CN106686407A - Automatic identification encryption and decryption method and system for video data transmission - Google Patents

Abstract

The invention discloses an automatic identification, encryption and decryption method for video data transmission. The steps of the method include: obtaining the transmission parameters of the video file to be transmitted, confirming the path of the video file to be transmitted and the current state S1 of the video file to be transmitted, according to The user encrypts or decrypts instructions, encrypts or decrypts the current video file to be transmitted S2, judges whether the encryption or decryption operation is successful, and returns the final operation status to the user to complete the automatic identification encryption operation S3. The technical solution of the present invention occupies a small data space, only about 30 KB, and can be called by a server or other related video playback software; by adopting a partial file encryption method, encryption or decryption can be quickly realized, and the encryption or decryption state can be set for the video file , and can judge the status of the video file at the same time.

Description

An automatic identification encryption and decryption method and system for video data transmission

technical field

The invention relates to the technical field of information encryption, in particular to an automatic identification encryption and decryption method and system for video data transmission.

Background technique

With the rapid development of science and technology, the dissemination of electronic data has been widely integrated into people's daily life, for example, electronic data such as video, audio and other data.

People can use communication devices to store electronic data. Some personal privacy information (for example, some photos, videos, mobile banking information) do not want to be easily accessed by others, and the information that does not want to be accessed by others can be encrypted. In related technologies, the encryption method is usually password encryption, and the encrypted password can be characters, numbers, or patterns; when accessing encrypted data, it is necessary to input the correct password.

Nowadays, commonly used video encryption and decryption tools are usually software tools for users to manually operate, and the main types are as follows:

1) The user needs to manually open the software and select the video file to be encrypted or decrypted, and then select the corresponding encryption or decryption operation;

2) The user needs to manually judge whether the video has been encrypted, such as trying to play the video file, if it cannot be played normally, the video file may be encrypted.

The encryption or decryption operation of conventional encryption and decryption software tools needs to be performed manually, which is not convenient for users to use, and the encryption and decryption process is slow. Encrypting all parts of the file is highly secure, but it takes up a lot of memory space, which is not conducive to file storage and transmission. And it cannot encrypt or decrypt the specified location, so it is not flexible to use.

Contents of the invention

In order to solve the above technical problems, the present invention adopts the following technical solutions

An automatic identification encryption and decryption method for video data transmission, the steps of the method include:

S1. Obtain the transmission parameters of the video file to be transmitted, confirm the path of the video file to be transmitted and the current state of the video file to be transmitted;

S2. Encrypt or decrypt the current video file to be transmitted according to the user's encryption or decryption instruction;

S3. Judging whether the encryption or decryption processing operation is successful, and returning the final operation status to the user to complete the automatic identification encryption operation.

Preferably, the current status of the video file to be transmitted includes three statuses: encrypted, decrypted and unprocessed.

Preferably, said step S2 includes:

S21. Initialize the maximum number of encryption or decryption operations maxCount, the current number of encryption or decryption operations count, and the initial state of the video encryption or decryption result;

S22. Pass the judgment condition: whether the encryption or decryption status is an operation failure state and the current encryption or decryption times count is less than the maximum number of attempts to encrypt or decrypt operations maxCount, determine whether it is possible to try to encrypt the video file to be transmitted; if the judgment condition is met, then execute Step S23, if the judgment condition is not met, then execute step S3;

S23, set the operation identification of encryption or decryption operation for the video file, and judge whether the operation identification setting is successful, if successful, then perform step S24, if failed, then try to add 1 to the count of times of encryption or decryption operations, and repeat steps S22 and S23 , until the identification is successful or the judgment condition of step S22 is not satisfied;

S24. Encrypt or decrypt the content at the specified location of the video file to be transmitted according to user requirements;

S25. Determine whether the encryption or decryption operation is successful. If successful, complete the encryption or decryption operation of the video file to be transmitted. If it fails, perform steps S22 to S25 until the operation succeeds or the judgment condition of step S22 is not satisfied.

