TWI679884B - A video encryption and decryption method and device - Google Patents

Abstract

A method for video encryption and decryption, applied to a video playback system with variable frame rate, includes the steps of: obtaining an original playback frame rate of a video material to be encrypted and each original video frame; Frames are transposed and decomposed to generate a corresponding frame sequence to obtain encrypted video data; adjust the original playback frame rate corresponding to the frame sequence and control the video playback system to adjust the frame sequence to the frame sequence with the adjusted playback frame rate Play. The invention also provides a device for video encryption and decryption.

Description

Method and device for video encryption and decryption

The present invention relates to data processing technology, and particularly to a method and device for video encryption and decryption.

With the development trend of miniaturization of projection equipment, in the future, people can find a wall or desktop anytime, anywhere, take out a mini-type projection equipment and connect to the Internet, and start browsing web pages, photos, videos, or making video conferences. However, people do not want the projected image content to be presented in front of others without privacy.

In view of the above, it is necessary to provide a method for video encryption and decryption, which can effectively encrypt the content of the video being played, and the user can view it after decryption, thereby protecting the privacy of the user.

In view of the above, it is also necessary to provide a device for video encryption and decryption, which is used to effectively encrypt the content of the video that is played, and the user can view it after decryption, thereby protecting the user's privacy.

The video encryption device is applied to a video playback system with a variable playback frame rate. The video encryption device includes a first acquisition module for acquiring an original playback frame rate of each video material to be encrypted and each original playback frame rate. Video frame; an encryption module, which is used to transpose and decompose each original video frame to generate a corresponding frame sequence, so as to obtain an encrypted view Frequency data; an adjustment module for adjusting an original playback frame rate corresponding to the frame sequence and controlling the video playback system to play the frame sequence at the adjusted playback frame rate.

The video decryption device includes a second acquisition module for acquiring an original playback frame rate and an adjusted playback frame rate corresponding to encrypted video data. The encrypted video data is transposed and A video data that is decomposed and processed; a judging module for judging each frame sequence according to the original playback frame rate and the adjusted playback frame rate; a decryption module for deciphering from a preset decryption rule from The frame sequence reads out an original video frame.

The video encryption method is applied to a video playback system with a variable frame rate. The video encryption method includes the steps of: obtaining an original playback frame rate of a video material to be encrypted and each original video frame; Video frames are transposed and decomposed to generate a corresponding frame sequence to obtain encrypted video data; adjust an original playback frame rate corresponding to the frame sequence and control the video playback system to adjust the adjusted playback frame rate to The frame sequence is played.

The video decryption method includes the steps of obtaining an original playback frame rate and an adjusted playback frame rate corresponding to encrypted video data, and the encrypted video data is a video data that has been transposed and decomposed; according to The original playback frame rate and the adjusted playback frame rate determine each frame sequence; an original video frame is read from the frame sequence according to a preset decryption rule.

1‧‧‧Video Encryption Device

20‧‧‧first memory

30‧‧‧first processor

40‧‧‧First acquisition module

50‧‧‧Encryption Module

510‧‧‧ transpose submodule

520‧‧‧Decomposed submodule

530‧‧‧Sorting submodule

60‧‧‧adjustment module

2‧‧‧Video decryption device

70‧‧‧Second memory

80‧‧‧ second processor

90‧‧‧Second Acquisition Module

100‧‧‧ Judgment Module

110‧‧‧Decryption Module

FIG. 1 is a functional module diagram of a video encryption device according to a preferred embodiment of the present invention.

FIG. 2 is a functional module diagram of a video decryption device according to a preferred embodiment of the present invention.

FIG. 3 is a schematic diagram of video frame changes during a video encryption process according to a preferred embodiment of the present invention.

FIG. 4 is a schematic diagram of video frame changes during a video decryption process according to a preferred embodiment of the present invention.

FIG. 5 is a flowchart of a video encryption method according to a preferred embodiment of the present invention.

FIG. 6 is a flowchart of a video decryption method according to a preferred embodiment of the present invention.

1 is a functional module diagram of a video encryption device 1 according to a preferred embodiment of the present invention. The video encryption device 1 is mainly composed of a first acquisition module 40, an encryption module 50, and an adjustment module. 60 and a first memory 20 and a first processor 30. The encryption module 50 further includes a transposed submodule 510, a decomposition submodule 520, and a sorting submodule 530. The video encryption device 1 is applied to a video playback system with a variable playback frame rate, which may be a projection device or a part of an image playback device, or an external device attached to a projection device, or it may exist separately. An electronic device for controlling and managing video playback.

