CN116015756A - Network multimedia secure transmission method and system - Google Patents

Abstract

The invention provides a network multimedia security transmission method and system. The network multimedia secure transmission method includes: a sending end and a receiving end; wherein, the encryption and decryption of multimedia data specifically includes setting multiple groups of key sets A and corresponding matching multiple groups of key sets A`, in the multimedia When adding a key on the data side, randomly assign the key a in one of the key sets A, and when decrypting, it needs to match a` in the key set A` to decode it, otherwise it cannot be decoded. The network multimedia secure transmission method and system provided by the present invention have the functions of dividing a network data into multiple terminals, and randomly assigning keys to each segment, when the randomly assigned keys of multiple segments match the matching keys of the receiving end, Only in this way can the security of the data be determined. When one of the sections is incorrect, it is judged as insecure. By assigning multiple sections and keys at random, the security of multimedia network data transmission is greatly improved.

Description

Method and system for secure network multimedia transmission

technical field

The invention relates to the field of secure network multimedia transmission, in particular to a method and system for secure network multimedia transmission.

Background technique

A multimedia system refers to a system that uses computer technology and digital communication network technology to process and control multimedia information. In a broad sense, a multimedia system is an integrated information system that integrates telephone, television, media, and computer networks.

With the development of multimedia coding, compression and transmission technology, multimedia technology has penetrated into all aspects of military, business and daily life. Its security issues have also attracted people's attention, especially in some sensitive occasions, which often have higher requirements for the security of multimedia information.

At present, in the transmission of network data, there is a certain encryption of network data, but the encryption method is basically based on the existing encryption protocol, which is relatively traditional and easy to be cracked.

Therefore, it is necessary to provide a network multimedia secure transmission method and system to solve the above technical problems.

Contents of the invention

The invention provides a network multimedia secure transmission method and system, which solves the problem that the network data encryption method is basically based on the existing encryption protocol, which is relatively traditional and easy to be cracked.

In order to solve the above-mentioned technical problems, the network multimedia secure transmission method provided by the present invention includes: a sending end and a receiving end;

Wherein, the sending end includes the following steps: S11: monitor the network data, and acquire the multimedia data after detecting the uploaded multimedia data;

S12: Divide the acquired multimedia data into multiple segments;

S13: Randomly add a key a to each piece of multimedia data;

S14: Encapsulate and send the encrypted multimedia data;

The receiver includes the following steps:

S21: monitor network data, and obtain multimedia data when it is detected that multimedia data is transmitted;

S22: Analyze the key a of the multimedia data, and match the key a` to the key a of each piece of multimedia data;

S23: Select to receive data or not to receive data according to the matching structure;

Among them, the encryption and decryption of multimedia data specifically includes setting multiple groups of key sets A and corresponding matching multiple groups of key sets A`, and randomly assigning one of the key sets A to the multimedia data terminal when adding a key. When the key a is decrypted, it needs to match a` in the key set A`, and then it can be decoded, otherwise it cannot be decoded.

The number of segments divided into the acquired multimedia data in S12 is randomly divided, and the number of segments is not less than three segments.

The key set A and the key set A' are not less than three sets.

In S23, one key a or multiple keys a may be added to each piece of multimedia data.

When more than one key a is added to each piece of multimedia data in S23, the multiple keys a may come from the same key set A or different key sets A.

The number of keys a added to each piece of multimedia data in S23 is randomly assigned.

The present invention also provides a network multimedia secure transmission system, including a sending encryption module and a receiving matching module, and the sending encryption module includes: a data monitoring module 1, a data acquisition module 1, a data segmentation module, a key segmentation additional module and Encapsulation and sending module, wherein, the data monitoring module one is used to monitor the network data, and detects whether there is uploaded multimedia data, the data acquisition module one is used to obtain the uploaded multimedia data, and the data segmentation module is used for The acquired multimedia data is segmented, the key segment addition module is used to add key a to each segment of multimedia data, and the encapsulation sending module is used to encapsulate the multimedia data with key a added and send;

The receiving matching module includes a data monitoring module 2, a data acquisition module 2, a data parsing module, a key matching module and a data processing module, the data monitoring module 2 is used to monitor the transmitted multimedia data, and the data acquisition module Module two acquires the multimedia data transmitted by the network, the data parsing module is used to analyze the segment number of the acquired multimedia data, and the key matching module is used to match the additional key a of the acquired multi-segment multimedia data corresponding to The key a', the data processing module chooses to receive multimedia data or close the transmission channel according to the result of key matching.