Preferably, said S24 includes:

S241. Taking the header 1024 bytes of the video file to be transmitted as the object of encryption or decryption;

S242. Set the initial position as site=0;

S243, judging whether the encryption of the header 1024 bytes of the currently to-be-transmitted video file is completed, if not completed, then take out 16 bytes of data from the 1024 bytes, and encrypt the 16 bytes of data, if completed Encryption, take 16 bytes of data from 1024 bytes, and decrypt the 16 bytes of data;

S244. Write the encrypted or decrypted data into the site, and exit if the writing fails;

S245. Then take 16 bytes out of the 1024 bytes, that is, site=site+16, and repeat step S243 to step S245 until all the 1024 bytes of data are encrypted or decrypted.

Preferably, in the step S243, if the data reading fails or the encryption/decryption operation fails, exit directly.

Preferably, said step S3 includes:

S31. If the encryption or decryption operation is successful, return the operation success state;

S32. If the encryption or decryption operation fails, try to roll back to the state before the video file is encrypted or decrypted;

S33. If the rollback operation is successful, return the operation failure state, and if the rollback operation fails, return the unrecoverable state.

An automatic identification and encryption system for video data transmission, the system includes:

The file identification unit obtains the video file transmission request, confirms the path of the video file to be transmitted and the current state of the video file to be transmitted;

An encryption unit, which encrypts or decrypts the current video file to be transmitted according to user encryption or decryption instructions;

The state feedback unit judges whether the encryption or decryption processing operation is successful, and returns the final operation state to the user to complete the automatic identification encryption operation.

Preferably, the current status of the video file to be transmitted includes three statuses: encrypted, decrypted and unprocessed.

Preferably, the encryption unit includes:

The initialization module initializes the initial state of the maximum number of encryption or decryption operations maxCount, the current number of encryption or decryption operations count, and the video encryption or decryption results;

The first judging module, by judging conditions: whether the encryption or decryption state is an operation failure state and the current encryption or decryption times count is less than the maximum number of attempts to encrypt or decrypt operations maxCount, to determine whether to try to encrypt the video file to be transmitted; if the judging condition is met , the operation identification of the encryption or decryption operation is set for the video file, if the judgment condition is not satisfied, the operation state determined by the state feedback unit is returned to the user;

The operation identification setting module is used to set the operation identification of the encryption or decryption operation for the video file, and judge whether the operation identification setting is successful, if successful, perform the user-specified content encryption or decryption operation, and if it fails, try the encryption or decryption operation times count Add 1, and repeat the operations of the step first judging module and the operation identification setting module, until the identification succeeds or the judging condition of the first judging module is not met;

Specify the content processing module to encrypt or decrypt the content at the specified location of the video file to be transmitted according to user needs;

The second judgment module judges whether the encryption or decryption operation is successful. If successful, the encryption or decryption operation of the video file to be transmitted is completed. If it fails, the first judgment module, the operation identification setting module, the designated content processing module and the second judgment module are executed. The operation of the second judging module until the operation succeeds or the judging condition of the first judging module is not met.

Preferably, the state feedback unit includes:

The encryption result judging module, if the encryption or decryption operation is successful, then returns the operation success state, if the encryption or decryption operation fails, then tries to roll back to the state before the video file is encrypted or decrypted;

The rollback result judging module, if the rollback operation is successful, returns the operation failure state, and if the rollback operation fails, returns the unrecoverable state.

The beneficial effects of the present invention are as follows:

The technical solution of the present invention is operated by calling, rather than interface-based manual operation, which is convenient for system or program calling and execution. Increase the encryption or decryption status identification, which is convenient for the system or program to judge the file encryption or decryption status. Using this scheme to generate library files greatly reduces the storage space of the tool plug-in and greatly improves the speed of encryption and decryption.

