CN103491384A - Encrypting method and device of video and decrypting method and device of video - Google Patents

Encrypting method and device of video and decrypting method and device of video Download PDF

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Publication number
CN103491384A
CN103491384A CN201310407702.7A CN201310407702A CN103491384A CN 103491384 A CN103491384 A CN 103491384A CN 201310407702 A CN201310407702 A CN 201310407702A CN 103491384 A CN103491384 A CN 103491384A
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China
Prior art keywords
encrypted
encryption
video file
feature information
vector value
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CN201310407702.7A
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Chinese (zh)
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CN103491384B (en
Inventor
赵猛
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TVMining Beijing Media Technology Co Ltd
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TVMining Beijing Media Technology Co Ltd
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Abstract

The invention discloses an encrypting method and device of a video and a decrypting method and device of the video. The encrypting method includes the steps that a video file is encrypted, an encrypted video file is formed, and encrypted feature information is obtained; the encrypted feature information is written into the encrypted video file, and the encrypted video file including the encrypted feature information is formed. According to the technical scheme, the video file can be encrypted in one operation system, the video file can be obtained through decryption in the other operation system, therefore, a legal user can accurately share a video in time, and efficiency is improved.

Description

A kind of encryption method of video and device and decryption method and device
Technical field
The present invention relates to technical field of video processing, relate in particular to a kind of encryption method and device and decryption method and device of video.
Background technology
Fast development along with mobile communication network technology; the particularly extensive use of mobile phone, personal digital assistant; the user need to preserve more and more with the video information exchanged; make the safety problem of video information more highlight; enjoying in video communication technology offers convenience, the safety issue of protection individual privacy also more and more is subject to people's attention.
At present, by video file being encrypted to reduce video information, may be caused the possibility of divulging a secret by unauthorized access, thereby improve the fail safe of video information.Yet in decrypting process, because the characteristic of operating system can cause that the file decryption that uses same cryptographic algorithm to encrypt is out inconsistent, for example video file A is encrypted for 1 time and obtains encrypted video file B in operating system, this encrypted video file B is decrypted for 1 time and can accesses video file A in operating system, yet this encrypted video file B is decrypted for 2 times in operating system, may decipher and can not get video file A, make like this validated user can't obtain video file (the validated user deciphering can not get video file A) accurately, validated user can not be shared this video timely and accurately, bring inconvenience to validated user.
In sum, how to solve encrypted video file under a kind of operating system, can decipher under another kind of operating system and obtain this video file and become at present technical problem urgently to be resolved hurrily.
Summary of the invention
The embodiment of the present invention provides a kind of encryption method and device and decryption method and device of video, for realizing encrypted video file under a kind of operating system, can decipher under another kind of operating system and obtain this video file.
One aspect of the present invention, proposed a kind of encryption method of video, comprising:
Video file is encrypted to operation, forms encrypted video file, and obtain encrypted feature information;
Described encrypted feature information is write in encrypted video file, form the encrypted video file that comprises described encrypted feature information.
Extract encrypted feature information in the embodiment of the present invention when video file encryption, and encrypted feature information is write in encrypted video file, when the enabling decryption of encrypted video file, utilize encrypted feature information to be decrypted, can realize encrypted video file under a kind of operating system, can decipher and obtain this video file under another kind of operating system, thereby make validated user sharing video frequency timely and accurately, improve efficiency.
As technique scheme preferably, described encrypted feature information comprises: one or more in the Hash operation message authentication code of the operation result again of the initial vector value of the initial vector value of cipher mode, encrypted version this shop, encryption, the pilot process information of encryption, encryption and the pilot process of encryption, the cryptographic Hash of key computing and key.
As technique scheme preferably, described described encrypted feature information is write in encrypted video file, form the encrypted video file that comprises described encrypted feature information, comprising:
Described encrypted feature information is write in encrypted video file with the information format of presetting, form the encrypted video file that comprises described encrypted feature information.
In this programme, can for example, according to user's demand the security level required of encrypted video file (, to) encrypted feature information be write in encrypted video file with the information format of presetting.
