CN1953538A - A method to identify the effectiveness of certificate of cable card in cable digital TV - Google Patents
A method to identify the effectiveness of certificate of cable card in cable digital TV Download PDFInfo
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- CN1953538A CN1953538A CN 200510031036 CN200510031036A CN1953538A CN 1953538 A CN1953538 A CN 1953538A CN 200510031036 CN200510031036 CN 200510031036 CN 200510031036 A CN200510031036 A CN 200510031036A CN 1953538 A CN1953538 A CN 1953538A
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Abstract
The invention relates to a method for judging if the certificate of wire card is effective in wire digit TV. Wherein, it is characterized in that: when said wire card inputs certificate text, and in effective period, if the system time table is in the system information sent from cable top device, uses said system time list to input the system time of cable digit; judges if the input system time is included in the effective period of certificate, if it is not, comparing its effective period with present time in several pictures.
Description
[technical field]
The invention relates to the method for in cable digital TV, discerning the certificates of recognition validity that ply-yarn drill is arranged.That is, valid period and the system time that the ply-yarn drill certificates of recognition is arranged compared, have in judgement and judge the whether effective method of certificates of recognition that ply-yarn drill is arranged in the cable digital TV of ply-yarn drill certificates of recognition.
[background technology]
General Digital Television refers to the general name of using the digital delivery television program.Be known as in the following TV of advanced television ATV (Advanced television) decision in the U.S. and adopt digital form, HD DIVINE, the SPECTRE of Britain, the France that use in the broadcasting of European Sweden broadcast many digital television engineerings such as DIAMOND of using and all adopt B-ISDN computer network or interactive following TV mode, and various countries are actively studied.
Recently, the digitlization of television broadcasting is fast-developing.
The information flow that transmits in digital broadcasting can be with image/sound/signal data information.Here said, the data message that transmits with image/voice signal refers to, improve (the Advanced Television Enhancement Forum of forum with advanced television, be called for short ATVEF) the XDML of HTML, digital television application software environment (Digital TV Application Software Environment is called for short DASE) for the data message on basis with based on the data of the Xlet of DASE.
Therefore, as described abovely in digital broadcasting, can transmit the numeral of the various ways beyond image that the past transmits or the sound in simulated television.
As mentioned above, increasing user is utilizing the Digital Television of receiving digital broadcast and data broadcasting gradually, accepts various data broadcasting service.
Particularly, need necessary safety and digital content to need under the situation of necessary protection the certificates of recognition that the user uses to be confirmed in bi-directional data broadcasting.
With reference to the accompanying drawings, in cable digital TV,, the certificates of recognition method between ply-yarn drill (Cablecard) and the main frame (Host) is elaborated to being arranged.
Fig. 1 represents in general cable digital TV, the certificates of recognition method schematic diagram between ply-yarn drill and the main frame is arranged.Certificates of recognition in cable digital TV, has ply-yarn drill if play as shown in Figure 1, and above-mentioned have ply-yarn drill and Digital Television (being designated hereinafter simply as main frame) will move binding processor (binding process).At this moment, above-mentioned have ply-yarn drill and main frame to move the certificates of recognition information exchange.Promptly, above-mentioned have ply-yarn drill to use main frame to transmit, the certificates of recognition information of the certificates of recognition device (device certificate) of itself, producer's certificates of recognition (manufacturercertificate), signature (signature), the public key of DH (DH-public key) etc.
So, above-mentioned main frame uses certificates of recognition device that ply-yarn drill transmission itself is arranged, producer's information such as certificates of recognition, signature, the public key of DH.
What certificates of recognition received above-mentioned certificates of recognition information has ply-yarn drill and host verification from the electronic signature that the other side obtains, and judges whether the other side's certificates of recognition is correct certificates of recognition.
Above-mentioned judged result, above-mentioned have certificates of recognition that ply-yarn drill or main frame obtain if wrong certificates of recognition, and certificates of recognition information wrong in the picture will send the user to.
[summary of the invention]
Therefore, the purpose of this invention is to provide a kind of certificates of recognition effective method whether that ply-yarn drill is arranged of in cable digital TV, judging.That is, valid period and current time in certificates of recognition compare, and can know certificates of recognition whether in the operable cable digital TV, judge the certificates of recognition effective method whether that ply-yarn drill is arranged.
To achieve these goals, in cable digital TV, judge the certificates of recognition effective method whether that ply-yarn drill is arranged according to of the present invention, mainly be in order to provide a kind of, from there being ply-yarn drill to begin to receive certificates of recognition, after during efficiency confirmed, if system time table (STT) is present in from the system information (SI) that cable top device begins to transmit, use the system time of the above-mentioned cable numeral of said system timetable (STT) input so.Judge whether the system time after the above-mentioned input was included in the valid period of above-mentioned certificates of recognition, above-mentioned judged result if the said system time not in the valid period of above-mentioned certificates of recognition; At this moment, in a plurality of pictures that show, valid period in the certificates of recognition and current time are compared, just can know whether operable method of certificates of recognition.