Description of drawings

Below in conjunction with accompanying drawing, specific embodiment of the present invention is described in further detail;

Fig. 1 shows the schematic diagram of automatic identification encryption decryption method described in this scheme;

Fig. 2 shows a schematic diagram of the local loop encryption or decryption method described in this solution.

detailed description

In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

As shown in Figure 1, the present invention discloses a method for automatic identification encryption and decryption for video data transmission, the steps of the method include:

Step S1, obtain the transmission parameters of the video file to be transmitted, confirm the path of the video file to be transmitted and the current state of the video file to be transmitted; wherein, the current state of the video file to be transmitted includes: encrypted, decrypted and unprocessed state. Among them, two parameters need to be called in this step, the first parameter is the path of the video file to be encrypted, and the second parameter is an operation parameter, which is represented by the following code:

The number 0 represents decryption, pass this parameter, and the method will decrypt the video;

The number 1 represents encryption, pass this parameter, and the method will encrypt the video;

The number 2 means to get the status of the video file, pass this parameter, the method only checks the current status of the file, and will return three states, that is, the number 0 means that the file has not been processed; the number 1 means that the file has been encrypted; the number 2 means that the file has been decrypted.

Step S2, encrypt or decrypt the current video file to be transmitted according to the user's encryption or decryption instruction. This step S2 includes:

S21. Initialize the maximum number of encryption or decryption operations maxCount, the current number of encryption or decryption operations count, and the initial state of the video encryption or decryption result;

S22. Pass the judgment condition: whether the encryption or decryption status is an operation failure state and the current encryption or decryption times count is less than the maximum number of attempts to encrypt or decrypt operations maxCount, determine whether it is possible to try to encrypt the video file to be transmitted; if the judgment condition is met, then execute Step S23, if the judgment condition is not met, then execute step S3;

S23, set the operation identification of encryption or decryption operation for the video file, and judge whether the operation identification setting is successful, if successful, then perform step S24, if failed, then try to add 1 to the count of times of encryption or decryption operations, and repeat steps S22 and S23 , until the identification is successful or the judgment condition of step S22 is not satisfied;

S24. According to the needs of the user, encrypt or decrypt the content of the specified location of the video file to be transmitted; wherein, as shown in Figure 2, this step S24 includes:

S241. Taking the header 1024 bytes of the video file to be transmitted as the object of encryption or decryption;

S242. Set the initial position as site=0;

S243, judging whether the encryption of the header 1024 bytes of the currently to-be-transmitted video file is completed, if not completed, then take out 16 bytes of data from the 1024 bytes, and encrypt the 16 bytes of data, if completed Encryption, take out 16 bytes of data from 1024 bytes, and decrypt the 16 bytes of data; if the reading of data fails or the encryption/decryption operation fails in this step, exit directly

S244. Write the encrypted or decrypted data into the site, and exit if the writing fails;

S245, taking 16 bytes out of the 1024 bytes, which is site=site+16, and repeatedly executing steps S243 to S245 until all the 1024 bytes of data are encrypted or decrypted;

S25. Determine whether the encryption or decryption operation is successful. If successful, complete the encryption or decryption operation of the video file to be transmitted. If it fails, perform steps S22 to S25 until the operation succeeds or the judgment condition of step S22 is not satisfied.

S3. Judging whether the encryption or decryption processing operation is successful, and returning the final operation status to the user to complete the automatic identification encryption operation. Described step S3 comprises:

S31. If the encryption or decryption operation is successful, return the operation success state;

S32. If the encryption or decryption operation fails, try to roll back to the state before the video file is encrypted or decrypted;

S33. If the rollback operation is successful, return the operation failure state, and if the rollback operation fails, return the unrecoverable state.