The module is configured to be executed by one or a plurality of processors (the first processor 30 in this embodiment) to complete the present invention. The module referred to in the present invention is a computer program segment that performs a specific function. The first memory 20 is used to store data such as codes of the video encryption device 1.

The first obtaining module 40 is configured to obtain an original playback frame rate and each original video frame of a video material to be encrypted. In this embodiment, the first acquisition module 40 separates the image and sound in a video material to be encrypted to obtain a plurality of original video frames included in the image. For example, the first obtaining module 40 obtains an original video frame A and an original video frame B to be encrypted, and the original playback frame rate is 25 Hz. That is, the video material to be encrypted includes an original video frame A and B, and the original playback frame rate is 25 Hz, that is, the time for playing one frame is 0.04 seconds. Referring to FIG. 3 (1), the original video frames A and B respectively occupy time periods T1 to T2 and T2 to T3, and T3-T2 = T2-T1 = 0.04 seconds.

The encryption module 50 is used for transposing and decomposing each of the original video frames to generate a corresponding frame sequence, so as to obtain encrypted video data.

The transpose sub-module 510 is used to transpose the original video frame to generate a corresponding complementary frame. In this embodiment, the transposition module 510 transposes the original video frames A and B respectively to obtain a complementary frame X corresponding to the original video frame A and a complementary frame Y corresponding to the original video frame B ( (See Figure 3 (2)).

The decomposition submodule 520 is configured to decompose the original video frame and the complementary frame into complex decomposition frames respectively according to different preset complex decomposition modes. In this embodiment, the original video frame and the complementary frame are respectively decomposed into two decomposed frames for description. In other embodiments, it may be decomposed into complex decomposed frames as required. The decomposition sub-module 520 decomposes the original video frames A and B and the complementary frames X and Y into decomposition frames A + and A-, B + and B-, X + and X- respectively according to different preset complex decomposition modes. , Y + and Y-.

The decomposition mode for the original video frames A and B is different from the complex decomposition mode for the inverted frames X and Y. That is, any two of the obtained decomposition frames A +, A-, X +, and X- cannot be complementary. Similarly, any two of the decomposition frames B +, B-, Y +, and Y- Nor can they complement each other.

Superposition of the decomposed frames can directly obtain the corresponding original video frame or the complementary frame. The different decomposition modes can be considered as different complex numbers. For example, the original video frame A is decomposed into 9 parts according to 3 * 3. One of the decomposed frames A + contains 5 of them and the other decomposed frame A- contains the remaining 4 parts. When two decomposed frames are superimposed, Obtain an original video frame A directly. For the complementary frame X, it is decomposed into 21 parts according to 3 * 7. One of the decomposed frames X + contains 13 of them, and the other decomposed frame X- contains the remaining 8 parts. When two decomposed frames are superimposed, A complementary frame X can be obtained directly.

The sorting submodule 530 sorts all the decomposed frames of the original video frame and all the decomposed frames of the complementary frame within a time interval occupied by the original video frame according to a preset sorting rule to generate a frame sequence. . In this embodiment, the sorting submodule 530 will decompose the frames A + and A- and X + and X- are sorted within a time period T1 to T2 occupied by an original video frame A, and a frame sequence corresponding to the original video frame A is obtained, and frames B + and B- and Y + and Y will be decomposed. -Sort within a time period T2 to T3 occupied by an original video frame B to obtain a frame sequence corresponding to the original video frame B. This sorting rule is preset in this embodiment by a pseudo-random sorting method. For example, the decomposition frames A +, A-, X +, and X- are sorted according to the sequence numbers of 1, 4, 2, and 3, and the decomposition frame B + is sorted. , B-, Y +, Y- are sorted according to the serial numbers 1, 3, 2, and 4 (see Figure 3 (3)). The pseudo-random sorting method means that the sorting method is a reversible random sorting method. The so-called reversible means that a sorting rule for decryption can be calculated based on a sorting rule for encryption. In other embodiments, the sorting rule may be another sorting method. All the obtained frame sequences constitute the encrypted video data.