As technique scheme preferably, described encrypted feature information comprises: the operation result again of the initial vector value of the initial vector value of cipher mode, encrypted version this shop, encryption, the pilot process information of encryption, encryption and the pilot process of encryption, the cryptographic Hash of key computing and the Hash operation message authentication code of key;
Described described encrypted feature information is write in encrypted video file with the information format of presetting, comprising:
The Hash operation message authentication code of the cryptographic Hash of the operation result again of the pilot process of the initial vector value of the pilot process information of the initial vector value of cipher mode, encrypted version this shop, encryption, encryption, encryption and encryption, key computing and key is stored in encrypted video file with preset field size and preset order.
Accordingly, the present invention proposes a kind of decryption method of video, comprising:
Extract encrypted feature information from the encrypted video file that comprises encrypted feature information;
Utilize described encrypted feature information to be decrypted encrypted video file.
As technique scheme preferably, described encrypted feature information comprises: one or more in the Hash operation message authentication code of the operation result again of the initial vector value of the initial vector value of cipher mode, encrypted version this shop, encryption, the pilot process information of encryption, encryption and the pilot process of encryption, the cryptographic Hash of key computing and key.
Another aspect of the present invention, proposed a kind of encryption device of video, comprising:
Processing module, for video file is encrypted to operation, form encrypted video file, and obtain encrypted feature information;
Writing module, for described encrypted feature information is write to encrypted video file, form the encrypted video file that comprises described encrypted feature information.
As technique scheme preferably, the said write module comprises:
Writing unit, for described encrypted feature information is write to encrypted video file with the information format of presetting, form the encrypted video file that comprises described encrypted feature information.
As technique scheme preferably, the said write unit comprises:
Write subelement, for when described encrypted feature information, comprising cipher mode, encrypted version this shop, the initial vector value of encrypting, the pilot process information of encrypting, the operation result again of the initial vector value of encrypting and the pilot process of encryption, during the Hash operation message authentication code of the cryptographic Hash of key computing and key, by cipher mode, encrypted version this shop, the initial vector value of encrypting, the pilot process information of encrypting, the operation result again of the initial vector value of encrypting and the pilot process of encryption, the Hash operation message authentication code of the cryptographic Hash of key computing and key is stored in encrypted video file with preset field size and preset order.
Accordingly, the present invention proposes a kind of decryption device of video, comprising:
Extraction module, extract encrypted feature information for the encrypted video file from comprising encrypted feature information;
Deciphering module, be decrypted encrypted video file for utilizing described encrypted feature information.
Extract encrypted feature information in the embodiment of the present invention when video file encryption, and encrypted feature information is write in encrypted video file, when the enabling decryption of encrypted video file, utilize encrypted feature information to be decrypted, can realize encrypted video file under a kind of operating system, can decipher and obtain this video file under another kind of operating system, thereby make validated user sharing video frequency timely and accurately, improve efficiency.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, or understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification write, claims and accompanying drawing.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
The accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms the part of specification, for explaining the present invention, is not construed as limiting the invention together with embodiments of the present invention.In the accompanying drawings:
The encryption main method flow chart that Fig. 1 is video in the embodiment of the present invention;
The deciphering main method flow chart that Fig. 2 is video in the embodiment of the present invention;
Fig. 3 is encryption method and the decryption method flow chart of video in the application embodiment of the present invention;
The primary structure schematic diagram of the encryption device that Fig. 4 is video in the embodiment of the present invention;
The primary structure schematic diagram of the decryption device that Fig. 5 is video in the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein, only for description and interpretation the present invention, is not intended to limit the present invention.
In decrypting process, because the characteristic of operating system can cause that the file decryption that uses same cryptographic algorithm to encrypt is out inconsistent, the embodiment of the present invention can realize encrypted video file under a kind of operating system, can decipher under another kind of operating system and obtain this video file, thereby make validated user sharing video frequency timely and accurately, improved efficiency.
Be illustrated in figure 1 the encryption main method flow process of video in the embodiment of the present invention, comprise the following steps 11-12:
Step 11, video file is encrypted to operation, forms encrypted video file, and obtain encrypted feature information.
Preferably, encrypted feature information comprises: one or more in the Hash operation message authentication code of the operation result again of the initial vector value of the initial vector value of cipher mode, encrypted version this shop, encryption, the pilot process information of encryption, encryption and the pilot process of encryption, the cryptographic Hash of key computing and key.
