CN105307054A - Inter cut prevention method for terrestrial digital television - Google Patents
Inter cut prevention method for terrestrial digital television Download PDFInfo
- Publication number
- CN105307054A CN105307054A CN201510718328.1A CN201510718328A CN105307054A CN 105307054 A CN105307054 A CN 105307054A CN 201510718328 A CN201510718328 A CN 201510718328A CN 105307054 A CN105307054 A CN 105307054A
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- China
- Prior art keywords
- beacon
- stream
- intercutting
- beacon stream
- timestamp
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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]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/854—Content authoring
- H04N21/8547—Content authoring involving timestamps for synchronizing content
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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
- H04N21/235—Processing of additional data, e.g. scrambling of additional data or processing content descriptors
- H04N21/2351—Processing of additional data, e.g. scrambling of additional data or processing content descriptors involving encryption of additional data
-
- 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
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
- H04N21/23614—Multiplexing of additional data and video streams
-
- 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
- H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
- H04N21/4353—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream involving decryption of additional data
-
- 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
- H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
- H04N21/4433—Implementing client middleware, e.g. Multimedia Home Platform [MHP]
-
- 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
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
- H04N21/4623—Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message]
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
- Databases & Information Systems (AREA)
- Computer Security & Cryptography (AREA)
- Software Systems (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses an inter cut prevention method for a terrestrial digital television. The inter cut prevention method comprises the following steps: a first step, a beacon flow generator in a transmitting terminal device obtains a standard UTC time through a built-in Beidou time service module at first, and then carries out signature and encryption processing on a timestamp to generate an inter cut prevention beacon flow based on a credible timestamp; a second step, a video multiplexer in the transmitting terminal device integrates the inter cut prevention beacon flow with other program beacon flows and then transmits the same to a receiving end terminal through a transmission link; and a third step, a set-top box in the receiving end terminal obtains the inter cut prevention beacon flow based on the credible timestamp, decrypts and verifies the inter cut prevention beacon flow based on the credible timestamp, compares a local system time with a decrypted and verified timestamp, if the time delay exceeds a preset threshold, the set-top box has an inter cut attack and stops playing; and otherwise, the set-top box normally plays the program. The inter cut prevention method for the terrestrial digital television disclosed by the invention is used for protecting the security of a communication network of the digital television and preventing inter cut of illegal signals.
Description
Technical field
The invention belongs to broadcasting and TV security protection applied technical field, be specifically related to the anti-inserting method of a kind of terrestrial DTV.
Background technology
Terrestrial DTV, as the chief component of China's radio and television, is one of outlying district resident's Main Means watching radio and television.The main object that terrestrial DTV covers be in suburb, mountain area, rural area, outlying ethnic mimority area and special areas where people of the minority nationalities live in compact communities.The geographical position particularity covered due to terrestrial DTV and unidirectional covering, there is weak link in terrestrial DTV network, provide opportunity for " lawless person " intercuts illegal contents in security protection.In recent years, the case of hindering and damaging and utilize broadcast facility illegally intercut of hostile force to radio and television happens occasionally, if ignore this problem, bring uncertain negative effect by the sound development of terrestrial DTV and the stable of national society undoubtedly.
Terrestrial DTV netting gear have cover wide, impact is large and the feature such as last one kilometer one-way wireless transmission, due to host-host protocol and standard open and clear, make it easily be subject to intercutting attack.
Summary of the invention
The safety problem that the present invention faces in view of terrestrial DTV, provides a kind of terrestrial DTV anti-inserting method, intercutting attack, improving safe broadcast supportability and the independently controlled ability of CHINA RFTCOM Co Ltd information security to effectively resisting malice.