This scheme further discloses an automatic identification and encryption system for video data transmission, the system includes:

The file identification unit obtains the video file transmission request, confirms the path of the video file to be transmitted and the current state of the video file to be transmitted, that is, encrypted, decrypted or unprocessed;

The encryption unit encrypts or decrypts the current video file to be transmitted according to user encryption or decryption instructions; the encryption unit includes:

The initialization module initializes the initial state of the maximum number of encryption or decryption operations maxCount, the current number of encryption or decryption operations count, and the video encryption or decryption results;

The first judging module, by judging conditions: whether the encryption or decryption state is an operation failure state and the current encryption or decryption times count is less than the maximum number of attempts to encrypt or decrypt operations maxCount, to determine whether to try to encrypt the video file to be transmitted; if the judging condition is satisfied , the operation identification of the encryption or decryption operation is set for the video file, if the judgment condition is not satisfied, the operation state determined by the state feedback unit is returned to the user;

The operation identification setting module is used to set the operation identification of the encryption or decryption operation for the video file, and judge whether the operation identification setting is successful, if successful, perform the user-specified content encryption or decryption operation, and if it fails, try the encryption or decryption operation times count Add 1, and repeat the operations of the step first judging module and the operation identification setting module, until the identification succeeds or the judging condition of the first judging module is not met;

Specify the content processing module to encrypt or decrypt the content at the specified location of the video file to be transmitted according to user needs;

The second judgment module judges whether the encryption or decryption operation is successful. If successful, the encryption or decryption operation of the video file to be transmitted is completed. If it fails, the first judgment module, the operation identification setting module, the designated content processing module and the second judgment module are executed. The operation of the second judging module until the operation succeeds or the judging condition of the first judging module is not met.

The state feedback unit judges whether the encryption or decryption processing operation is successful, and returns the final operation state to the user to complete the automatic identification encryption operation. The state feedback unit includes:

The encryption result judging module, if the encryption or decryption operation is successful, then returns the operation success state, if the encryption or decryption operation fails, then tries to roll back to the state before the video file is encrypted or decrypted;

The rollback result judging module, if the rollback operation is successful, returns the operation failure state, and if the rollback operation fails, returns the unrecoverable state.

This program can be written in C/C++ language to generate a dynamic library that can be called in the system environment for calling by video software. For example, a dynamic library so file that can be called in the Android environment is generated for calling by video software in the Android environment. If the solution uses conventional code, the storage space occupied is 104k, and if the library file is compiled and generated, the storage space is about 30k, which is more suitable for the quick call of the server or other related video playback software.

The present invention will be further described below by a group of embodiment:

As shown in Fig. 1, the present invention provides an automatic identification encryption and decryption method for video data transmission. The concrete steps of this method are as follows:

In step S1, the transmitted parameters are obtained and processed, including the path of the video file to be encrypted or decrypted, and specific operation instructions; wherein, the specific operation instructions are to check the encryption and decryption status of the video file, encryption operation and decryption operation. If the operation instruction is to check the encryption and decryption status of the video file, step S2 is executed.

In step S2, the status of the video file will be judged, and the returned status has three statuses: encrypted, decrypted and unprocessed. Encrypted state means that the target video is currently encrypted and needs to be decrypted to browse normally; Decrypted state means that the target video is now decrypted and can be viewed; Unprocessed state means that the video has never been encrypted or decrypted.

If the operation instruction is to encrypt or decrypt the video file, step S3 is executed.

Step S2 will encrypt or decrypt the video file according to the instruction. After the operation is completed, execute S3 to return the execution result of the encryption/decryption operation. The result is divided into encryption or decryption. If the encryption or decryption fails, the program will try Roll back the state before the operation of the video file; the video file cannot be restored, and when the encryption or decryption fails, and the rollback operation also fails, this status indicator will be returned. When the operation instruction is to encrypt or decrypt a video file, step S3 is performed.