Preferably, the receiving matching module further includes a key analysis module, the key analysis module is used to analyze the key attached to each piece of multimedia data in the acquired multimedia data, which specifically includes the number of keys and the number of keys subordinate.

Preferably, when the key matching module detects that the obtained multimedia data key does not match the key part, the data processing module can choose to close the entire transmission channel or receive the part where the key matches the key correctly.

Preferably, the input end of the key analysis module is connected to the output end of the data analysis module, and the output end of the key analysis module is connected to the input end of the key matching module.

Preferably, the output end of the first data monitoring module is connected to the input end of the first data acquisition module, the output end of the first data acquisition module is connected to the input end of the data segmentation module, and the data segmentation The output end of the module is connected to the input end of the key segmentation additional module, and the output end of the key segmentation additional module is connected to the input end of the encapsulation transmission module;

The output end of the data monitoring module two is connected to the input end of the data acquisition module two, the output end of the data acquisition module two is connected to the input end of the data analysis module, and the output end of the key analysis module connected to the input end of the key matching module, and the output end of the key matching module is connected to the input end of the data processing module.

Compared with related technologies, the network multimedia secure transmission method and system provided by the present invention have the following beneficial effects:

The present invention provides a network multimedia secure transmission method and system, by dividing a network data into multiple terminals, and randomly assigning keys to each segment, when the randomly assigned keys of multiple segments are matched with the matching keys of the receiving end , in order to determine the security of the data. When one of the sections is wrong, it is judged as insecure. By assigning multiple sections and random keys, the security of multimedia network data transmission is greatly improved.

Description of drawings

Fig. 1 is the functional block diagram of the sending end of the network multimedia secure transmission method provided by the present invention;

Fig. 2 is the functional block diagram of the receiving end of the network multimedia secure transmission method provided by the present invention;

Fig. 3 is the functional block diagram of the network multimedia secure transmission system provided by the present invention;

Fig. 4 is the functional block diagram of the transmission encryption module of the network multimedia secure transmission system provided by the present invention;

Fig. 5 is the functional block diagram of the receiving matching module of the network multimedia secure transmission system provided by the present invention;

FIG. 6 is a schematic diagram of key-to-key matching in the network multimedia secure transmission system provided by the present invention.

Labels in the figure:

1. Send encryption module;

2. Receive matching module;

101. Data monitoring module one, 102. Data acquisition module one, 103. Data segmentation module, 104. Key segmentation additional module, 105. Packaging and sending module;

201. The second data monitoring module, 202. The second data acquisition module, 203. The data analysis module, 204. The key analysis module, 205. The key matching module, 206. The data processing module.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Please refer to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6 in combination, wherein Fig. 1 is a functional block diagram of the sending end of the network multimedia secure transmission method provided by the present invention; Fig. 2 is the network multimedia provided by the present invention The functional block diagram of the receiving end of secure transmission method; Fig. 3 is the functional block diagram of the network multimedia secure transmission system provided by the present invention; Fig. 4 is the functional block diagram of the sending encryption module of the network multimedia secure transmission system provided by the present invention; Fig. 5 is the functional block diagram of the present invention Provided is a functional block diagram of the receiving matching module of the network multimedia secure transmission system; FIG. 6 is a schematic diagram of key-to-key matching of the network multimedia secure transmission system provided by the present invention. A network multimedia secure transmission method, including: a sending end and a receiving end;

Wherein, the sending end includes the following steps: S11: monitor the network data, and acquire the multimedia data after detecting the uploaded multimedia data;

S12: Divide the acquired multimedia data into multiple segments;

S13: Randomly add a key a to each piece of multimedia data;

S14: Encapsulate and send the encrypted multimedia data;

The receiver includes the following steps:

S21: monitor network data, and obtain multimedia data when it is detected that multimedia data is transmitted;

S22: Analyze the key a of the multimedia data, and match the key a` to the key a of each piece of multimedia data;

S23: Select to receive data or not to receive data according to the matching structure;

Among them, the encryption and decryption of multimedia data specifically includes setting multiple groups of key sets A and corresponding matching multiple groups of key sets A`, and randomly assigning one of the key sets A to the multimedia data terminal when adding a key. When the key a is decrypted, it needs to match a` in the key set A`, and then it can be decoded, otherwise it cannot be decoded.

