CN113783900B - Encryption and multi-stage calibration method for stream media of unmanned aerial vehicle - Google Patents
Encryption and multi-stage calibration method for stream media of unmanned aerial vehicle Download PDFInfo
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Abstract
The invention discloses an encryption and multi-stage calibration method of stream media of an unmanned aerial vehicle, which is characterized in that based on video stream data collected by the unmanned aerial vehicle, the video stream data is disassembled and packed, one of sub-video transmission data packets is randomly extracted, and part of video data A1, audio data A2 and picture data A3 are extracted; and the server correspondingly generates a random sequence matrix W containing the information of the sub-video transmission data packetnAnd responding to generate random numbers of four levels and four sub-servers corresponding to the four levels, wherein the four sub-servers are arranged and encrypted according to the levels, the current sub-server needs to be unlocked by adopting a key during decryption, the next sub-server starts an unlocking state, and the decryption can be continued by using the key, namely, the operations of multi-level encryption and decryption are adopted, and the sub-video transmission data packets are in a random sequence, so that the encryption level is further enhanced.
Description
Technical Field
The invention belongs to the technical field of stream media information encryption, and particularly relates to an unmanned aerial vehicle stream media encryption and a multi-stage calibration method thereof.
Background
Streaming media (streaming media) refers to a technology and a process of compressing a series of media data, sending the data over the internet, and transmitting video and audio on the internet instantly for viewing, and the technology enables data packets to be sent as streaming media.
Streaming media information transmission refers to the generic term for the technology of transmitting media (audio, video, etc.) over a network. There are two main ways to realize streaming transmission, sequential streaming (progressive streaming) and real-time streaming (real time streaming).
Sequential streaming
Sequential streaming is sequential downloading, where a user downloads a file while watching an online media, and in this process, the user can only watch the downloaded part, but not the un-downloaded part. That is, the user always sees the information transmitted from the server after a delay. Since a standard HTTP server can send this form of file, it is often referred to as HTTP streaming.
The sequential streaming transmission can better ensure the quality of program playing, so the method is more suitable for high-quality videos which are released on a website and can be requested by a user.
The sequential streaming files are placed on standard HTTP or FTP servers, are easy to manage, and are essentially firewall independent. Sequential streaming does not lend itself to long segments and videos with random access requirements, such as lectures, lectures and presentations. It also does not support live broadcasts.
Real-time streaming
Real-time streaming must guarantee matching connection bandwidth so that the media can be viewed in real-time. While the user can view the content before or after the Media arbitrarily during the viewing process, in this transmission mode, if the network transmission condition is not ideal, the received image quality will be worse and the real-Time Streaming will need a specific Server, such as Quick Time Streaming Server, Realserver or Windows Media Server. These servers allow more levels of control over media delivery and thus system setup, management is more complex than standard HTTP servers. Real-time streaming also requires special network protocols such as rtsp (real time streaming protocol) or mms (micro media server). In the presence of firewalls, these protocols are sometimes screened off, resulting in the user not being able to see real-time content at some locations, real-time streaming is always delivered in real-time, and is therefore particularly well suited to live events.
In the streaming media transmission of the existing real-time transmission protocol, audio and video data usually adopts a mature protocol, a frame of data is decomposed into a plurality of packets, and the packets are sequentially transmitted according to the time sequence of the data. When the streaming media data is illegally intercepted or stolen during transmission, the original audio and video data is easily restored, which causes that the security of the streaming media data is low during transmission, and especially for some video stream data which needs strict encryption protection, the existing encryption technology has low security and is easily intercepted or stolen illegally.
Disclosure of Invention
The present invention provides an encryption method for stream media of an unmanned aerial vehicle and a multi-stage calibration method thereof, so as to solve or improve the above-mentioned problems.