In other embodiments, the encryption module 50 may also insert an interfering video frame between the original video frames, perform the above complementary and decomposition processing on the interfering video frame, and decompose a decomposed frame corresponding to the interfering video frame. The decomposed frames of the interference complementary frame and the decomposed frame of the original video frame and the decomposed frame of the complementary frame are sorted together to obtain the frame sequence, thereby enhancing the security effect of the encrypted video data.

The adjustment module 60 is configured to adjust an original playback frame rate corresponding to the frame sequence (encrypted video data) and control the video playback system to play the frame sequence at the adjusted playback frame rate. The adjustment module 60 calculates an adjusted playback frame rate of 25 Hz * 4 = 100 Hz based on the original playback frame rate of 25 Hz and the number of frames contained in the frame sequence. The adjustment module 60 then controls the video playback system to adjust the playback frame rate from 25 Hz to 100 Hz to play the frame sequence.

It is worth noting that when the frame sequence is played according to the adjusted 100Hz playback frame rate, the time periods T1 to T2 and T2 to T3 include all the decomposed frames of the original video frame and their corresponding complementary frames The frame sequence of all decomposed frames, according to the effect of visual persistence, the frame sequence After playing out, it is finally displayed as a grayscale image (see Figure 3 (4)). Therefore, the video encryption device can effectively encrypt a video image being played.

2 is a functional module diagram of a video decryption device 2 according to a preferred embodiment of the present invention. The video decryption device 2 is mainly composed of a second acquisition module 90, a judgment module 100, and a decryption module. 110, and a second memory 70 and a second processor 80. The video decryption device 2 is an independent electronic device used in conjunction with the video playback system, and may be a wearable electronic device, such as a smart glasses.

The module is configured to be executed by one or more processors (the second processor 80 in this embodiment) to complete the present invention. The module referred to in the present invention is a computer program segment that performs a specific function. The second memory 70 is used for storing data such as a code of the video decryption device 2.

The second obtaining module 90 is configured to obtain an original playback frame rate and an adjusted playback frame rate corresponding to encrypted video data. Since the video decryption device 2 is used in conjunction with the video playback system, the second acquisition module 90 may request the video playback system to obtain an original playback frame rate and an adjusted playback data corresponding to the encrypted video data. A playback frame rate. The video playback system sends the original playback frame rate and the adjusted playback frame rate to the second acquisition module 90 according to the acquisition request of the second acquisition module 90. In addition, a sorting rule stored in the encryption process of the video playback system is also sent to the second obtaining module 90 at the same time. In this embodiment, the second acquisition module 90 acquires the original playback frame rate of 25 Hz and the adjusted playback frame rate of 100 Hz.

The determining module 100 determines each frame sequence according to the original playback frame rate and the adjusted playback frame rate. Specifically, the determining module 100 divides the adjusted playback frame rate by the original playback frame rate to obtain the number of frames included in a frame sequence, and then determines each frame sequence in combination with a playback time synchronized by the video playback system. The synchronized playback time can be considered as the start and end time of each frame sequence, and the start and end time of each frame in the frame sequence. In this embodiment In the judgment module 100, it is determined that a frame sequence in encrypted video data every 4 seconds contains 4 video frames, such as A +, X +, X-, A- or B +, Y +, B-, Y. -(See Figure 4 (1)). In this embodiment, the determining module 100 only needs to obtain the number of frames included in each frame sequence and a time interval of each frame in the frame sequence, and does not need to obtain the content of the frames. In other embodiments, the determination module 100 may also obtain the content of each frame in the frame sequence according to the video playback system.

The adjustment module 60 is configured to adjust an original playback frame rate corresponding to the frame sequence (encrypted video data) and control the video playback system to play the frame sequence at the adjusted playback frame rate. The adjustment module 60 calculates an adjusted playback frame rate of 25 Hz * 4 = 100 Hz based on the original playback frame rate of 25 Hz and the number of frames contained in the frame sequence. The adjustment module 60 then controls the video playback system to adjust the playback frame rate from 25 Hz to 100 Hz to play the frame sequence.

It is worth noting that when the frame sequence is played according to the adjusted 100Hz playback frame rate, the time periods T1 to T2 and T2 to T3 include all the decomposed frames of the original video frame and their corresponding complementary frames. According to the effect of visual persistence, the frame sequence of all the decomposed frames is finally displayed as a grayscale image after being played out (see FIG. 3 (4)). Therefore, the video encryption device can effectively encrypt a video image being played.