By dividing a network data into multiple terminals and randomly assigning keys to each segment, the security of the data can only be determined when the randomly assigned keys of multiple segments match the matching keys of the receiving end. When one of the segments is incorrect They are all judged as insecure, and multi-segment and randomly assigned keys can greatly improve the security of multimedia network data transmission.

As a preferred implementation manner in this embodiment, the number of segments divided into the acquired multimedia data in S12 is randomly divided, and the number of segments is not less than three segments.

Specifically, when sending a video, you can set marker points at any three time points of the video, and then assign key a to each marker point. Similarly, you can set marker points at any three time points of the audio , and assign myrrh a to each mark point. For text or picture files, you can choose to select the data size of the text file to segment. Segment settings flag for encryption.

When decrypting, authentication and decryption need to be performed segment by segment, that is, multi-layer encryption can also be realized.

Please refer to Fig. 6, the key set A and the key set A' are not less than three sets.

Each key set A and each key set A' include multiple one-to-one corresponding keys a and keys a'. By setting multiple groups, the randomness of key usage can be increased, thereby increasing the difficulty of cracking and improving the security of network transmission.

As a preferred implementation manner, in S23, one key a or multiple keys a may be added to each piece of multimedia data.

Multiple encryption keys are randomly set in each piece of multimedia data, thereby increasing the difficulty of cracking.

As a preferred implementation manner, when more than one key a is added to each piece of multimedia data in S23, the multiple keys a may come from the same key set A or different key sets A.

When assigning different key concentration keys to a certain multimedia data segment in a combined manner, the cracking algorithm is greatly increased, and it is randomly assigned. As shown in Figure 6, the combination of keys can be a11, a12 , a22 or a14, a35, a25 or a26, a34, a36 and other combinations, through random assignment, it is impossible to grasp the law of key assignment and improve the security of data transmission.

In one embodiment, the number of keys a added to each piece of multimedia data in S23 is randomly assigned.

Wherein the number of keys attached to the multimedia data of each segment is not limited to two, it can be three or more, wherein preferably 2-5, such as keys are a14a35, a26a25a22, etc., so as to be different numbers by random combination , thus greatly improving the difficulty of cracking and improving the security of multimedia data transmission.

The present invention also provides a network multimedia secure transmission system, including a sending encryption module 1 and a receiving matching module 2, and the sending encryption module 1 includes: a data monitoring module 101, a data acquisition module 102, a data segmentation module 103, an encryption Key segmentation additional module 104 and encapsulation sending module 105, wherein, the data monitoring module one 101 is used to monitor network data, detects whether there is uploaded multimedia data, and the data acquisition module one 102 is used to obtain uploaded multimedia data data, the data segmentation module 103 is used to segment the acquired multimedia data, the key segment addition module 4 is used to add a key a to the multimedia data of each segment, and the encapsulation sending module 105 It is used to encapsulate and send the multimedia data with key a attached;

The receiving matching module 2 includes a data listening module two 201, a data acquisition module two 202, a data parsing module 203, a key matching module 205 and a data processing module 206, and the data listening module two 201 is used for transmitting multimedia data Monitor, the data acquisition module 2 202 acquires the multimedia data transmitted by the network, the data analysis module 203 is used to analyze the segment number of the acquired multimedia data, and the key matching module 205 is used to obtain the multi-segment multimedia data The additional key a of the data matches the corresponding key a', and the data processing module 206 chooses to receive the multimedia data or close the transmission channel according to the key matching result.

Data acquisition module 1 101 distinguishes the type of multimedia data file when acquiring, judges whether it is a video file, sound file or text file, and performs different forms of segmentation according to the type of multimedia data.

Wherein, the data segmentation module 103 can divide the acquired multimedia data into random segments, not less than two.

After the receiving and matching module 2 acquires the multimedia data, the data parsing module 203 first decapsulates the multimedia data, then parses and confirms the number of divided segments, and confirms the position of the encryption key.

In key matching, the key corresponding to the parsed key is searched for the corresponding key in the key set for matching. When there is no match, it is determined that the transmitted multimedia file does not correspond and is considered to be an illegal file. When a part can be matched and analyzed , when some parts cannot be matched and parsed, it is considered that the file may be partially cracked.

The receiving matching module 2 also includes a key analysis module 204, and the key analysis module 204 is used to analyze the key attached to each piece of multimedia data in the acquired multimedia data, which specifically includes the number of keys and the number of keys subordinate.

By setting the key analysis module 204, the number of keys on each section of multimedia file after the data analysis module has been parsed and which key set each key comes from can be confirmed, so that the subsequent key matching module can directly correspond to the key set. Centralized search greatly improves the speed of key matching.