In order to achieve the purpose, the invention adopts the technical scheme that:
an encryption and multi-stage calibration method for stream media of an unmanned aerial vehicle comprises the following steps:
s1, acquiring video stream data acquired by the unmanned aerial vehicle;
s2, randomly decomposing the video stream data into N sub-video transmission data packets, and generating N random sequence matrixes W corresponding to the sub-video transmission data packetsnWherein N is less than or equal to N;
s3, randomly selecting one of the N sub-video transport packets, and randomly extracting partial video data a1, partial audio data a2, and partial picture data A3 in one sub-video transport packet;
s4, sending request verification to the server, responding and generating corresponding video data A1, audio data A2, picture data A3 and random sequence matrix WnA1, a2, a3 and an, and subjecting the random numbers a1, a2, a3 and an to random four-level sequencing, including a first-level random number, a second-level random number, a third-level random number and a fourth-level random number;
s5, the server divides the corresponding number of first sub-server, second sub-server, third sub-server and fourth sub-server according to the random number level number, and generates random key corresponding to the number response of sub-serverα1、α2、α3 andαn, and combining the keysα1、α2、α3 andαn is respectively transmitted to a first sub server, a second sub server, a third sub server and a fourth sub server;
s6, according to the arrangement sequence, the keys in the first server are adopted in sequenceα1, encrypting the data packet information corresponding to the first-level random number by using the key in the second serverα2, encrypting the data packet information corresponding to the second-level random number by using the key in the third serverα3, encrypting the data packet information corresponding to the third-level random number by adopting the secret key in the fourth serverαn, encrypting the data packet information corresponding to the fourth-level random number;
s7, the server generates an encryption key data packet containing four key information and a decryption data packet for decrypting the encryption key data packet;
s8, the server obtains the verification request of the receiving end through the encryption communication protocol or the self-defined communication protocol or the private communication protocol, and sends the encryption key data packet and the decryption data packet to the receiving end.
Further, the random sequence matrix W in step S2nComprises the following steps:
wherein Pn is the position of the N-th sub-video transmission data packet in the N sub-video transmission data packets in the sequence; in is the IP address of the nth sub-video transmission data packet; cn is the data size of the nth sub-video transmission data packet; tn is time information of an nth sub-video transmission data packet, including shooting time, ending time and accumulated time of the nth sub-video; qn is the other attribute of the nth sub-video transport packet.
Further, a request verification is issued to the server in step S4, and corresponding video data a1, audio data a2, picture data A3 and random sequence matrix W are generated in responsenAnd the random numbers a1, a2, a3 and an are subjected to random four-level sequencing, including a first-level random number, a second-level random number, a third-level random number and a fourth-level random number, and the random numbers a1, a2, a3 and an include:
the first-level random number a1 corresponds to video data A1, the second-level random number a2 corresponds to audio data A2, the third-level random number A3 corresponds to picture data A3, and the fourth-level random number an corresponds to a random sequence matrix Wn。
Further, still include:
t1, the receiving end receives the encryption key data packet and the decryption data packet sent by the server;
t2, decrypting the encrypted key data packet by using the decrypted data packet to obtain the keyα1. Secret keyα2. Secret keyα3 and secret keyαn；
T3, Using keysα1, decrypting to obtain an IP address of video data A1 in a first sub server corresponding to the first-level random number;
t4, Using keysα2, decrypting to obtain the IP address of the audio data A2 in the second sub server corresponding to the second-level random number;
t5, Using keysα3, decrypting to obtain the IP address of the picture data A3 in the third sub-server corresponding to the third-level random number;
the fourth sub-server releases the locked state if and only if the video data a1 in the first sub-server, the audio data a2 in the second sub-server, and the picture data A3 in the third sub-server are acquired in this order;
t6, Using keysαn, decryption is carried out to obtain a random sequence matrix W in a fourth sub-server corresponding to the fourth-level random numbernA stored IP address;
t7, according to the obtained resultMachine sequence matrix WnReading the nth data In each column In the matrix, and obtaining the sequencing position information Pn In the data packet with the total number of the nth sub-video transmission data packet, the IP address In of the nth sub-video transmission data packet, the data size Cn of the nth sub-video transmission data packet, the time information Tn of the nth sub-video transmission data packet and other attribute information Qn of the nth sub-video transmission data packet;
t8, obtaining the nth sub video transmission data packet according to the IP address In of the nth sub video transmission data packet;
and T9, repeating the steps T1-T8N-1 times, and combining N sub-video transmission data packets according to the sequence position of each sub-video transmission data packet to obtain the complete video stream data collected and transmitted by the unmanned aerial vehicle.
The encryption and multi-stage calibration method for the stream media of the unmanned aerial vehicle, provided by the invention, has the following beneficial effects:
the method is based on video stream data acquired by an unmanned aerial vehicle, the video stream data is disassembled and packed, one sub-video transmission data packet is randomly extracted (not sequentially extracted), and part of video data A1, audio data A2 and picture data A3 are extracted; and the server correspondingly generates a random sequence matrix W containing the information of the sub-video transmission data packetnAnd responding to generate random numbers of four levels and four sub-servers corresponding to the four levels, wherein the four sub-servers are arranged and encrypted according to the levels, the current sub-server needs to be unlocked by adopting a key during decryption, the next sub-server starts an unlocking state, and the decryption can be continued by using the key, namely, the operations of multi-level encryption and decryption are adopted, and the sub-video transmission data packets are in a random sequence, so that the encryption level is further enhanced.
