CN106254895A - A kind of for audio frequency and video Mp4 file encryption decryption system - Google Patents
A kind of for audio frequency and video Mp4 file encryption decryption system Download PDFInfo
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- CN106254895A CN106254895A CN201610578208.0A CN201610578208A CN106254895A CN 106254895 A CN106254895 A CN 106254895A CN 201610578208 A CN201610578208 A CN 201610578208A CN 106254895 A CN106254895 A CN 106254895A
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- encryption
- audio frequency
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
- H04N21/2347—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving video stream encryption
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
- H04N21/26613—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for generating or managing keys in general
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/4405—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving video stream decryption
Abstract
The invention discloses a kind of for audio frequency and video Mp4 file encryption decryption system, be provided with audio frequency and video Mp4 file encryption module, store module, audio frequency and video Mp4 file decryption module, views module, control module；The invention discloses the encryption and decryption approaches for audio frequency and video Mp4 file simultaneously.The present invention solves the problem that the most authorized direct copying of video file is play.Thus protect the copyright of teaching resource；This method is applied in technical ability comprehensive practical traning demonstration teaching software put into practice by motor and transformator, and effect is ideal.
Description
Technical field
The invention belongs to electronic technology field, particularly relate to a kind of for audio frequency and video Mp4 file encryption decryption system.
Background technology
Along with the development of Internet technology, network teaching resource is more and more abundanter, and wherein video resource is as long-distance video
The carrier of teaching, resource issue with share during, how to protect copyright to seem extremely important from technical standpoint.
Presently, there are the problem that the most authorized direct copying of video file is play.The copyright of teaching resource can not be protected.And
And the copyright of teaching resource can not get actual application in technical ability comprehensive practical traning demonstration teaching software put into practice by motor and transformator,
Effect is not ideal.
Summary of the invention
It is an object of the invention to provide a kind of for audio frequency and video Mp4 file encryption decryption system, it is intended to solve to deposit at present
In the problem that the most authorized direct copying of video file is play.The copyright of teaching resource can not be protected.And the version of teaching resource
Power can not get actual application in technical ability comprehensive practical traning demonstration teaching software put into practice by motor and transformator, and effect is less-than-ideal
Problem.
The present invention is achieved in that
A kind of for audio frequency and video Mp4 file encryption decryption system, this is used for audio frequency and video Mp4 file encryption decryption system and arranges
There is audio frequency and video Mp4 file encryption module, store module, file decryption module, views module, control module；
Audio frequency and video Mp4 file encryption module is connected with storing module, random by intubating length in the video file of source
Byte, the position of record insertion and byte length, position and the byte length information of insertion be recorded in key file, and will
The information of key file record is sent to store module,
Store module and be provided with data base, the key literary composition that data base sends for storing audio frequency and video Mp4 file encryption module
The information of part record；
Audio frequency and video Mp4 file decryption module is connected with storing module, for obtaining video from the data base storing module
The information of the key file record that file is corresponding, and the random character inserted in the video file after encryption is rejected, reduction regards
Frequency file；
Views module is connected with control module, is used for providing a user with operation interface, inputs video file to be encrypted
Address or directory path information and obtain audio frequency and video Mp4 fileinfo to be deciphered, be additionally operable to regarding after user plays deciphering
Frequency file；
Control module is connected with audio frequency and video Mp4 file encryption module and file decryption module, is used for receiving views module defeated
Enter adds confidential information and decryption information, and the information of acceptance is transferred to audio frequency and video Mp4 file encryption module and file decryption mould
Block.
Further, the encrypting and decrypting method for audio frequency and video Mp4 file encryption decryption system is: during encryption, views module
The address information of the video file that input is to be encrypted, then control module transmits video source to audio frequency and video Mp4 file encryption module
Fileinfo；During deciphering, views module obtains audio frequency and video Mp4 fileinfo to be deciphered, and passes to control module, control module
Reconnect audio frequency and video Mp4 file decryption module, complete deciphering, the video file after deciphering is played out in views module.