To achieve these goals, the technical solution used in the present invention is:
The anti-inserting method of a kind of terrestrial DTV, comprises the following steps:
First beacon stream maker in step one, transmitting end equipment obtains the standard UTC time by built-in Big Dipper time service module, then signs and encryption to timestamp, generates and intercut beacon stream based on the anti-of trusted timestamp;
Video multiplexer in step 2, transmitting end equipment intercuts beacon stream and other program beacon stream by anti-, carries out system multiplexing, be then sent to receiving device by transmission link according to terrestrial DTV transmission flow multiplex specification;
Set Top Box in step 3, receiving device obtains and intercuts beacon stream based on the anti-of trusted timestamp, then to anti-content deciphering and the sign test of intercutting beacon stream, and contrast with the timestamp after local system time and deciphering and sign test, if time delay exceedes reservation threshold, then think and be subject to intercutting attack, stop playing; If time delay does not exceed reservation threshold, then normal play program.
Preferably, the step one beacon stream maker also comprised in transmitting end equipment extracts the key frame in program stream, signs and encryption, generate the anti-of content-based signature and intercut beacon stream key frame;
In step 2, video multiplexer in transmitting end equipment by intercutting beacon stream based on trusted timestamp anti-, the anti-of content-based signature intercuts beacon stream and other program beacon stream, carry out system multiplexing according to terrestrial DTV transmission flow multiplex specification, be then sent to receiving device by transmission link;
Step 4, anti-in receiving device is intercutted Authentication devices and obtains the anti-of content-based signature and intercut beacon stream, then to anti-content deciphering and the sign test of intercutting beacon stream, and utilize the information after sign test and take out frame program stream and carry out contrast verification, if contrast the number of times of makeing mistakes to exceed threshold values, then think and be subject to intercutting attack, stop broadcast program; If contrast the number of times of makeing mistakes not exceed threshold values, be then proved to be successful, broadcast program.
Preferably, in step 4, anti-in receiving device is intercutted Authentication devices and obtains simultaneously and intercut beacon stream based on the anti-of trusted timestamp, then to anti-content deciphering and the sign test of intercutting beacon stream, and the Big Dipper time service module utilizing receiving device to carry obtain standard the UTC time with deciphering and sign test after timestamp contrast, if time delay exceedes reservation threshold, then think and be subject to intercutting attack, stop playing; If time delay does not exceed reservation threshold, then broadcast program.
Preferably, the link transmission of transmitting end equipment and receiving device comprises wire transmission and wireless transmission, and the anti-Authentication devices that intercuts comprises wired anti-plug and broadcasts Authentication devices and wirelessly anti-ly intercut Authentication devices.
Preferably, described beacon stream maker is built in video multiplexer.
Preferably, when think be subject to intercutting attack time, by the equipment alarm of return link superior, and the program stream content of the current anti-information intercutted in beacon stream and equipment buffer memory is reported higher level equipment, for the further analysis intercutting attack.
Preferably, described beacon stream maker is external in video multiplexer.
Owing to have employed technique scheme, the invention has the beneficial effects as follows:
The anti-inserting method of a kind of terrestrial DTV of the present invention, lightweight security protection and comprehensive security protection can be divided into, wherein lightweight security protection, by superposing beacon stream maker and the Set Top Box with Security Middleware on original terrestrial digital television system basis, existing equipment need not be replaced, can be deployed in terrestrial digital television system rapidly, play the object of lightweight security protection, configuration be simple, convenient;
The present invention intercuts beacon stream by the generation two-way of novelty is anti-, terrestrial DTV wire transmission distribution network and wireless coverage net is played to the object of double protection.
Terrestrial DTV safety surface safety protecting method of the present invention, two-way is anti-to be intercutted beacon stream and anti-ly intercuts Authentication devices and wireless anti-intercutting on Authentication devices is verified wired respectively, the equipment that effectively reduces, to the anti-expense intercutting beacon flow verification, can reach the object that efficient verification prevents intercutting beacon stream.At the Authentication devices of wire transmission distribution network and wireless coverage network all with monitoring and alarming function, the effect of quick position and response fast can be played when occurring intercutting attack.
Accompanying drawing explanation
Fig. 1 is the anti-cut system structure chart of terrestrial DTV of embodiments of the invention 1.
Fig. 2 is the anti-inserting method flow chart of terrestrial DTV of embodiments of the invention 1.
Fig. 3 is the anti-cut system structure chart of terrestrial DTV of embodiments of the invention 2.
Fig. 4 is the anti-inserting method flow chart of terrestrial DTV of embodiments of the invention 2.
