provides a topic distribution apparatus, which includes a memory and a processor, wherein the memory is used for storing a computer program, and when the computer program is executed by the processor, the topic distribution method as described above can be implemented. Specifically, at a hardware level, the title distribution apparatus may include a processor, an internal bus, and a memory. The memory may include memory as well as non-volatile memory. The processor reads the corresponding computer program from the non-volatile memory into the memory and then runs. It will be understood by those skilled in the art that the structure shown in fig. 5 is merely illustrative and not limiting to the structure of the above-described identification device. For example, the title distribution device may further include more or fewer components than those shown in fig. 5, and may further include other processing hardware, such as a GPU (graphics processing Unit), an external communication port, or the like. Of course, this application does not exclude other implementations than a software implementation, such as a logic device or a combination of software and hardware, etc.

In this embodiment, the processor may include a Central Processing Unit (CPU) or a Graphics Processing Unit (GPU), and may also include other single-chip microcomputers, logic gates, integrated circuits, and the like with logic processing capability, or a suitable combination thereof. The memory according to this embodiment may be a storage device for storing information. In a digital system, the device capable of storing binary data may be a memory; in an integrated circuit, a circuit without an actual form and with a storage function can also be a memory, such as a RAM, a FIFO and the like; in the system, the storage device in physical form may also be called a memory or the like. When the method is implemented, the memory can also be implemented in a cloud memory mode, and a specific implementation mode is not limited in this specification.

It should be noted that, the specific implementation of the topic distribution device in this specification may refer to the description of the method implementation, and is not described in detail here.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A question distribution method is applied to a live broadcast answer system, an encrypted question information ciphertext which is encrypted by an encryption server according to an encryption algorithm and a salt value is stored in the live broadcast answer system, the question information ciphertext comprises a question problem ciphertext, and the method comprises the following steps:

receiving a target topic extraction instruction, wherein the target topic extraction instruction comprises a target topic number, and sending a target topic information ciphertext corresponding to the target topic number to an initiator of the target topic extraction instruction;

after the target topic information ciphertext is decrypted to be a target topic information plaintext by the initiator, whether the target topic information plaintext is correct is judged through a broadcast directing station;

and if the plaintext of the target title information is correct, receiving a target title distribution instruction issued by the director station, and distributing a target title problem ciphertext to a viewer end according to the target title distribution instruction, wherein the target title distribution instruction is issued by the director station according to a title signal of the initiator.

2. The method of claim 1,

if the initiator is a main broadcasting terminal, after the target title information ciphertext is decrypted into a target title information plaintext by the main broadcasting terminal, the target title information plaintext is forwarded to the broadcasting guide station by the main broadcasting terminal, and whether the target title information plaintext is correct is judged by the broadcasting guide station;

if the initiator is a program director, after the target title information ciphertext is decrypted into the target title information plaintext by the program director, judging whether the target title information plaintext is correct or not by the program director.

3. The method of claim 2, wherein if the originator is a director, the method further comprises:

and after the director station judges that the target title information plaintext is correct, the target title information plaintext is forwarded to a anchor terminal, so that the anchor terminal displays the target title information plaintext.

4. The method of claim 1, wherein if the originator is an anchor, the method further comprises:

obtaining a salt value used by the target topic information ciphertext in encryption, and sending the salt value to the anchor terminal according to the target topic extraction instruction, so that the anchor terminal decrypts the target topic information ciphertext based on the salt value;

5. The method of claim 1, wherein if the originator is a director, the method further comprises:

obtaining a salt value used by the target topic information ciphertext in encryption, and sending the salt value to the director according to the target topic extraction instruction, so that the director decrypts the target topic information ciphertext based on the salt value;

6. The method of claim 1, further comprising:

when a target question ciphertext is distributed to a viewer, adding a question distribution timestamp into the target question ciphertext;

and if the live broadcast timestamp carried by the live broadcast video stream received by the audience terminal is greater than or equal to the topic sending timestamp, displaying the target topic question plaintext in a live broadcast picture displayed to the audience terminal.

7. The method of claim 1, wherein the topic information ciphertext further comprises a topic answer ciphertext; accordingly, after the target topic question ciphertext is distributed to the audience, the method further comprises:

receiving an answer result sent by the audience terminal, sending an answer decryption request of the target question cipher text to the program director, and receiving a target question answer plaintext fed back by the program director;

and comparing the answer result with the target question answer plaintext, determining answer statistical information of the audience terminal according to the comparison result, and distributing the target question answer plaintext and the answer statistical information to the audience terminal according to a target question comprehensive information distribution instruction fed back by the program director.

8. The method of claim 7, further comprising:

when the target question answer plaintext and the answer statistical information are distributed to the audience, adding a statistical information issuing timestamp into the answer statistical information;

and if the live broadcast timestamp carried by the live broadcast video stream received by the audience terminal is greater than or equal to the statistical information release timestamp, displaying the answer statistical information in a live broadcast picture displayed by the audience terminal.

9. The method of claim 1, wherein if the director station determines that the target title information is not in the clear text, the method further comprises:

receiving an alternative topic extraction instruction, wherein the alternative topic extraction instruction comprises an alternative topic number, and sending an alternative topic information ciphertext corresponding to the alternative topic number to an initiator of the alternative topic extraction instruction;

after the alternative topic information ciphertext is decrypted into an alternative topic information plaintext by the initiator, whether the alternative topic information plaintext is correct is judged through a director station;

and if the plaintext of the alternative topic information is correct, receiving an alternative topic distribution instruction issued by the director station, and distributing an alternative topic problem ciphertext to the audience according to the alternative topic distribution instruction.

10. The title distribution device is applied to a live broadcast answer system, wherein an encrypted title information ciphertext completed by an encryption server according to an encryption algorithm and a salt value is stored in the live broadcast answer system, the title information ciphertext comprises a title problem ciphertext, and the device comprises:

and the title distribution module is used for receiving a target title distribution instruction issued by the director after the director judges that the decrypted target title information plaintext is correct, and distributing a target title problem ciphertext to a viewer end according to the target title distribution instruction, wherein the target title distribution instruction is issued by the director according to a title signal of the initiator.

11. The apparatus of claim 10, further comprising:

12. The apparatus of claim 10, further comprising:

13. The apparatus of claim 10, further comprising:

14. The apparatus of claim 10,

the title extraction module is further used for receiving an alternative title extraction instruction, wherein the alternative title extraction instruction comprises an alternative title number and sending an alternative title information ciphertext corresponding to the alternative title number to an initiator of the alternative title extraction instruction;

and the title distribution module is also used for receiving an alternative title distribution instruction sent by the director after the director judges that the decrypted alternative title information is correct in plaintext, and distributing an alternative title problem ciphertext to the audience according to the alternative title distribution instruction.

15. A topic distribution apparatus comprising a memory for storing a computer program and a processor, the computer program when executed by the processor implementing the method of any one of claims 1 to 9.