If there is not system time table (STT) in the said system information (SI), the current time information of cable digital TV using system time input self, if the system time of above-mentioned input was not included in the valid period of above-mentioned certificates of recognition, will show a plurality of pictures.
If the said system time was included in effective time, use effective certificates of recognition to judge above-mentioned certificates of recognition.
Above-mentioned valid period and system time use date and hour expression.
As mentioned above, in cable digital TV, judge the certificates of recognition effective method whether that ply-yarn drill is arranged according to of the present invention.A kind of method is provided, according to the reception of the system time table (STT) of the system information (SI) that begins to transmit from cable top device whether, time is distinguished, compare with the valid period in the certificates of recognition, whether in can realizing the cable digital TV of safety system more, judging has the certificates of recognition of ply-yarn drill effective.
In addition, in cable digital TV, judge the certificates of recognition effective method whether that ply-yarn drill is arranged according to of the present invention.Provide compare a kind of valid period and current time in certificates of recognition, in can knowing the cable digital TV that can certificates of recognition use, judge the certificates of recognition effective method whether that ply-yarn drill is arranged.
[description of drawings]
Fig. 1 is illustrated in the certificates of recognition method schematic diagram that has in the general cable digital TV between ply-yarn drill and the main frame.
Fig. 2 represents according to embodiments of the invention, the formation generalized schematic of cable digital TV.
Fig. 3 represents that according to embodiments of the invention judging has ply-yarn drill to prove the schematic flow sheet of whether effective method of book.
[embodiment]
In cable digital TV, judge the certificates of recognition that ply-yarn drill is arranged whether effective method embodiment is elaborated of the present invention below with reference to accompanying drawings.
As shown in Figure 2, mainly comprise with lower device and principal character.Cable digital TV is inserted with ply-yarn drill 300 as the TV that receives the broadcasting of using ground ripple analog/digital signal and the transmission of cable analog/digital signal in Digital Television itself (being designated hereinafter simply as main frame) 310.
Above-mentioned cable digital TV is necessary to use ply-yarn drill 300 is arranged in order to receive reliable broadcast message, operation exchange certificates of recognition program mutually in the above-mentioned initial binding processor that ply-yarn drill 300 and main frame 310 arranged.
That is, above-mentioned have ply-yarn drill 300 to transmit certificates of recognition information such as certificates of recognition device in the above-mentioned main frame 310, producer's certificates of recognition, signature, the public key of DH.
So, above-mentioned main frame 310 judged whether and can use from the above-mentioned valid period that has ply-yarn drill 300 to begin to check the guaranty conveyer.
Judgement is from the above-mentioned method that the valid period of the certificates of recognition device that ply-yarn drill 300 begins to transmit is arranged, whether receive according to the system time table (STT) of this method of use from the system information (SI) of cable top device (Cable Headend) transmission, use this time and valid period to compare, judge whether certificates of recognition is effective.
For judging the whether effective method of above-mentioned certificates of recognition, further describe in detail below with reference to Fig. 4.
Fig. 3 represents, according to embodiments of the invention, judges the schematic flow sheet that the whether effective method of ply-yarn drill certificates of recognition is arranged.
As shown in Figure 3, this flow chart mainly may further comprise the steps feature.If be inserted with ply-yarn drill in cable digital TV, main frame is the S400 step from the above-mentioned process that has ply-yarn drill to begin to receive certificates of recognition information; The process of confirming the effective time of above-mentioned certificates of recognition information is the S402 step.Use date and hour expression (for example: on January 1st, 2003 began to see January 1) above-mentioned effective time to 2033.
After moving 402 steps, above-mentioned main frame judges that whether having the process of system time table (STT) in the system information (SI) that begins to transmit from cable top device is the S404 step.
That is, if if there is ply-yarn drill to insert in the main frame, above-mentioned have use the outer OOB of band (OutOf Band) to connect between ply-yarn drill and the main frame, by OOB main frame outside the above-mentioned band with have and just connected transmission channel between the ply-yarn drill.So, above-mentioned wired Cali is sent in the above-mentioned main frame with the channel of above-mentioned connection, the system information (SI) that begins to transmit from cable top device.Simultaneously, above-mentioned main frame judges whether there is system time table (STT) in the system information (SI).
If the judged result system time table (STT) of S404 step exists in the said system information (SI), above-mentioned main frame uses system time table (STT) the input system time of above-mentioned reception.
Next, above-mentioned main frame judges that the process whether the said system time be included in valid period of the certificates of recognition after the above-mentioned affirmation is the S408 step.