Fig. 5 is the verification method flow chart based on trusted timestamp beacon stream of the present invention.
Fig. 6 is the verification method flow chart of content-based signature beacon stream of the present invention.
Mark in figure: 10-video multiplexer, 21-is wired anti-intercuts that Authentication devices 22-is wireless anti-ly intercuts Authentication devices, 30-Set Top Box, 40-beacon stream maker.
Embodiment
Embodiment 1:
With reference to Fig. 1, Fig. 2, the anti-inserting method of a kind of terrestrial DTV, specifically adopts following steps:
First beacon stream maker 40 in step one, transmitting end equipment obtains the standard UTC time by built-in Big Dipper time service module, then signs and encryption to timestamp, generates and intercut beacon stream based on the anti-of trusted timestamp; Beacon stream maker 40 in transmitting end equipment extracts the key frame in program stream, signs and encryption to key frame, generates the anti-of content-based signature and intercuts beacon stream.The anti-beacon stream that intercuts mentioned in patent application document of the present invention refers to that the anti-TS that intercuts based on trusted timestamp or content signature flows, beacon stream maker 40 to generate the anti-equipment intercutting TS stream, TS stream is a kind of code stream of Moving Picture Experts Group-2, is a kind of communication protocol that audio-video signal and data use.Beacon stream maker 40 is built in video multiplexer 10, is therefore concrete mark in the drawings.
Video multiplexer 10 in step 2, transmitting end equipment by intercutting beacon stream based on trusted timestamp anti-, the anti-of content-based signature intercuts beacon stream and other program beacon stream, system multiplexing is carried out according to terrestrial DTV transmission flow multiplex specification, then receiving device is sent to by transmission link, transmission link comprises wired transmission links and wireless transmission link, and receiving device comprises Set Top Box 30, wiredly anti-intercut Authentication devices 21 and wirelessly anti-ly intercut Authentication devices 22.The Set Top Box 30 adopted in the present embodiment is high peace Set Top Box.
Set Top Box 30 in step 3, receiving device is obtained by wireless transmission link and intercuts beacon stream based on the anti-of trusted timestamp, then to anti-content deciphering and the sign test of intercutting beacon stream, and contrast with the timestamp after local system time and deciphering and sign test, if time delay exceedes reservation threshold, then think and be subject to intercutting attack, stop playing; If time delay does not exceed reservation threshold, then normal play program.
Step 4, wired anti-in receiving device is intercutted Authentication devices 21 and obtains the anti-of content-based signature by wired transmission links and intercut beacon stream, then to anti-content deciphering and the sign test of intercutting beacon stream, and utilize the information after sign test and take out frame program stream and carry out contrast verification, if contrast the number of times of makeing mistakes to exceed threshold values, then think and be subject to intercutting attack, stop broadcast program; If contrast the number of times of makeing mistakes not exceed threshold values, be then proved to be successful, broadcast program; Simultaneously, wireless anti-in receiving device is intercutted Authentication devices 22 and is obtained by wireless transmission link simultaneously and intercut beacon stream based on the anti-of trusted timestamp, then to anti-content deciphering and the sign test of intercutting beacon stream, and the Big Dipper time service module utilizing receiving device to carry obtain standard the UTC time with deciphering and sign test after timestamp contrast, if time delay exceedes reservation threshold, then think and be subject to intercutting attack, stop playing; If time delay does not exceed reservation threshold, then broadcast program.
When think be subject to intercutting attack time, by the equipment alarm of return link superior, and the program stream content of the current anti-information intercutted in beacon stream and equipment buffer memory is reported higher level equipment, for the further analysis intercutting attack.
Two-way is anti-to be intercutted beacon stream and anti-ly intercuts Authentication devices 21 and wireless anti-intercutting on Authentication devices 22 is verified wired respectively, effectively reduce the expense of equipment to beacon flow verification, the object of efficient verification beacon stream can be reached, realize the security protection of terrestrial DTV safety surface.
Embodiment 2:
With reference to Fig. 3, Fig. 4, the anti-inserting method of a kind of terrestrial DTV, specifically adopts following steps:
First beacon stream maker 40 in step one, transmitting end equipment obtains the standard UTC time by built-in Big Dipper time service module, then signs and encryption to timestamp, generates and intercut beacon stream based on the anti-of trusted timestamp.