When the key matching module 205 detects that the acquired multimedia data key does not match the key section, the data processing module 206 can choose to close the entire transmission channel or receive the key matching the correct part.

Among them, you can choose to receive the part that matches the correct part, you can check the file that matches the correct part, and do not receive the information that does not match, so that you can confirm part of the received multimedia data information, and check the part of the transmitted data information master.

The input end of the key analysis module 204 is connected to the output end of the data analysis module 203 , and the output end of the key analysis module 204 is connected to the input end of the key matching module 205 .

After the data parsing module 203 parses the multimedia data, the key parsing module 204 next parses the key of each piece of multimedia data.

The above is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process conversion made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technologies fields, all of which are equally included in the scope of patent protection of the present invention.

Claims (10)

1. A network multimedia secure transmission method, comprising: a transmitting end and a receiving end;

wherein, the sending end comprises the following steps: s11: monitoring network data, and acquiring multimedia data after detecting the uploaded multimedia data;

s12: dividing the acquired multimedia data into a plurality of sections;

s13: randomly attaching a secret key a to each piece of multimedia data;

s14: packaging and transmitting the encrypted multimedia data;

the receiving end comprises the following steps:

s21: monitoring network data, and acquiring multimedia data when the transmission of the multimedia data is detected;

s22: resolving the key a of the multimedia data and matching the key a of each piece of the multimedia data with the key

a；

S23: selecting to receive data or not to receive data according to the matching structure;

the encryption and decryption of the multimedia data specifically comprises setting a plurality of key sets A and a plurality of corresponding matched key sets A ', when a key is added to the multimedia data end, randomly endowing a key a in one key set A, and when decryption, decoding can only be performed by corresponding to a ' in the corresponding matched key set A ', otherwise, decoding cannot be performed.

2. The network multimedia secure transmission method according to claim 1, wherein the number of segments of the acquired multimedia data divided in S12 is a random division, and the number of segments is not less than three.

3. The network multimedia secure transmission method according to claim 1, wherein the key set a and the key set a' are set to not less than three groups.

4. The method and system for securely transmitting network multimedia according to claim 1, wherein one key a or a plurality of keys a can be added to each piece of multimedia data in S23.

5. The method and system for securely transmitting network multimedia according to claim 3, wherein when more than one key a is added to each piece of multimedia data in S23, the plurality of keys a may be from the same key set a or different key sets a.

6. The method and system for securely transmitting network multimedia according to claim 3, wherein the number of the keys a added to each piece of multimedia data in S23 is randomly added.

7. A network multimedia secure transmission system for a network multimedia secure transmission method according to any one of claims 1 to 5, characterized by comprising a transmission encryption module and a reception matching module, the transmission encryption module comprising: the system comprises a data monitoring module I, a data acquisition module I, a data segmentation module I, a key segmentation additional module and a packaging and transmitting module, wherein the data monitoring module I is used for monitoring network data and detecting whether uploaded multimedia data exists, the data acquisition module I is used for acquiring the uploaded multimedia data, the data segmentation module is used for carrying out segmentation processing on the acquired multimedia data, the key segmentation additional module is used for carrying out additional key a on the multimedia data of each segment, and the packaging and transmitting module is used for packaging and transmitting the multimedia data with the additional key a;

the receiving and matching module comprises a data monitoring module II, a data acquisition module II, a data analysis module, a key matching module and a data processing module, wherein the data monitoring module II is used for monitoring the transmitted multimedia data, the data acquisition module II is used for acquiring the multimedia data transmitted by a network, the data analysis module is used for analyzing the number of segments of the acquired multimedia data, the key matching module is used for matching the additional key a of the acquired multi-segment multimedia data with the corresponding key a', and the data processing module selects to receive the multimedia data or close the transmission channel according to the key matching result.

8. The network multimedia secure transmission system of claim 7, wherein the receiving matching module further comprises a key parsing module for parsing the key attached to each piece of multimedia data in the acquired multimedia data, wherein the key parsing module specifically includes the number of keys and the dependence of the keys.

9. The network multimedia secure transmission system of claim 7, wherein the data processing module is operable to select to shut down the entire transmission channel or to receive the correct portion of the key matching the key when the key matching module detects that the acquired multimedia data key does not match the key portion segment.

10. The network multimedia secure transmission system of claim 8, wherein an input of the key parsing module is coupled to an output of the data parsing module, and an output of the key parsing module is coupled to an input of the key matching module.

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