2 is a functional module diagram of a video decryption device 2 according to a preferred embodiment of the present invention. The video decryption device 2 is mainly composed of a second acquisition module 90, a judgment module 100, and a decryption module. 110, and a second memory 70 and a second processor 80. The video decryption device 2 is an independent electronic device used in conjunction with the video playback system, and may be a wearable electronic device, such as a smart glasses.

The module is configured to be executed by one or more processors (the second processor 80 in this embodiment) to complete the present invention. The module referred to in the present invention is a computer program segment that performs a specific function. The second memory 70 is used for storing data such as a code of the video decryption device 2.

The second obtaining module 90 is configured to obtain an original playback frame rate and an adjusted playback frame rate corresponding to encrypted video data. Since the video decryption device 2 is used in conjunction with the video playback system, the second acquisition module 90 may request the video playback system to obtain an original playback frame rate and an adjusted playback data corresponding to the encrypted video data. A playback frame rate. The video playback system sends the original playback frame rate and the adjusted playback frame rate to the second acquisition module 90 according to the acquisition request of the second acquisition module 90. In addition, a sorting rule stored in the encryption process of the video playback system is also sent to the second obtaining module 90 at the same time. In this embodiment, the second acquisition module 90 acquires the original playback frame rate of 25 Hz and the adjusted playback frame rate of 100 Hz.

The determining module 100 determines each frame sequence according to the original playback frame rate and the adjusted playback frame rate. Specifically, the determining module 100 divides the adjusted playback frame rate by the original playback frame rate to obtain the number of frames included in a frame sequence, and then determines each frame sequence in combination with a playback time synchronized by the video playback system. The synchronized playback time can be considered as the start and end time of each frame sequence, and the start and end time of each frame in the frame sequence. In this embodiment, the judging module 100 judges that a frame sequence in encrypted video data every 4 seconds contains 4 video frames, such as A +, X +, X-, A- or B +, Y +, B-, Y- (see Figure 4 (1)). In this embodiment, the determining module 100 only needs to obtain the number of frames included in each frame sequence and a time interval of each frame in the frame sequence, and does not need to obtain the content of the frames. In other embodiments, the determination module 100 may also obtain the content of each frame in the frame sequence according to the video playback system.

The adjustment module 60 is configured to adjust an original playback frame rate corresponding to the frame sequence (encrypted video data) and control the video playback system to play the frame sequence at the adjusted playback frame rate. The adjustment module 60 is based on the original playback frame rate of 25 Hz and the number of frames included in the frame sequence. 4. Calculate a adjusted playback frame rate of 25Hz * 4 = 100Hz. The adjustment module 60 then controls the video playback system to adjust the playback frame rate from 25 Hz to 100 Hz to play the frame sequence.

It is worth noting that when the frame sequence is played according to the adjusted 100Hz playback frame rate, the time periods T1 to T2 and T2 to T3 include all the decomposed frames of the original video frame and their corresponding complementary frames. According to the effect of visual persistence, the frame sequence of all the decomposed frames is finally displayed as a grayscale image after being played out (see FIG. 3 (4)). Therefore, the video encryption device can effectively encrypt a video image being played.

2 is a functional module diagram of a video decryption device 2 according to a preferred embodiment of the present invention. The video decryption device 2 is mainly composed of a second acquisition module 90, a judgment module 100, and a decryption module. 110, and a second memory 70 and a second processor 80. The video decryption device 2 is an independent electronic device used in conjunction with the video playback system, and may be a wearable electronic device, such as a smart glasses.

The module is configured to be executed by one or more processors (the second processor 80 in this embodiment) to complete the present invention. The module referred to in the present invention is a computer program segment that performs a specific function. The second memory 70 is used for storing data such as a code of the video decryption device 2.

The second obtaining module 90 is configured to obtain an original playback frame rate and an adjusted playback frame rate corresponding to encrypted video data. Since the video decryption device 2 is used in conjunction with the video playback system, the second acquisition module 90 may request the video playback system to obtain an original playback frame rate and an adjusted playback data corresponding to the encrypted video data. A playback frame rate. The video playback system sends the original playback frame rate and the adjusted playback frame rate to the second acquisition module 90 according to the acquisition request of the second acquisition module 90. In addition, a sorting rule stored in the encryption process of the video playback system is also sent to the second obtaining module 90 at the same time. In this embodiment, the second acquisition module 90 acquires the original playback frame rate of 25 Hz and the adjusted playback frame rate of 100 Hz.