Further, encryption method specifically includes following steps:
Step one, definition random function funA, according to the length of video file, produce that some (x y), deposits to random integers
Enter to gather in S{}, and set S is saved in data base in the video file attributes field of correspondence, control to generate video-encryption
The Y value < 10 of file size；
Step 2, read video file stream by byte, according to the information of video file from data base, read the collection being stored in
Close S{}, obtain all randoms number pair；
Step 3, according to data to (x, y), the random string of X position in file stream write Y length, by file
In stream write encrypted video file stream；
Step 4, repetition step 3, until file read-write completes.
Further, decryption method includes:
1) defined function funB, obtains the information of key file record corresponding to video file from data base, resolves S{}
Set, obtains the random integers pair during encryption；
2) step 2 of reverse operating encryption method is to step 4, reads encrypted video file stream, after being written out to reduction
In video file.
Further,
Random function funA defined in step one, according to the length of video file, produces some to random integers (X, Y),
It is stored in set S{}, and set S is saved in data base in the video file attributes field of correspondence, specifically include:
The first step: obtain length L of video file, obtain initial parameter D from data base；
Second step: by L as the seed of random function, generate random number X, X < L, generate random number Y, Y < 10 simultaneously；
3rd step:<X, Y>being added in Map set S{}, then repeating the second, the three step until repeating D time；
4th step: Map set is saved in the black list that video file is corresponding.
Further, in step 2, read video file stream by byte, according to the information of video file from data base, read
Take the set S{} being stored in, obtain all randoms number pair, specifically include:
A, from video file preserve position in the way of file stream by byte read file, formed video file stream Fin；
B, by video file lengths information, the routing information before encryption and the routing information after encryption are saved in video file
In corresponding black list.
Further, in step 3 according to data to (x, y), the random character of X position in file stream write Y length
String, by file stream write encrypted video file stream, specifically includes:
A) traversal Map gathers S{}, obtains several to<X, Y>；
B) random function is utilized to generate the random string SKey of a length of Y；
C) routing information preserved according to file after encryption, generates file output stream Fout；
D) X position that SKey is inserted in Fout；
E) SKey is saved in encryption information table.
Further, step 1) defined in function funB, from data base, obtain the key file record that video file is corresponding
Information, particularly as follows: defined function funB, from data base, search adding of this document in black list according to the fileinfo read
Confidential information S{}, routing information Path and use random string SKey, thus obtain the key file note that video file is corresponding
The information of record.
Further, step 1) in S{} set resolving as follows:
(1) during, in reading database, the S{} of character string forms gathers string S；
(2), according to S go here and there in separator "；", the character string that character string is decomposed into "<x, y>" is saved in array A []
In；
(3), travel through array A [], and the character string in each unit is first removed "<" and ">" symbol, then root of head and the tail
According to ", " separator decompose " x, y " character string, x and the y value obtained is converted to integer, as EntryMap item Key=x,
Value=y, is saved in Map set M, and M is the set after decomposition, and the Entry item in M is the random integers after decomposition
Right.
The present invention is directed to MP4 video file be encrypted, deciphering, in the issuing process of Web application, utilize in data base
The key information preserved, after video-encryption, gives user with release process and uses, and user realizes when opening video playback solving
Close, design simple and practical；
The present invention solves the problem that the most authorized direct copying of video file is play.Thus protect the version of teaching resource
Power, the present invention is applied in technical ability comprehensive practical traning demonstration teaching software put into practice by motor and transformator, and effect is relatively
For ideal.Demonstration teaching software is presently operating in many middle duties, professorship, universities and colleges of undergraduate course, and software uses the present invention to be encrypted solution
The video resource of privacy protection demonstration lesson.