For the specific encryption or decryption process in step S2 is a local loop encryption or decryption method constructed by this scheme, the specific execution steps of the method include:

S21. Initialize the maximum number of encryption or decryption operations maxCount, the current number of encryption or decryption operations count, and the initial state of the video encryption or decryption result;

S22. Pass the judgment condition: whether the encryption or decryption status is an operation failure state and the current encryption or decryption times count is less than the maximum number of attempts to encrypt or decrypt operations maxCount, determine whether it is possible to try to encrypt the video file to be transmitted; if the judgment condition is met, then execute Step S23, if the judgment condition is not met, then execute step S3;

S23, set the operation identification of encryption or decryption operation for the video file, and judge whether the operation identification setting is successful, if successful, then perform step S24, if failed, then try to add 1 to the count of times of encryption or decryption operations, and repeat steps S22 and S23 , until the identification is successful or the judgment condition of step S22 is not satisfied;

S24. Encrypt or decrypt the content at the specified location of the video file to be transmitted according to user requirements;

S25. Determine whether the encryption or decryption operation is successful. If successful, complete the encryption or decryption operation of the video file to be transmitted. If it fails, perform steps S22 to S25 until the operation succeeds or the judgment condition of step S22 is not satisfied.

4. The automatic identification and encryption method according to claim 1, wherein said S24 includes:

S241. Taking the header 1024 bytes of the video file to be transmitted as the object of encryption or decryption;

S242. Set the initial position as site=0;

S243, judging whether the encryption of the header 1024 bytes of the currently to-be-transmitted video file is completed, if not completed, then take out 16 bytes of data from the 1024 bytes, and encrypt the 16 bytes of data, if completed Encryption, take out 16 bytes of data from 1024 bytes, and decrypt the 16 bytes of data; if the read data fails or the encryption/decryption operation fails, it exits directly;

S244. Write the encrypted or decrypted data into the site, and exit if the writing fails;

S245. Then take 16 bytes out of the 1024 bytes, that is, site=site+16, and repeat step S243 to step S245 until all the 1024 bytes of data are encrypted or decrypted.

Step S3 will be entered after the state is the operation success state, or the number of encrypted or decrypted operations is greater than or equal to the maximum number of attempted encryption or decrypted operations.

In step S3, the following operations will be performed according to the final result. When the encryption or decryption operation is successful, return to the operation success state; when the encryption or decryption operation fails, try to roll back to the state before the video file operation. If the rollback is successful, the return operation fails status; if the rollback operation also fails, the unrecoverable status is returned.

Entire video encryption or decryption of video files is complete.

Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, on the basis of the above description, they can also make It is not possible to exhaustively list all the implementation methods here, and all obvious changes or changes derived from the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims (10)

1. a kind of automatic identification encrypting and decrypting method for video data transmission, it is characterised in that include the step of the method：

S1, the Transfer Parameters for obtaining video file to be transmitted, confirmation video file path to be transmitted and video file to be transmitted Current state；

S2, according to user encryption or decryption instructions, current video file to be transmitted is encrypted or decryption processing；

S3, judge encryption or decryption process operation whether success, and final mode of operation is returned to into user, complete knowledge automatically Other cryptographic operation.

2. automatic identification encryption method according to claim 1, it is characterised in that the video file to be transmitted it is current State includes：Encrypt, decrypted and untreated three kinds of states.

3. automatic identification encryption method according to claim 1, it is characterised in that step S2 includes：

S21, attempt encryption or decryption oprerations number of times maxCount, current crypto or decryption oprerations number of times count and regard to maximum The original state of frequency encryption or decrypted result carries out initializing set；

S22, by Rule of judgment：Whether encryption or decrypted state are operation failure state and current crypto or decryption number of times Count attempts encryption or decryption oprerations number of times maxCount less than maximum, decides whether to attempt as video file to be transmitted Encryption；If meeting Rule of judgment, execution step S23, if being unsatisfactory for Rule of judgment, execution step S3；

S23, the operation mark of encryption or decryption oprerations is set for video file, and judges that operation mark arranges whether success, if Success, then execution step S24, if failure, it tries encryption or decryption oprerations number of times count add 1, and repeat step S22 and S23, till the Rule of judgment for identifying successfully or being unsatisfactory for step S22；

S24, according to user's request, the content for treating transmitting video files specified location is encrypted or decryption oprerations；

S25, judge encryption or decryption oprerations whether success, if success, complete encryption or the decryption behaviour of video file to be transmitted Make, if failure, execution step S22 to S25, till the Rule of judgment for operating successfully or being unsatisfactory for step S22.