The determining module 100 determines each frame sequence according to the original playback frame rate and the adjusted playback frame rate. Specifically, the determining module 100 divides the adjusted playback frame rate by the original playback frame rate to obtain the number of frames included in a frame sequence, and then determines each frame sequence in combination with a playback time synchronized by the video playback system. The synchronized playback time can be considered as the start and end time of each frame sequence, and the start and end time of each frame in the frame sequence. In this embodiment, the judging module 100 judges that a frame sequence in encrypted video data every 4 seconds contains 4 video frames, such as A +, X +, X-, A- or B +, Y +, B-, Y- (see Figure 4 (1)). In this embodiment, the determining module 100 only needs to obtain the number of frames included in each frame sequence and a time interval of each frame in the frame sequence, and does not need to obtain the content of the frames. In other embodiments, the determination module 100 may also obtain the content of each frame in the frame sequence according to the video playback system.

The decryption module 110 is configured to read an original video frame from the frame sequence according to a preset decryption rule. The decryption rule actually calculates a decryption order according to a sort rule in the encryption process, and then reads out a complex decomposition frame corresponding to the original video frame in the frame sequence according to the decryption order rule. In this embodiment, the order of the frame sequence A +, X +, X-, A- and frame sequence B +, Y +, B-, Y- in the encryption process is 1, 4, 2, 3, and 1, 3 , 2,4. Therefore, the collation for decryption is 1,4 and 1,3. The decryption module 110 reads out frames 1, 4 in the frame sequence A +, X +, X-, A-, and reads frames 1, 3 in the frame sequence B +, Y +, B-, Y- Out, two decomposed frames of an original video frame A and two decomposed frames of an original video frame B are obtained (see FIG. 4 (2)).

In this embodiment, the decryption module 110 reads out the complex decomposition frame corresponding to the original video frame, and does not perform any processing on the complex decomposition frame of the complementary frame. In other embodiments, the decomposed frames corresponding to the original video frame may also be read out, and the decomposed frames of the complementary frame may be filtered or read and other processing may be performed. After decryption, the time period from T1 to T2 and T2 The period from T3 to T2 respectively include two original frames of original video frame A and two original frames of original video frame B. According to the effect of visual persistence, the frame sequence is displayed as the original video frame A after being played out. And B (see Figure 4 (3)).

FIG. 5 is a flowchart of a video encryption method according to a preferred embodiment of the present invention. The video encryption method is applied to a video playback system with a variable playback frame rate, and is implemented by a processor executing a code stored in a memory.

The video encryption method mainly includes the following steps:.

Step S12: Obtain an original playback frame rate of a video material to be encrypted and each original video frame.

Step S14: Transpose the original video frame to generate a corresponding complementary frame.

Step S16: Decompose the original video frame and the corresponding complementary frame into complex decomposition frames respectively according to different preset complex decomposition modes. For these decomposed frames, it can be considered that superimposing all decomposed frames of the same original video frame or complementary frame can directly obtain the original video frame or the complementary frame. The different complex number decomposition modes can be considered as different complex number patterns.

Step S18: Sort all the decomposed frames of the original video frame and all the decomposed frames of the complementary frame within a time interval occupied by the original video frame according to a preset sorting rule to generate a frame sequence :.

Step S22: Adjust an original playback frame rate corresponding to the frame sequence and control the video playback system to play the frame sequence at the adjusted playback frame rate. It is worth noting that when the frame sequence is played according to the adjusted playback frame rate, the frame sequence that includes all the decomposed frames of the original video frame and all the decomposed frames of a corresponding complementary frame is based on visual persistence. Effect, the frame sequence is finally displayed as a grayscale image after being played out.

Refer to FIG. 6, which is a flowchart of a video decryption method according to a preferred embodiment of the present invention. The video decryption method is applied to a video playback system and is implemented by a processor executing a program code stored in a memory.

The video decryption method mainly includes the following steps.