The basic process of data encryption is exactly to being that file or data are expressly processed by certain algorithm originally; make it become unreadable one section code; be commonly referred to " ciphertext "; make it just can demonstrate original content after the corresponding key of input, by such approach, reach the purpose that protected data is not stolen, read by juridical-person.The inverse process of this process is deciphering, is about to the process that this coded message is converted into its original data.The common encryption algorithm has: DES(Data Encryption Standard, data encryption standard) be symmetry algorithm, speed, be applicable to encrypt the occasion of mass data; 3DES(Triple DES) be based on the symmetry algorithm of DES, a blocks of data carried out to three times with three different keys and encrypt, intensity is higher; IDEA(International Data Encryption Algorithm, IDEA), use 128 keys that very strong fail safe is provided; DSA(Digital Signature Algorithm, Digital Signature Algorithm), be a kind of DSS(DSS of standard) and, do not include strictly speaking cryptographic algorithm; AES(Advanced Encryption Standard, Advanced Encryption Standard), be symmetry algorithm, follow-on cryptographic algorithm standard, speed is fast, and level of security is high, and a realization of AES standard is the Rijndael of Lai En Dell algorithm now.Certainly, the cryptographic algorithm that the embodiment of the present invention is encrypted the operation use to video file is not limited to above several cryptographic algorithm.
Step 12, encrypted feature information is write in encrypted video file, form the encrypted video file that comprises encrypted feature information.
Preferably, step 12 can comprise the following steps A:
Steps A, encrypted feature information is write in encrypted video file with the information format of presetting, form the encrypted video file that comprises encrypted feature information.
Can for example, according to user's demand the security level required of encrypted video file (, to) encrypted feature information be write in encrypted video file with the information format of presetting.
Wherein, preferably, when the Hash operation message authentication code of the cryptographic Hash of the operation result again of the pilot process of the initial vector value of the pilot process information of the encrypted feature information initial vector value that is cipher mode, encrypted version this shop, encryption, encryption, encryption and encryption, key computing and key, above-mentioned steps A can comprise the following steps B:
Step B, the Hash operation message authentication code of the cryptographic Hash of the operation result again of the pilot process of the initial vector value of the pilot process information of the initial vector value of cipher mode, encrypted version this shop, encryption, encryption, encryption and encryption, key computing and key is stored in encrypted video file with preset field size and preset order.
For example, the Hash operation message authentication code of the cryptographic Hash of the operation result again of the pilot process of the initial vector value of the pilot process information of the initial vector value of cipher mode, encrypted version this shop, encryption, encryption, encryption and encryption, key computing and key is stored in encrypted video file with the fixed field size order.
Accordingly, be illustrated in figure 2 the deciphering main method flow process of video in the embodiment of the present invention, comprise the following steps 21-22:
Step 21, extract encrypted feature information from the encrypted video file that comprises encrypted feature information.
Preferably, encrypted feature information comprises: one or more in the Hash operation message authentication code of the operation result again of the initial vector value of the initial vector value of cipher mode, encrypted version this shop, encryption, the pilot process information of encryption, encryption and the pilot process of encryption, the cryptographic Hash of key computing and key.
Step 22, utilize encrypted feature information to be decrypted encrypted video file.
Extract encrypted feature information in the embodiment of the present invention when video file encryption, and encrypted feature information is write in encrypted video file, when the enabling decryption of encrypted video file, utilize encrypted feature information to be decrypted, can realize encrypted video file under a kind of operating system, can decipher and obtain this video file under another kind of operating system, thereby make validated user sharing video frequency timely and accurately, improve efficiency.
Introduce in detail below by an embodiment technical scheme that the embodiment of the present invention provides.
This embodiment can be applicable to such a scene: the user is encrypted operation to video file A on computers, obtain encrypted video file B, then the user copies this encrypted video file B on mobile phone to, need to be decrypted and obtain video file A, and play this video file A, as shown in Figure 3, the method comprises the following steps:
Step 301, computer are encrypted operation to video file A, form encrypted video file B, and obtain encrypted feature information, the operation result again of the initial vector value of the initial vector value that this encrypted feature information is cipher mode, encrypted version this shop, encryption, the pilot process information of encryption, encryption and the pilot process of encryption, the cryptographic Hash of key computing and the Hash operation message authentication code of key.