The server generates keys with corresponding number according to the number of the sub servers, and the keys are used for correspondingly decrypting the four sub servers in sequence and also need to be decrypted step by step.
And finally, the receiving end decrypts the encrypted key data packet according to the decrypted data packet to obtain keys for decrypting the four sub-servers.
In addition to this, the present application proceedsOne-step increase of encryption level in random sequence matrix WnThe IP addresses and the arrangement sequence of the corresponding sub-video transmission data packets are hidden in the video playing system, each sub-video transmission data packet can be combined into complete video stream data to be played only after the information is obtained, if the arrangement sequences of a plurality of sub-video transmission data packets are different, the video playing system is judged to be illegal and cannot play the video, and if and only if the arrangement sequences of all the sub-video data packets are complete, the video playing system can play the video.
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Fig. 1 is a flowchart of an encryption method and a multi-stage calibration method for streaming media of an unmanned aerial vehicle.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
According to an embodiment of the present application, referring to fig. 1, the encryption and multi-stage calibration method for streaming media of an unmanned aerial vehicle according to the present solution includes the following steps:
s1, the unmanned aerial vehicle collects video stream data and transmits the video stream data to the server to obtain the video stream data collected by the unmanned aerial vehicle;
s2, randomly decomposing the video stream data into N sub-video transmission data packets, and generating N random sequence matrixes W corresponding to the sub-video transmission data packetsnWherein N is less than or equal to N;
the amount of the disassembly can be measured according to the size of the video stream data and the importance degree of the video stream data, and the specific amount depends on the practical application.
S3, randomly selecting one of the N sub-video transport packets, randomly extracting a part of video data a1, audio data a2 and picture data A3 from the sub-video transport packets, encrypting the part of video data a1, audio data a2 and picture data A3, and performing decryption at a next step or level at least by recognizing a part of the video data a1, audio data a2 and picture data A3.
S4, sending request verification to the server, responding and generating corresponding video data A1, audio data A2, picture data A3 and random sequence matrix WnA1, a2, a3, and an, and subjecting the random numbers a1, a2, a3, and an to a four-level ordering of randomness, including a first-level random number, a second-level random number, a third-level random number, and a fourth-level random number.
The grades of the random numbers are also random, the first-stage random number can be a1, a2 or a3, the second-stage random number can be a1, a2 or a3, the third-stage random number can be a1, a2 or a3, but the fourth-stage random number can only be an.
For the order number correspondence, the embodiment selects the first-level random number a1 corresponding to the video data a1, the second-level random number a2 corresponding to the audio data a2, the third-level random number A3 corresponding to the picture data A3, and the fourth-level random number an corresponding to the random sequence matrix Wn。
Random sequence matrix WnComprises the following steps:
wherein Pn is the position of the N-th sub-video transmission data packet in the N sub-video transmission data packets in the sequence; in is the IP address of the nth sub-video transmission data packet; cn is the data size of the nth sub-video transmission data packet; tn is time information of an nth sub-video transmission data packet, including shooting time, ending time and accumulated time of the nth sub-video; qn is the other attribute of the nth sub-video transport packet.
When specifically identified later, among the data of each column, only the current random sequence matrix W is presentnThe data in (1) is useful information data, and the others are interference information, such as P1, P2, … Pn … PN in the first column, wherein only Pn is effective information.
S5, the server divides a first sub-server, a second sub-server, a third sub-server and a fourth sub-server according to the random number level number, wherein the first sub-server, the second sub-server, the third sub-server and the fourth sub-server can be virtual servers and give virtual storage addresses to the virtual servers, and can also be specific sub-servers.
Random key generation is responded to server corresponding sub-server quantityα1、α2、α3 andαn, and combining the keysα1、α2、α3 andαn are respectively transmitted to the first sub-server, the second sub-server, the third sub-server and the fourth sub-server.
S6, according to the arrangement sequence, the keys in the first server are adopted in sequenceα1, encrypting the data packet information corresponding to the first-level random number by using the key in the second serverα2, encrypting the data packet information corresponding to the second-level random number by using the key in the third serverα3, encrypting the data packet information corresponding to the third-level random number by adopting the secret key in the fourth serverαAnd n, encrypting the data packet information corresponding to the fourth-level random number.