Video multiplexer 10 in step 2, transmitting end equipment intercuts beacon stream and other program beacon stream by anti-, carries out system multiplexing, be then sent to receiving device by transmission link according to terrestrial DTV transmission flow multiplex specification.
Set Top Box 30 in step 3, receiving device obtains intercuts beacon stream based on the anti-of trusted timestamp, then to anti-content deciphering and the sign test of intercutting beacon stream, and contrast with the timestamp after local system time and deciphering and sign test, if time delay exceedes reservation threshold, then think and be subject to intercutting attack, stop playing; If time delay does not exceed reservation threshold, then normal play program.When think be subject to intercutting attack time, by the equipment alarm of return link superior, and the program stream content of the current anti-information intercutted in beacon stream and equipment buffer memory is reported higher level equipment, for the further analysis intercutting attack.The Set Top Box 30 of the employing in the present embodiment is can the Set Top Box of security of operation intermediate control.
Beacon stream maker 40 is external in video multiplexer 10, by superposing beacon stream maker 40 and the Set Top Box 30 with Security Middleware on original terrestrial digital television system basis, existing equipment need not be replaced, can be deployed in terrestrial digital television system rapidly, play the object of lightweight security protection, configuration is simple and convenient.
With reference to Fig. 5, the present invention includes the signature/sign test based on trusted timestamp beacon stream and enciphering/deciphering Principle of Process: video multiplexer 10 or the built-in Big Dipper time service module of beacon stream maker 40 obtain the UTC time of standard, with signature algorithm, the standard UTC time is signed, and by cryptographic algorithm by UTC time and signing messages encryption, generating ciphertext is encapsulated as the beacon stream based on timestamp, this beacon stream sent with cycle short period, be mainly used in the security protection of Replay Attack, main finger, records the program stream comprising beacon, and replace normal program stream information by illegal video information, launched by cell site again, prevent intercutting the beacon stream of verifying end acquisition based on trusted timestamp, comprise wire/wireless to prevent intercutting Authentication devices 22, high peace Set Top Box and the storage Set Top Box with Security Middleware, beacon stream is decrypted and sign test process, and the local zone time of UTC time of obtaining and verifying end after deciphering and sign test is done continuity judge, if time continuity hopping amplitude is larger, then think and be subject to Replay Attack, stop playing.
Shown in Fig. 6, the present invention includes the content-based generation of signature beacon stream and the principle of proof procedure: the key frame in safe multiplexer extraction program stream or bag, with signature algorithm to key frame or package informatin signature, and by cryptographic algorithm by the key frame of signing messages and extraction or package informatin encryption, generating ciphertext is encapsulated as the beacon stream of content-based signature, this beacon stream sends immediately following the program stream taking out frame, for carrying out real-time protection to video streaming content; Prevent intercutting the beacon stream that verifying end obtains content-based signature, comprise wire/wireless to prevent intercutting Authentication devices 22, beacon stream is decrypted and sign test process, and the information obtained after deciphering and sign test and the program stream taking out frame are carried out real time contrast, if contrast the number of times of makeing mistakes to exceed certain threshold values, then think and be subject to intercutting attack, by the equipment alarm of return link superior, and the program stream content of the information in present beacon stream and equipment buffer memory is reported higher level equipment, for the further analysis intercutting attack.
Claims (7)
1. the anti-inserting method of terrestrial DTV, is characterized in that, comprise the following steps:
First beacon stream maker in step one, transmitting end equipment obtains the standard UTC time by built-in Big Dipper time service module, then signs and encryption to timestamp, generates and intercut beacon stream based on the anti-of trusted timestamp;
Video multiplexer in step 2, transmitting end equipment intercuts beacon stream and other program beacon stream by anti-, carries out system multiplexing, be then sent to receiving device by transmission link according to terrestrial DTV transmission flow multiplex specification;
Set Top Box in step 3, receiving device obtains and intercuts beacon stream based on the anti-of trusted timestamp, then to anti-content deciphering and the sign test of intercutting beacon stream, and contrast with the timestamp after local system time and deciphering and sign test, if time delay exceedes reservation threshold, then think and be subject to intercutting attack, stop playing; If time delay does not exceed reservation threshold, then normal play program.