4. automatic identification encryption method according to claim 1, it is characterised in that the S24 includes：

S241, using the byte of head 1024 of video file to be transmitted as encryption or decrypt object；

S242, initial position is set as site=0；

Whether S243, the byte of head 1024 of the current video file to be transmitted of judgement are encrypted and are completed, if not completing, from 1024 words The data of 16 bytes are taken out in section, and this 16 byte datas are encrypted, if completing encryption, from 1024 bytes It is middle to take out the data of 16 bytes, and process is decrypted to this 16 byte datas；

S244, by after encryption or decryption data write site at, exit if failure is write；

S245,16 bytes, as site=site+16 are taken in 1024 byte again, and repeat execution step S243 to walking Rapid S245, until 1024 byte data is all encrypted or decryption is completed.

5. automatic identification encryption method according to claim 1, it is characterised in that if reading data in step S243 Failure or encryption/decryption failure, then directly exit.

6. automatic identification encryption method according to claim 1, it is characterised in that step S3 includes：

If S31, encryption or decryption oprerations success, operation success status are returned；

If S32, encryption or decryption oprerations failure, it tries roll back to video file be encrypted or decryption oprerations before state；

If S33, rolling back action success, return operation failure state, if rolling back action failure, return cannot reset condition.

7. a kind of automatic identification encryption system for video data transmission, it is characterised in that the system includes：

File identification unit, obtains video file transfer request, confirms video file path to be transmitted and video file to be transmitted Current state；

Ciphering unit, according to user encryption or decryption instructions, is encrypted or decryption processing to current video file to be transmitted；

State feedback unit, judges whether encryption or decryption process operation is successful, and final mode of operation is returned to into user, Complete automatic identification cryptographic operation.

8. automatic identification encryption system according to claim 6, it is characterised in that the video file to be transmitted it is current State includes：Encrypt, decrypted and untreated three kinds of states.

9. automatic identification encryption system according to claim 6, it is characterised in that include in the ciphering unit：

Initialization module, to maximum encryption or decryption oprerations number of times maxCount, current crypto or decryption oprerations number of times are attempted The original state of count and video-encryption or decrypted result carries out initializing set；

First judge module, by Rule of judgment：Whether encryption or decrypted state are operation failure state and current crypto or solution Close number of times count attempts encryption or decryption oprerations number of times maxCount less than maximum, decides whether to attempt being regarded for be transmitted Frequency file is encrypted；If meeting Rule of judgment, for video file arrange encryption or decryption oprerations operation mark, if being unsatisfactory for sentencing Broken strip part, then return the mode of operation that state feedback unit determines to user；

Operation mark setting module, is that video file arranges the operation mark of encryption or decryption oprerations, and judges that operation mark sets Whether successful put, if success, carries out user-specific content encryption or decryption oprerations, if failure, it tries encryption or decryption are grasped Make number of times count and plus 1, and the operation of the judge module of repeat step first and operation mark setting module, until identify successfully or Till being unsatisfactory for the Rule of judgment of the first judge module；

Given content processing module, according to user's request, the content for treating transmitting video files specified location is encrypted or solves Close operation；

Second judge module, judges whether encryption or decryption oprerations are successful, if success, completes the encryption of video file to be transmitted Or decryption oprerations, if failure, performs the first judge module, operation mark setting module, given content processing module and second The operation of judge module, till operating success or being unsatisfactory for the Rule of judgment of the first judge module.

10. automatic identification encryption system according to claim 6, it is characterised in that the state feedback unit includes：

Encrypted result judge module, if encryption or decryption oprerations success, returns operation success status, if encryption or decryption oprerations Failure, it tries roll back to video file be encrypted or decryption oprerations before state；

Rollback result judge module, if rolling back action success, returns operation failure state, if rolling back action failure, returns Cannot reset condition.