Accompanying drawing explanation
Fig. 1 is the encryption method flow chart for audio frequency and video Mp4 file encryption decryption system that the embodiment of the present invention provides；
Fig. 2 is the decryption method flow chart for audio frequency and video Mp4 file encryption decryption system that the embodiment of the present invention provides；
Fig. 3 be the embodiment of the present invention provide for audio frequency and video Mp4 file encryption decryption system schematic diagram；
In figure: 1, audio frequency and video Mp4 file encryption module；2, module is stored；3, audio frequency and video Mp4 file decryption module；4, regard
Module；5, control module.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with embodiment, to the present invention
It is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not used to
Limit the present invention.
Below in conjunction with the accompanying drawings the application principle of the present invention is further described.
Encrypting and decrypting method for audio frequency and video Mp4 file encryption decryption system is: during encryption, and views module input to add
The address information of close video file, then control module transmits video source fileinfo to audio frequency and video Mp4 file encryption module；
During deciphering, views module obtains audio frequency and video Mp4 fileinfo to be deciphered, and passes to control module, and control module reconnects sound
Video Mp4 file decryption module, completes deciphering, is played out in views module by the video file after deciphering.
As shown in Figure 1: encryption method comprises the following steps:
S101: definition random function funA, according to the length of video file, produce that some (x y), is stored in random integers
In set S{}, and set S is saved in data base in the video file attributes field of correspondence, controls to generate video-encryption literary composition
The Y value < 10 of part size；
S102: read video file stream by byte, according to the information of video file from data base, reads the set being stored in
S{}, obtains all randoms number pair；
S103: according to data to (x, y), the random string of the X position write Y length in file stream, by file stream
In write encrypted video file stream；
S104: repeat step 3, until file read-write completes.
As shown in Figure 2: decryption method includes:
S201: defined function funB, from data base, obtain the information of key file record corresponding to video file, resolve
S{} gathers, and obtains the random integers pair during encryption；
S202: the S102 to S104 of reverse operating encryption method, read encrypted video file stream, be written out to regarding after reduction
In frequency file.
Random function funA defined in step one, according to the length of video file, produces some to random integers (X, Y),
It is stored in set S{}, and set S is saved in data base in the video file attributes field of correspondence, specifically include:
The first step: obtain length L of video file, obtain initial parameter D from data base；
Second step: by L as the seed of random function, generate random number X, X < L, generate random number Y, Y < 10 simultaneously；
3rd step:<X, Y>being added in Map set S{}, then repeating the second, the three step until repeating D time；
4th step: Map set is saved in the black list that video file is corresponding.
In step 2, reading video file stream by byte, according to the information of video file from data base, reading is stored in
Set S{}, obtains all randoms number pair, specifically includes:
A, from video file preserve position in the way of file stream by byte read file, formed video file stream Fin；
B, by video file lengths information, the routing information before encryption and the routing information after encryption are saved in video file
In corresponding black list.
According to data to (x, y), the random string of the X position write Y length in file stream, by file in step 3
In stream write encrypted video file stream, specifically include:
A) traversal Map gathers S{}, obtains several to<X, Y>；
B) random function is utilized to generate the random string SKey of a length of Y；
C) routing information preserved according to file after encryption, generates file output stream Fout；
D) X position that SKey is inserted in Fout；
E) SKey is saved in encryption information table.
Step 1) defined in function funB, from data base, obtain the information of key file record corresponding to video file,
Particularly as follows: defined function funB, from data base, add confidential information S according to what the fileinfo read searched this document in black list
{ }, routing information Path and use random string SKey, thus obtain the letter of key file record corresponding to video file
Breath.
Step 1) in S{} set resolving as follows:
(1) during, in reading database, the S{} of character string forms gathers string S；
(2), according to S go here and there in separator "；", the character string that character string is decomposed into "<x, y>" is saved in array A []
In；
(3), travel through array A [], and the character string in each unit is first removed "<" and ">" symbol, then root of head and the tail
According to ", " separator decompose " x, y " character string, x and the y value obtained is converted to integer, as EntryMap item Key=x,
Value=y, is saved in Map set M, and M is the set after decomposition, and the Entry item in M is the random integers after decomposition
Right.