2. the anti-inserting method of terrestrial DTV according to claim 1, it is characterized in that, the step one beacon stream maker also comprised in transmitting end equipment extracts the key frame in program stream, signs and encryption, generate the anti-of content-based signature and intercut beacon stream key frame;
In step 2, video multiplexer in transmitting end equipment by intercutting beacon stream based on trusted timestamp anti-, the anti-of content-based signature intercuts beacon stream and other program beacon stream, carry out system multiplexing according to terrestrial DTV transmission flow multiplex specification, be then sent to receiving device by transmission link;
Step 4, anti-in receiving device is intercutted Authentication devices and obtains the anti-of content-based signature and intercut beacon stream, then to anti-content deciphering and the sign test of intercutting beacon stream, and utilize the information after sign test and take out frame program stream and carry out contrast verification, if contrast the number of times of makeing mistakes to exceed threshold values, then think and be subject to intercutting attack, stop broadcast program; If contrast the number of times of makeing mistakes not exceed threshold values, be then proved to be successful, broadcast program.
3. the anti-inserting method of terrestrial DTV according to claim 2, it is characterized in that, in step 4, anti-in receiving device is intercutted Authentication devices and obtains simultaneously and intercut beacon stream based on the anti-of trusted timestamp, then to anti-content deciphering and the sign test of intercutting beacon stream, and the Big Dipper time service module utilizing receiving device to carry UTC time of obtaining standard with to decipher and timestamp after sign test contrasts, if time delay exceedes reservation threshold, then think and be subject to intercutting attack, stop playing; If time delay does not exceed reservation threshold, then broadcast program.
4. the anti-inserting method of the terrestrial DTV according to Claims 2 or 3, it is characterized in that, the link transmission of transmitting end equipment and receiving device comprises wire transmission and wireless transmission, and the anti-Authentication devices that intercuts comprises wired anti-plug and broadcasts Authentication devices and wirelessly anti-ly intercut Authentication devices.
5. the anti-inserting method of the terrestrial DTV according to Claims 2 or 3, is characterized in that, described beacon stream maker is built in video multiplexer.
6. the anti-inserting method of terrestrial DTV according to claim 1,2 or 3, it is characterized in that, when think be subject to intercutting attack time, by the equipment alarm of return link superior, and the program stream content of the current anti-information intercutted in beacon stream and equipment buffer memory is reported higher level equipment, for the further analysis intercutting attack.
7. the anti-inserting method of terrestrial DTV according to claim 1, is characterized in that, described beacon stream maker is external in video multiplexer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510718328.1A CN105307054B (en) | 2015-10-28 | 2015-10-28 | A kind of anti-inserting method of terrestrial DTV |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510718328.1A CN105307054B (en) | 2015-10-28 | 2015-10-28 | A kind of anti-inserting method of terrestrial DTV |
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| CN105307054A true CN105307054A (en) | 2016-02-03 |
| CN105307054B CN105307054B (en) | 2018-06-08 |
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| CN201510718328.1A Expired - Fee Related CN105307054B (en) | 2015-10-28 | 2015-10-28 | A kind of anti-inserting method of terrestrial DTV |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107295363A (en) * | 2017-07-31 | 2017-10-24 | 成都三零凯天通信实业有限公司 | A kind of System and method for for preventing intercutting suitable for digital television system |
| CN108777688A (en) * | 2018-06-07 | 2018-11-09 | 中国联合网络通信集团有限公司 | Video security monitoring method and system |
| CN108848413A (en) * | 2018-06-25 | 2018-11-20 | 苏州科达科技股份有限公司 | Anti-replay-attack system, method, apparatus and the storage medium of video |
| CN111711863A (en) * | 2020-06-29 | 2020-09-25 | 北京数码视讯科技股份有限公司 | Method and device for preventing program insertion, electronic equipment and storage medium |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105307054B (en) | 2018-06-08 |
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