Step 302, computer are stored in above-mentioned encrypted feature information in encrypted video file with the fixed field size order, form the encrypted video file B that comprises encrypted feature information.
For example, 1-3 bytes store cipher mode in encrypted video file, 4-6 bytes store encrypted version this shop, the initial vector value that the 7-10 bytes store is encrypted, the pilot process information that the 11-16 bytes store is encrypted, the operation result again of the initial vector value that the 17-32 bytes store is encrypted and the pilot process of encryption, the cryptographic Hash of 33-64 bytes store key computing, and the Hash operation message authentication code of 65-128 bytes store key.
Step 303, mobile phone obtain the encrypted video file B that comprises encrypted feature information from computer.
Step 304, mobile phone extract encrypted feature information from the encrypted video file B that comprises encrypted feature information, the operation result again of the initial vector value of the initial vector value that this encrypted feature information is cipher mode, encrypted version this shop, encryption, the pilot process information of encryption, encryption and the pilot process of encryption, the cryptographic Hash of key computing and the Hash operation message authentication code of key.
Step 305, mobile phone utilize above-mentioned encrypted feature information to be decrypted encrypted video file B, and deciphering obtains video file A.
Step 306, mobile phone playing video file A.
In this embodiment, the user is encrypted video file A on computers, can decipher on mobile phone and obtain video file A, and then can play this video file, thereby make validated user sharing video frequency timely and accurately, has improved efficiency.
It should be noted that, in practical application, above-mentioned all optional execution modes can adopt the mode combination in any of combination, form optional embodiment of the present invention, and this is no longer going to repeat them.
More than described encryption method and the decryption method implementation procedure of video, this process can be realized by device, below built-in function and the structure of device is introduced.
Based on same inventive concept, as shown in Figure 4, in the embodiment of the present invention, the encryption device of video comprises: processing module 401 and writing module 402.
Processing module 401, for video file is encrypted to operation, form encrypted video file, and obtain encrypted feature information;
Writing module 402, for encrypted feature information is write to encrypted video file, form the encrypted video file that comprises encrypted feature information.
Preferably, encrypted feature information comprises: one or more in the Hash operation message authentication code of the operation result again of the initial vector value of the initial vector value of cipher mode, encrypted version this shop, encryption, the pilot process information of encryption, encryption and the pilot process of encryption, the cryptographic Hash of key computing and key.
Preferably, above-mentioned writing module 402 can comprise:
Writing unit, for encrypted feature information is write to encrypted video file with the information format of presetting, form the encrypted video file that comprises encrypted feature information.
Preferably, above-mentioned writing unit can comprise:
Write subelement, for when encrypted feature information, comprising cipher mode, encrypted version this shop, the initial vector value of encrypting, the pilot process information of encrypting, the operation result again of the initial vector value of encrypting and the pilot process of encryption, during the Hash operation message authentication code of the cryptographic Hash of key computing and key, by cipher mode, encrypted version this shop, the initial vector value of encrypting, the pilot process information of encrypting, the operation result again of the initial vector value of encrypting and the pilot process of encryption, the Hash operation message authentication code of the cryptographic Hash of key computing and key is stored in encrypted video file with preset field size and preset order.
Accordingly, as shown in Figure 5, in the embodiment of the present invention, the decryption device of video comprises: extraction module 501 and deciphering module 502.
Extraction module 501, extract encrypted feature information for the encrypted video file from comprising encrypted feature information;
Deciphering module 502, be decrypted encrypted video file for utilizing encrypted feature information.
Preferably, encrypted feature information comprises: one or more in the Hash operation message authentication code of the operation result again of the initial vector value of the initial vector value of cipher mode, encrypted version this shop, encryption, the pilot process information of encryption, encryption and the pilot process of encryption, the cryptographic Hash of key computing and key.
Extract encrypted feature information in the embodiment of the present invention when video file encryption, and encrypted feature information is write in encrypted video file, when the enabling decryption of encrypted video file, utilize encrypted feature information to be decrypted, can realize encrypted video file under a kind of operating system, can decipher and obtain this video file under another kind of operating system, thereby make validated user sharing video frequency timely and accurately, improve efficiency.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, implement software example or in conjunction with the form of the embodiment of software and hardware aspect fully.And the present invention can adopt the form that wherein includes the upper computer program of implementing of computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) of computer usable program code one or more.