The encryption sequence starts from the first stage to the fourth stage and is encrypted step by step, corresponding to the last decryption process.
S7, the server generates an encryption key packet containing four key information and a decryption packet for decrypting the encryption key packet.
I.e. four keysα1. Secret keyα2. Secret keyα3 and secret keyαn further encrypting and packaging, decrypting the data package for decryption to obtain the secret keyα1. Secret keyα2. Secret keyα3 and secret keyαn。
S8, the server obtains the verification request of the receiving end through the encryption communication protocol or the self-defined communication protocol or the private communication protocol, and sends the encryption key data packet and the decryption data packet to the receiving end.
When the receiving end receives the encryption key data packet and the decryption data packet, the decryption operation is performed, which specifically includes:
t1, the receiving end receives the encryption key data packet and the decryption data packet sent by the server;
t2, decrypting the encrypted key data packet by using the decrypted data packet to obtain the keyα1. Secret keyα2. Secret keyα3 and secret keyαn；
T3, Using keysα1, decrypting to obtain an IP address of video data A1 in a first sub server corresponding to the first-level random number;
t4, Using keysα2, decrypting to obtain the IP address of the audio data A2 in the second sub server corresponding to the second-level random number;
t5, Using keysα3, decrypting to obtain the IP address of the picture data A3 in the third sub-server corresponding to the third-level random number;
the fourth sub-server releases the locked state if and only if the video data a1 in the first sub-server, the audio data a2 in the second sub-server, and the picture data A3 in the third sub-server are acquired in this order;
t6, Using keysαn, decryption is carried out to obtain a random sequence matrix W in a fourth sub-server corresponding to the fourth-level random numbernA stored IP address;
t7, according to the obtained random sequence matrix WnReading the nth data In each column In the matrix, and obtaining the sequencing position information Pn In the data packet with the total number of the nth sub-video transmission data packet, the IP address In of the nth sub-video transmission data packet, the data size Cn of the nth sub-video transmission data packet, the time information Tn of the nth sub-video transmission data packet and other attribute information Qn of the nth sub-video transmission data packet;
t8, obtaining the nth sub video transmission data packet according to the IP address In of the nth sub video transmission data packet;
and T9, repeating the steps T1-T8N-1 times, and combining N sub-video transmission data packets according to the sequence position of each sub-video transmission data packet to obtain the complete video stream data collected and transmitted by the unmanned aerial vehicle.
The invention disassembles and packs the video stream data based on the video stream data acquired by the unmanned aerial vehicle, and randomly extracts (not sequentially extracts) one of the sub-viewsA frequency transfer packet extracting part of video data a1, audio data a2 and picture data A3 therein; and the server correspondingly generates a random sequence matrix W containing the information of the sub-video transmission data packetnAnd responding to generate random numbers of four levels and four sub-servers corresponding to the four levels, wherein the four sub-servers are arranged and encrypted according to the levels, the current sub-server needs to be unlocked by adopting a key during decryption, the next sub-server starts an unlocking state, and the decryption can be continued by using the key, namely, the operations of multi-level encryption and decryption are adopted, and the sub-video transmission data packets are in a random sequence, so that the encryption level is further enhanced.
The server generates keys with corresponding number according to the number of the sub servers, and the keys are used for correspondingly decrypting the four sub servers in sequence and also need to be decrypted step by step.
And finally, the receiving end decrypts the encrypted key data packet according to the decrypted data packet to obtain keys for decrypting the four sub-servers.
In addition, the encryption level is further improved by the application in the random sequence matrix WnThe IP addresses and the arrangement sequence of the corresponding sub-video transmission data packets are hidden in the video playing system, each sub-video transmission data packet can be combined into complete video stream data to be played only after the information is obtained, if the arrangement sequences of a plurality of sub-video transmission data packets are different, the video playing system is judged to be illegal and cannot play the video, and if and only if the arrangement sequences of all the sub-video data packets are complete, the video playing system can play the video.
While the embodiments of the invention have been described in detail in connection with the accompanying drawings, it is not intended to limit the scope of the invention. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.