Decrypting process is contrary with ciphering process.
As shown in Figure 3: a kind of for audio frequency and video Mp4 file encryption decryption system, this is used for audio frequency and video Mp4 file encryption solution
Close system is provided with audio frequency and video Mp4 file encryption module 1, stores module 2, audio frequency and video Mp4 file decryption module 3；Views module
4, control module 5；
Audio frequency and video Mp4 file encryption module 1 is connected with storing module 2, random by intubating length in the video file of source
Byte, record insert position and byte length, position and the byte length information of insertion be recorded in key file, and
It is sent to the information of key file record store module,
Store module 2 and be provided with data base, the key literary composition that data base sends for storing audio frequency and video Mp4 file encryption module
The information of part record；
Audio frequency and video Mp4 file decryption module 3 is connected with storing module, for obtaining video from the data base storing module
The information of the key file record that file is corresponding, and the random character inserted in the video file after encryption is rejected, reduction regards
Frequency file.
Views module is connected with control module, is used for providing a user with operation interface, inputs video file to be encrypted
Address or directory path information and obtain audio frequency and video Mp4 fileinfo to be deciphered, be additionally operable to regarding after user plays deciphering
Frequency file；
Control module is connected with audio frequency and video Mp4 file encryption module and file decryption module, is used for receiving views module defeated
Enter adds confidential information and decryption information, and the information of acceptance is transferred to audio frequency and video Mp4 file encryption module and file decryption mould
Block.
The present invention is directed to MP4 video file be encrypted, deciphering, in the issuing process of Web application, utilize in data base
The key information preserved, after video-encryption, gives user with release process and uses, and user realizes when opening video playback solving
Close, design simple and practical；
The present invention solves the problem that the most authorized direct copying of video file is play.Thus protect the version of teaching resource
Power, the present invention is applied in technical ability comprehensive practical traning demonstration teaching software put into practice by motor and transformator, and effect is relatively
For ideal.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any amendment, equivalent and the improvement etc. made within god and principle, should be included within the scope of the present invention.
Claims (9)
1. one kind is used for audio frequency and video Mp4 file encryption decryption system, it is characterised in that this is used for audio frequency and video Mp4 file encryption solution
Close system is provided with audio frequency and video Mp4 file encryption module, stores module, file decryption module, views module, control module；
Audio frequency and video Mp4 file encryption module is connected with storing module, by the byte that intubating length in the video file of source is random,
The position of record insertion and byte length, recorded position and the byte length information of insertion in key file, and by key
The information of file record is sent to store module,
Store module and be provided with data base, the key file note that data base sends for storing audio frequency and video Mp4 file encryption module
The information of record；
Audio frequency and video Mp4 file decryption module is connected with storing module, for obtaining video file from the data base storing module
The information of corresponding key file record, and the random character inserted in the video file after encryption is rejected, reduction video literary composition
Part；
Views module is connected with control module, is used for providing a user with operation interface, inputs the address of video file to be encrypted
Or the audio frequency and video Mp4 fileinfo that directory path information is to be deciphered with acquisition, it is additionally operable to the literary composition of the video after user plays deciphering
Part；
Control module is connected with audio frequency and video Mp4 file encryption module and file decryption module, for receiving views module input
Add confidential information and decryption information, and the information of acceptance is transferred to audio frequency and video Mp4 file encryption module and file decryption module.
2. as claimed in claim 1 for audio frequency and video Mp4 file encryption decryption system, it is characterised in that for audio frequency and video Mp4
The encrypting and decrypting method of file encryption decryption system is: during encryption, the address letter of the video file that views module input is to be encrypted
Breath, then control module transmits video source fileinfo to audio frequency and video Mp4 file encryption module；During deciphering, views module obtains
Audio frequency and video Mp4 fileinfo to be deciphered, passes to control module, and control module reconnects audio frequency and video Mp4 file decryption module,
Complete deciphering, the video file after deciphering is played out in views module.