The present invention describes with reference to flow chart and/or the block diagram of method, equipment (system) and computer program according to the embodiment of the present invention.Should understand can be in computer program instructions realization flow figure and/or block diagram each flow process and/or the flow process in square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce for realizing the device in the function of flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction be stored in this computer-readable memory produce the manufacture that comprises command device, this command device is realized the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, make and carry out the sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out on computer or other programmable devices is provided for realizing the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.

Claims (10)

1. the encryption method of a video, is characterized in that, comprising:
Video file is encrypted to operation, forms encrypted video file, and obtain encrypted feature information;
Described encrypted feature information is write in encrypted video file, form the encrypted video file that comprises described encrypted feature information.
2. encryption method as claimed in claim 1, it is characterized in that, described encrypted feature information comprises: one or more in the Hash operation message authentication code of the operation result again of the initial vector value of the initial vector value of cipher mode, encrypted version this shop, encryption, the pilot process information of encryption, encryption and the pilot process of encryption, the cryptographic Hash of key computing and key.
3. encryption method as claimed in claim 1, is characterized in that, described described encrypted feature information write in encrypted video file, forms the encrypted video file that comprises described encrypted feature information, comprising:
Described encrypted feature information is write in encrypted video file with the information format of presetting, form the encrypted video file that comprises described encrypted feature information.
4. encryption method as claimed in claim 3, is characterized in that,
Described encrypted feature information comprises: the operation result again of the initial vector value of the initial vector value of cipher mode, encrypted version this shop, encryption, the pilot process information of encryption, encryption and the pilot process of encryption, the cryptographic Hash of key computing and the Hash operation message authentication code of key;
Described described encrypted feature information is write in encrypted video file with the information format of presetting, comprising:
The Hash operation message authentication code of the cryptographic Hash of the operation result again of the pilot process of the initial vector value of the pilot process information of the initial vector value of cipher mode, encrypted version this shop, encryption, encryption, encryption and encryption, key computing and key is stored in encrypted video file with preset field size and preset order.
5. the decryption method of a video, is characterized in that, comprising:
Extract encrypted feature information from the encrypted video file that comprises encrypted feature information;
Utilize described encrypted feature information to be decrypted encrypted video file.
6. decryption method as claimed in claim 5, it is characterized in that, described encrypted feature information comprises: one or more in the Hash operation message authentication code of the operation result again of the initial vector value of the initial vector value of cipher mode, encrypted version this shop, encryption, the pilot process information of encryption, encryption and the pilot process of encryption, the cryptographic Hash of key computing and key.
7. the encryption device of a video, is characterized in that, comprising:
Processing module, for video file is encrypted to operation, form encrypted video file, and obtain encrypted feature information;
Writing module, for described encrypted feature information is write to encrypted video file, form the encrypted video file that comprises described encrypted feature information.
8. encryption device as claimed in claim 7, is characterized in that, the said write module comprises:
Writing unit, for described encrypted feature information is write to encrypted video file with the information format of presetting, form the encrypted video file that comprises described encrypted feature information.
9. encryption device as claimed in claim 8, is characterized in that, the said write unit comprises:
Write subelement, for when described encrypted feature information, comprising cipher mode, encrypted version this shop, the initial vector value of encrypting, the pilot process information of encrypting, the operation result again of the initial vector value of encrypting and the pilot process of encryption, during the Hash operation message authentication code of the cryptographic Hash of key computing and key, by cipher mode, encrypted version this shop, the initial vector value of encrypting, the pilot process information of encrypting, the operation result again of the initial vector value of encrypting and the pilot process of encryption, the Hash operation message authentication code of the cryptographic Hash of key computing and key is stored in encrypted video file with preset field size and preset order.
10. the decryption device of a video, is characterized in that, comprising:
Extraction module, extract encrypted feature information for the encrypted video file from comprising encrypted feature information;
Deciphering module, be decrypted encrypted video file for utilizing described encrypted feature information.
CN201310407702.7A 2013-09-09 2013-09-09 Encrypting method and device of video and decrypting method and device of video Expired - Fee Related CN103491384B (en)

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