Step S32: Obtain an original playback frame rate and an adjusted playback frame rate corresponding to the encrypted video data. The encrypted video data is a video data that has been transposed and decomposed:

Step S34: Determine each frame sequence according to the original playback frame rate and the adjusted playback frame rate. Specifically: Divide the adjusted playback frame rate by the original playback frame rate to obtain the number of frames contained in a frame sequence, and then combine a playback time synchronized with the video playback system and each video frame played to determine each Frame sequence.

Step S36: Read an original video frame from the frame sequence according to a preset decryption rule. The decryption rule actually reads all the decomposed frames of an original video frame in the frame sequence according to a sorting rule in the encryption process. After decryption, the frame sequence only contains all the decomposed frames of the original video frame. Therefore, according to the effect of visual persistence, the decrypted frame sequence is displayed as an original video frame after being played out.

The above embodiments are only used to illustrate the technical solution of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or equivalently replaced. Without departing from the spirit and scope of the technical solution of the present invention.

Claims (10)

A video encryption device is applied to a video playback system with a variable playback frame rate. The video encryption device includes: a first acquisition module for acquiring an original playback frame rate and each original of a video material to be encrypted; Video frame; an encryption module for transposing the original video frame to generate a corresponding complementary frame, and respectively decomposing the original video frame and the complementary frame into complex decomposed frames according to different preset complex decomposition modes A corresponding frame sequence is generated to obtain encrypted video data. An adjustment module is used to adjust an original playback frame rate corresponding to the frame sequence and control the video playback system to adjust the adjusted playback frame rate. The frame sequence is played. The video encryption device according to claim 1, wherein the encryption module specifically comprises: a sorting submodule, configured to sort the decomposed frames of the original video frame and the complementary frames according to a preset sorting rule. The decomposed frames are sorted within a time interval period occupied by the original video frame to generate the frame sequence. The video encryption device according to claim 1, wherein the adjustment module is further configured to multiply the original playback frame rate by the number of frames included in the frame sequence to calculate the adjusted playback frame rate. A video decryption device. The video decryption device includes a second acquisition module for acquiring an original playback frame rate and an adjusted playback frame rate and an ordering rule corresponding to encrypted video data. The video data is a video data that has been transposed and decomposed; a judgment module is used to determine each frame sequence according to the original playback frame rate and the adjusted playback frame rate; a decryption module is used to A decryption rule, which is calculated according to the sorting rule, reads an original video frame from the frame sequence. The video decryption device according to claim 4, wherein the decryption module is further configured to read all the decomposed frames of an original video frame in the frame sequence according to the decryption rule. A video encryption method is applied to a video playback system with variable frame rate. The video encryption method includes the steps of: obtaining an original playback frame rate of a video material to be encrypted and each original video frame; The video frame is transposed to generate a corresponding complementary frame, and the original video frame and the complementary frame are respectively decomposed into a plurality of decomposed frames to generate a corresponding frame sequence according to different preset complex decomposition modes to obtain the encrypted frame sequence. Video data; adjusting an original playback frame rate corresponding to the frame sequence and controlling the video playback system to play the frame sequence at the adjusted playback frame rate. The video encryption method according to claim 6, wherein the original video frame is transposed to generate a corresponding complementary frame, and the original video frame and the complementary frame are generated according to different preset complex decomposition modes. Decomposing a frame into a plurality of decomposed frames to generate a corresponding frame sequence specifically includes: according to a preset sorting rule, the decomposed frames of the original video frame and the decomposed frames of the complementary frame in the original video frame. Sort within a time interval to generate the frame sequence. The video encryption method according to claim 6, wherein the step of adjusting an original playback frame rate corresponding to the frame sequence further comprises: multiplying the original playback frame rate by the number of frames included in the frame sequence to calculate the adjustment. The next playback frame rate. A video decryption method. The video decryption method includes the steps of obtaining an original playback frame rate and an adjusted playback frame rate and an ordering rule corresponding to an encrypted video material. The encrypted video data is transposed and Decompose a piece of video data; determine each frame sequence according to the original playback frame rate and the adjusted playback frame rate; calculate a decryption rule based on the sorting rule to decrypt a raw video frame from the frame sequence . The video decryption method according to claim 9, wherein the decoding of a decryption rule calculated according to the sorting rule to read an original video frame from the frame sequence specifically comprises: according to the decryption rule, one of the frame sequences All decomposed frames of the original video frame are read out.