3. as claimed in claim 2 for audio frequency and video Mp4 file encryption decryption system, it is characterised in that encryption method is concrete
Comprise the following steps:
Step one, definition random function funA, according to the length of video file, produce that some (x y), is stored in collection to random integers
Close in S{}, and set S is saved in data base in the video file attributes field of correspondence, control to generate video-encryption file
The Y value < 10 of size；
Step 2, read video file stream by byte, according to the information of video file from data base, read the set S being stored in
{ }, obtains all randoms number pair；
Step 3, according to data to (x, y), the random string of X position in file stream write Y length, file stream is write
Enter in encrypted video file stream；
Step 4, repetition step 3, until file read-write completes.
4. as claimed in claim 2 for audio frequency and video Mp4 file encryption decryption system, it is characterised in that decryption method includes:
1) defined function funB, obtains the information of key file record corresponding to video file from data base, resolves S{} collection
Close, obtain the random integers pair during encryption；
2) step 2 of reverse operating encryption method is to step 4, reads encrypted video file stream, is written out to the video after reduction
In file.
5. as claimed in claim 3 for audio frequency and video Mp4 file encryption decryption system, it is characterised in that
Random function funA defined in step one, according to the length of video file, produces some to random integers (X, Y), is stored in
In set S{}, and set S is saved in data base in the video file attributes field of correspondence, specifically includes:
The first step: obtain length L of video file, obtain initial parameter D from data base；
Second step: by L as the seed of random function, generate random number X, X < L, generate random number Y, Y < 10 simultaneously；
3rd step:<X, Y>being added in Map set S{}, then repeating the second, the three step until repeating D time；
4th step: Map set is saved in the black list that video file is corresponding.
6. as claimed in claim 3 for audio frequency and video Mp4 file encryption decryption system, it is characterised in that in step 2, by word
Joint reads video file stream, according to the information of video file from data base, reads the set S{} being stored in, obtain all at random
Several right, specifically include:
A, from video file preserve position in the way of file stream by byte read file, formed video file stream Fin；
B, by video file lengths information, it is corresponding that the routing information before encryption and the routing information after encryption are saved in video file
Black list in.
7. as claimed in claim 3 for audio frequency and video Mp4 file encryption decryption system, it is characterised in that basis in step 3
Data are to (x, y), the random string of the X position write Y length in file stream, by file stream write encrypted video file stream
In, specifically include:
A) traversal Map gathers S{}, obtains several to<X, Y>；
B) random function is utilized to generate the random string SKey of a length of Y；
C) routing information preserved according to file after encryption, generates file output stream Fout；
D) X position that SKey is inserted in Fout；
E) SKey is saved in encryption information table.
8. as claimed in claim 4 for audio frequency and video Mp4 file encryption decryption system, it is characterised in that
Step 1) defined in function funB, from data base, obtain the information of key file record corresponding to video file, specifically
For defined function funB, from data base according to the fileinfo read search this document in black list add confidential information S{},
Routing information Path and use random string SKey, thus obtain the information of key file record corresponding to video file.
9. as claimed in claim 4 for audio frequency and video Mp4 file encryption decryption system, it is characterised in that
Step 1) in S{} set resolving as follows:
(1) during, in reading database, the S{} of character string forms gathers string S；
(2), according to S go here and there in separator "；" character string that character string is decomposed into "<x, y>" is saved in array A []；
(3), travel through array A [], and the character string in each unit is first removed "<" and ">" symbol, then basis of head and the tail
", " separator decomposes " x, y " character string, x and the y value obtained is converted to integer, as EntryMap item Key=x, value
=y, is saved in Map set M, and M is the set after decomposition, and the Entry item in M is the random integers pair after decomposition.
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| CN201610578208.0A CN106254895B (en) | 2016-07-21 | 2016-07-21 | One kind being used for audio-video Mp4 file encryption decryption system |
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| CN201610578208.0A CN106254895B (en) | 2016-07-21 | 2016-07-21 | One kind being used for audio-video Mp4 file encryption decryption system |
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