Claims (4)
1. An encryption and multi-stage calibration method for stream media of an unmanned aerial vehicle is characterized by comprising the following steps:
s1, acquiring video stream data acquired by the unmanned aerial vehicle;
s2, randomly decomposing the video stream data into N sub-video transmission data packets, and generating N random sequence matrixes W corresponding to the sub-video transmission data packetsnWherein N is less than or equal to N;
s3, randomly selecting one of the N sub-video transport packets, and randomly extracting partial video data a1, partial audio data a2, and partial picture data A3 in one sub-video transport packet;
s4, sending request verification to the server, responding and generating corresponding video data A1, audio data A2, picture data A3 and random sequence matrix WnA1, a2, a3 and an, and subjecting the random numbers a1, a2, a3 and an to random four-level sequencing, including a first-level random number, a second-level random number, a third-level random number and a fourth-level random number;
s5, the server divides the corresponding number of first sub-server, second sub-server, third sub-server and fourth sub-server according to the random number level number, and generates random key corresponding to the number response of sub-serverα1、α2、α3 andαn, and combining the keysα1、α2、α3 andαn is respectively transmitted to a first sub server, a second sub server, a third sub server and a fourth sub server;
s6, according to the arrangement sequence, the keys in the first server are adopted in sequenceα1, encrypting the data packet information corresponding to the first-level random number by using the key in the second serverα2, encrypting the data packet information corresponding to the second-level random number by using the key in the third serverα3, encrypting the data packet information corresponding to the third-level random number by adopting the secret key in the fourth serverαn, encrypting the data packet information corresponding to the fourth-level random number;
s7, the server generates an encryption key data packet containing four key information and a decryption data packet for decrypting the encryption key data packet;
s8, the server obtains the verification request of the receiving end through the encryption communication protocol or the self-defined communication protocol or the private communication protocol, and sends the encryption key data packet and the decryption data packet to the receiving end.
2. The encryption and multi-stage calibration method for UAV streaming media according to claim 1, wherein the random sequence matrix W in step S2 is a random sequence matrix WnComprises the following steps:
wherein Pn is the position of the N-th sub-video transmission data packet in the N sub-video transmission data packets in the sequence; in is the IP address of the nth sub-video transmission data packet; cn is the data size of the nth sub-video transmission data packet; tn is time information of an nth sub-video transmission data packet, including shooting time, ending time and accumulated time of the nth sub-video; qn is the other attribute of the nth sub-video transport packet.
3. The encryption and multi-stage verification method for UAV streaming media according to claim 2, wherein the step S4 is to send a request for verification to the server, and generate corresponding video data A1, audio data A2, picture data A3 and random sequence matrix W in responsenAnd the random numbers a1, a2, a3 and an are subjected to random four-level sequencing, including a first-level random number, a second-level random number, a third-level random number and a fourth-level random number, and the random numbers a1, a2, a3 and an include:
the first-level random number a1 corresponds to video data A1, the second-level random number a2 corresponds to audio data A2, the third-level random number A3 corresponds to picture data A3, and the fourth-level random number an corresponds to a random sequence matrix Wn。
4. The encryption and multi-stage calibration method for streaming media of unmanned aerial vehicle according to claim 3, further comprising:
t1, the receiving end receives the encryption key data packet and the decryption data packet sent by the server;
t2, decrypting the encrypted key data packet by using the decrypted data packet to obtain the keyα1. Secret keyα2. Secret keyα3 and secret keyαn；
T3, Using keysα1, decrypting to obtain an IP address of video data A1 in a first sub server corresponding to the first-level random number;
t4, Using keysα2, decrypting to obtain the IP address of the audio data A2 in the second sub server corresponding to the second-level random number;
t5, Using keysα3, decrypting to obtain the IP address of the picture data A3 in the third sub-server corresponding to the third-level random number;
the fourth sub-server releases the locked state if and only if the video data a1 in the first sub-server, the audio data a2 in the second sub-server, and the picture data A3 in the third sub-server are acquired in this order;
t6, Using keysαn, decryption is carried out to obtain a random sequence matrix W in a fourth sub-server corresponding to the fourth-level random numbernA stored IP address;
t7, according to the obtained random sequence matrix WnReading the nth data In each column In the matrix, and obtaining the sequencing position information Pn In the data packet with the total number of the nth sub-video transmission data packet, the IP address In of the nth sub-video transmission data packet, the data size Cn of the nth sub-video transmission data packet, the time information Tn of the nth sub-video transmission data packet and other attribute information Qn of the nth sub-video transmission data packet;
t8, obtaining the nth sub video transmission data packet according to the IP address In of the nth sub video transmission data packet;
and T9, repeating the steps T1-T8N-1 times, and combining N sub-video transmission data packets according to the sequence position of each sub-video transmission data packet to obtain the complete video stream data collected and transmitted by the unmanned aerial vehicle.
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| CN113783900A (en) | 2021-12-10 |
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