CN112040275A - Video encryption and decryption method - Google Patents
Video encryption and decryption method Download PDFInfo
- Publication number
- CN112040275A CN112040275A CN202010761451.2A CN202010761451A CN112040275A CN 112040275 A CN112040275 A CN 112040275A CN 202010761451 A CN202010761451 A CN 202010761451A CN 112040275 A CN112040275 A CN 112040275A
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- decryption
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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]
- H04N21/40—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
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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
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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]
- H04N21/40—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
- H04N21/4402—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 reformatting operations of video signals for household redistribution, storage or real-time display
Abstract
The invention relates to a video encryption and decryption method, which comprises the following steps: splitting video data into a plurality of sub-modules, naming the sub-modules respectively, encrypting the name of each sub-module, thereby disordering the front and back sequence of the sub-modules, and inserting characters with set length into each sub-module with an encrypted name to complete video encryption; the decryption method comprises the following steps: decrypting the name of each sub-module, sequencing the sub-modules according to the names, eliminating characters in the process, and sequentially writing the sequenced and character-eliminated sub-modules into an appointed file to finish video decryption. Compared with the prior art, the encryption and decryption process is quick, simple and convenient, short in time consumption and high in safety.
Description
Technical Field
The invention relates to the field of videos, in particular to a video encryption and decryption method.
Background
At present, the video encryption scheme has the disadvantages of more complicated encryption process and longer time consumption for encryption and decryption, so that some occasions are not applicable, for example, occasions requiring embedding video files in APP packages and having higher requirements on time consumption for decryption.
Disclosure of Invention
The present invention is directed to a video encryption and decryption method for overcoming the above-mentioned drawbacks of the prior art.
The purpose of the invention can be realized by the following technical scheme:
a method of video encryption, the method comprising the steps of:
step S1: splitting video data into a plurality of sub-modules;
step S2: naming the sub-modules respectively, and encrypting the name of each sub-module;
step S3: and inserting characters with set length into each sub-module with the encryption name to finish video encryption.
The size of the sub-module does not exceed 1M.
The name of each sub-module is encrypted using the MD5 code.
The set length is 1 byte.
The characters inserted by each sub-module are randomly extracted from the sub-module.
Each submodule inserts characters with set length at the appointed position.
The names are numerical numbers ordered according to a specific rule.
A decryption method for the video encryption method, the decryption method comprising the steps of:
step S101: decrypting the name of each sub-module;
step S102: sequencing the sub-modules according to names, and eliminating characters in the process;
step S103: and sequentially writing the plurality of sub-modules which are sequenced and the characters are removed into the appointed file to finish video decryption.
The decrypted video is loaded by the video decoder and the video file is immediately deleted.
Compared with the prior art, the invention has the following advantages:
(1) the video file is split into the sub-modules in the encryption process, so that quick confusion encryption is realized, the video is prevented from being stolen by unpacking by a third party after being packed, and the encryption process is quick, simple and convenient.
(2) After the decryption of the specific client is started, the sub-modules can be dynamically decrypted into a video file which can be played, and the decryption process only needs 0.5s, so that the user experience is not influenced, and meanwhile, the security is high.
(3) After the video decoder of the specific client decodes the video, the video file is immediately deleted, so that the video file is prevented from being stolen or copied in the playing process.
Drawings
FIG. 1 is a flow chart of an encryption method of the present invention;
FIG. 2 is a flowchart of a decryption method of the present invention;
fig. 3 is a schematic diagram of encryption and decryption according to the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Examples
The embodiment provides a video encryption method, which comprises the following steps:
step S1: splitting video data into a plurality of sub-modules;
step S2: naming the sub-modules respectively, and encrypting the name of each sub-module;
step S3: and inserting characters with set length into each sub-module with the encryption name to finish video encryption.
Specifically, the method comprises the following steps:
the size of the sub-module does not exceed 1M, and the length is set to be 1 byte.
The names are numbers sequenced according to specific rules, and the numbering rules can be 1-n conventional numbering schemes, or 1-2 x n-1 or other numbering schemes
The name of each submodule is encrypted by MD5 code, and the name of the submodule can be encrypted by other encryption modes only by recording the numbering and sequencing rule and the encryption mode.
The character inserted by each sub-module is randomly extracted from the sub-module and inserted into a set position.
The decryption method of the video encryption method comprises the following steps:
step S101: decrypting the name of each sub-module;
step S102: sequencing the sub-modules according to names, and eliminating characters in the process;
step S103: and sequentially writing the plurality of sub-modules which are sequenced and the characters are removed into the appointed file to finish video decryption.
The decrypted video is loaded by the video decoder and the video file is immediately deleted.