If the judged result certificates of recognition valid period of S408 step comprises the said system time, above-mentioned main frame judged result is that above-mentioned certificates of recognition is effectively, can use the process of this time to be the S410 step.
For example: be defined as beginning on January 1st, 2003 to end of day January 1 in 2033 from the valid period that the certificates of recognition information that ply-yarn drill begins to transmit is arranged, just can use under for the year two thousand twenty situation in 15: 00: 00 on the 1st January at the system time table (STT) of system information (SI).
The system time of main frame itself uses said system timetable (STT) (15: 00: 00 on the 1st January of the year two thousand twenty) to import, and judges that the said system time was present in the valid period of above-mentioned certificates of recognition.Effectively can normally use so above-mentioned main frame judge above-mentioned certificates of recognition owing to be included in beginning on January 1st, 2003 to the time on January 1st, 2,033 15: 00: 00 on the 1st January of the year two thousand twenty said system time.
If, the judged result of S408 step if the said system time be not included in certificates of recognition in the valid period, above-mentioned main frame judged result be above-mentioned certificates of recognition during not within scope, this moment show that the process of a plurality of pictures is the S408 step.Above-mentioned a plurality of picture will show in the mode identical with ' the certificates of recognition time is invalid ' etc.The user can see that a plurality of pictures of above-mentioned demonstration know that the valid period of certificates of recognition is not within scope.
If the judged result of S404 step be system time table (STT) not in said system information (SI), the process on current hour/date of above-mentioned main frame using system time input TV itself is the S414 step, and brings into operation from the S408 step.
For example: the valid period of certificates of recognition is defined as and began on January 1st, 2003 to end of day January 1 in 2033, do not have system time table (STT) in the system information (SI), the system time that can see TV inside has day 15: 00: 00 situation January for the year two thousand twenty.
Owing to comprise the said system time in the valid period of above-mentioned certificates of recognition, so the main frame judged result is that certificates of recognition is effective.
If current system time is on January 1st, 2034, owing to do not comprise the said system time in the valid period of above-mentioned certificates of recognition, so above-mentioned main frame can not use the error message of above-mentioned certificates of recognition will pass to the user.
By above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this invention technological thought.
Therefore, the technical scope of this invention is not limited to the content on the specification, must determine its technical scope according to interest field.
Claims (4)
1, in cable digital TV, judge the certificates of recognition effective method whether that ply-yarn drill is arranged, comprising:
There is ply-yarn drill to begin to receive certificates of recognition from above-mentioned, during efficiency confirmed;
The system information (SI) that begins to transmit from cable top device if in have system time table (STT), the system time using system timetable (STT) of above-mentioned cable digital TV is imported;
Whether the system time of judging above-mentioned input is in the valid period of above-mentioned certificates of recognition;
Above-mentioned judged result shows a plurality of pictures if do not comprise the said system time in the effective time of certificates of recognition.
2, in cable digital TV, judge the certificates of recognition effective method whether that ply-yarn drill is arranged as claim item 1 is described, it is characterized in that,
If there is not system time table (STT) in the said system information (SI), the current time of cable digital TV using system time input itself;
If the system time of above-mentioned input was not included in the valid period of above-mentioned certificates of recognition, show a plurality of pictures.
3, describedly in cable digital TV, judge the certificates of recognition effective method whether that ply-yarn drill is arranged as claim item 1 or 2, it is characterized in that,
If the said system time was included in the valid period, use effective certificates of recognition to judge.
4, in cable digital TV, judge the certificates of recognition effective method whether that ply-yarn drill is arranged as claim item 1 is described, it is characterized in that,
Above-mentioned valid period and system time use date and hour expression.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510031036 CN1953538A (en) | 2005-10-21 | 2005-10-21 | A method to identify the effectiveness of certificate of cable card in cable digital TV |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510031036 CN1953538A (en) | 2005-10-21 | 2005-10-21 | A method to identify the effectiveness of certificate of cable card in cable digital TV |
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| Publication Number | Publication Date |
|---|---|
| CN1953538A true CN1953538A (en) | 2007-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200510031036 Pending CN1953538A (en) | 2005-10-21 | 2005-10-21 | A method to identify the effectiveness of certificate of cable card in cable digital TV |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104602048A (en) * | 2015-02-13 | 2015-05-06 | 深圳国微技术有限公司 | Conditional access module and verification method based on same |
-
2005
- 2005-10-21 CN CN 200510031036 patent/CN1953538A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104602048A (en) * | 2015-02-13 | 2015-05-06 | 深圳国微技术有限公司 | Conditional access module and verification method based on same |
| CN104602048B (en) * | 2015-02-13 | 2018-06-22 | 深圳国微技术有限公司 | A kind of method of calibration and Conditional Access Module based on Conditional Access Module |
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