The using method comprises the following steps:
the encryption program carries out encryption and records the sequence of the names of the sub-modules, the decryption rules of the names of the sub-modules and the characters inserted by each sub-module; the decryption program decrypts according to the sequence of the sub-module names, the decryption rules of the sub-module names and the characters inserted by each sub-module; the decrypted video is loaded by a video decoder.
The encryption and decryption method of the embodiment has the following advantages:
the encrypted video sub-module names are subjected to confusion encryption, and the sub-module names are difficult to restore if the sequence of the sub-module names and the decryption rules of the sub-module names are not clear.
1 byte character is inserted into the specific area of the encrypted sub-modules, so that even if the sub-modules are combined and restored into a video file in sequence, the video file cannot be played normally.
The decryption process is the reverse process of encryption, decryption only needs to read a plurality of sub-modules and combines the sub-modules into a file, and compared with a conventional decryption scheme, the decryption mode is higher in speed.
The time-consuming operation of the encryption and decryption scheme is mainly the time-consuming operation of reading and writing the file, complex encryption and decryption operations are abandoned, and the time-consuming operation of encryption and decryption is greatly reduced. The time consumed for encrypting the 350M video file is about 1.4s, and the time consumed for decrypting the video file is about 0.5 s.
Claims (9)
1. A method for video encryption, the method comprising the steps of:
step S1: splitting video data into a plurality of sub-modules;
step S2: naming the sub-modules respectively, and encrypting the name of each sub-module;
step S3: and inserting characters with set length into each sub-module with the encryption name to finish video encryption.
2. A video encryption method according to claim 1, characterized in that said sub-module size does not exceed 1M.
3. A video encryption method according to claim 1, characterized in that the name of each sub-module is encrypted using MD5 code.
4. A video encryption method according to claim 1, wherein said set length is 1 byte.
5. A video encryption method according to claim 1, in which the characters inserted by each sub-module are randomly extracted from the sub-module.
6. The video encryption method of claim 1, wherein each sub-module inserts a character of a predetermined length at a predetermined position.
7. A video encryption method according to claim 1, characterized in that said names are numerical numbers ordered according to a specific rule.
8. A decryption method for the video encryption method according to any one of claims 1 to 7, characterized in that the decryption method comprises the steps of:
step S101: decrypting the name of each sub-module;
step S102: sequencing the sub-modules according to names, and eliminating characters in the process;
step S103: and sequentially writing the plurality of sub-modules which are sequenced and the characters are removed into the appointed file to finish video decryption.
9. A video decryption method according to claim 8, wherein the decrypted video is loaded by the video decoder and the video file is immediately deleted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010761451.2A CN112040275A (en) | 2020-07-31 | 2020-07-31 | Video encryption and decryption method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010761451.2A CN112040275A (en) | 2020-07-31 | 2020-07-31 | Video encryption and decryption method |
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| Publication Number | Publication Date |
|---|---|
| CN112040275A true CN112040275A (en) | 2020-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010761451.2A Pending CN112040275A (en) | 2020-07-31 | 2020-07-31 | Video encryption and decryption method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113014965A (en) * | 2021-03-03 | 2021-06-22 | 成都知了汇智科技有限公司 | Video processing method in TF card |
Citations (3)
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|---|---|---|---|---|
| US20050123136A1 (en) * | 2003-12-08 | 2005-06-09 | Daeyang Foundation | Motion picture file encryption method and digital rights management method using the same |
| CN106254895A (en) * | 2016-07-21 | 2016-12-21 | 重庆科技学院 | A kind of for audio frequency and video Mp4 file encryption decryption system |
| CN107547915A (en) * | 2017-10-23 | 2018-01-05 | 江苏省公用信息有限公司 | A kind of IPTV video contents tamper resistant method |
-
2020
- 2020-07-31 CN CN202010761451.2A patent/CN112040275A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050123136A1 (en) * | 2003-12-08 | 2005-06-09 | Daeyang Foundation | Motion picture file encryption method and digital rights management method using the same |
| CN106254895A (en) * | 2016-07-21 | 2016-12-21 | 重庆科技学院 | A kind of for audio frequency and video Mp4 file encryption decryption system |
| CN107547915A (en) * | 2017-10-23 | 2018-01-05 | 江苏省公用信息有限公司 | A kind of IPTV video contents tamper resistant method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113014965A (en) * | 2021-03-03 | 2021-06-22 | 成都知了汇智科技有限公司 | Video processing method in TF card |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: No.13, Lane 777, Guangzhong West Road, Jing'an District, Shanghai 200072 Applicant after: Shanghai magic Digital Creative Technology Co.,Ltd. Address before: No.13, Lane 777, Guangzhong West Road, Jing'an District, Shanghai 200072 Applicant before: MOTION MAGIC DIGITAL ENTERTAINMENT Inc. |
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| CB02 | Change of applicant information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201204 |
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| RJ01 | Rejection of invention patent application after publication |