CN104602048B - A kind of method of calibration and Conditional Access Module based on Conditional Access Module - Google Patents
A kind of method of calibration and Conditional Access Module based on Conditional Access Module Download PDFInfo
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- CN104602048B CN104602048B CN201510080575.3A CN201510080575A CN104602048B CN 104602048 B CN104602048 B CN 104602048B CN 201510080575 A CN201510080575 A CN 201510080575A CN 104602048 B CN104602048 B CN 104602048B
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- cam
- dtv
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- certificate
- host side
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
- H04N21/26606—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for generating or managing entitlement messages, e.g. Entitlement Control Message [ECM] or Entitlement Management Message [EMM]
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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
- H04N21/45—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]
-
- 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
- H04N21/4627—Rights management associated to the content
Abstract
The embodiment of the invention discloses a kind of methods of calibration based on Conditional Access Module CAM, for promoting the efficiency of certificate verification, promote user experience.Present invention method includes：Conditional Access Module CAM obtains electric energy from the power supply module in the DTV host side, to carry out electrifying startup；The CAM obtains the certificate of the DTV host side；The CAM carries out term of validity verification according to system time preset in system time module to the certificate.The embodiment of the present invention also provides a kind of Conditional Access Module CAM, for promoting the efficiency of certificate verification, promotes user experience.
Description
Technical field
The present invention relates to digital TV technology more particularly to a kind of methods of calibration and item based on Conditional Access Module
Part receiving module.
Background technology
Conditional Access Module (CAM, Condition Access Module), which is inserted into all-in-one machine CI slots, to be used
, major function is to complete descrambling work, and DTV host side is needed to get transmitting stream (Transport from front end
Stream, TS), then the CAM passes through calculator memory card international federation (Personal ComputerMemory Card again
International Association, PCMCIA) interface that defines obtains encrypted audio and video from the DTV host side
Stream information is shown transparent program back-transmission to the DTV host side after completing descrambling.
In practical applications, in order to improve the safety descrambled to program, CAM and DTV host side need to obtain system
Unite the time, and according to digital video broadcasting common interface (Digital Video Broadcast-Common Interface,
DVB-CI) standard agreement completion verifies the term of validity of CI Plus (new general-purpose interface specification) certificate, only verifies into
Work(, CAM could descramble ciphered program.
The inventors of the present application found that when being verified to CI Plus certificates, verification efficiency is low, influences user experience.
Invention content
An embodiment of the present invention provides a kind of method of calibration based on Conditional Access Module CAM, for promoting certificate verification
Efficiency, promoted user experience.
First aspect of the embodiment of the present invention provides a kind of method of calibration based on Conditional Access Module CAM, which is characterized in that
Including：
Conditional Access Module CAM obtains electric energy from the power supply module in the DTV host side, power on opening
It is dynamic；
The CAM obtains the certificate of the DTV host side；
The CAM carries out term of validity verification according to system time preset in system time module to the certificate.
With reference to the embodiment of the present invention in a first aspect, in the first realization method of first aspect of the embodiment of the present invention,
The certificate that the CAM obtains the DTV host side includes：
The CAM sends safety certification request to the DTV host side, to obtain the DTV host side
Mark；
The CAM obtains the certificate by the mark at the DTV end, and the mark is carried in the certificate.
With reference to the embodiment of the present invention in a first aspect, in second of realization method of first aspect of the embodiment of the present invention,
The CAM carries out the certificate term of validity verification according to preset system time and includes：
The CAM obtains the corresponding time range of the term of validity of the certificate；
Whether the CAM determines the preset system time in the time range.
With reference to the second of the first aspect of the embodiment of the present invention or the first realization method of first aspect or first aspect
Kind of realization method, in the third realization method of first aspect of the embodiment of the present invention, in the CAM from the DTV master
Power supply module in generator terminal obtains electric energy, further included after electrifying startup：
When the power supply module power-off of the DTV host side, electric energy is obtained from the power supply module in the CAM.
With reference to the second of the first aspect of the embodiment of the present invention or the first realization method of first aspect or first aspect
Kind of realization method, in the 4th kind of realization method of first aspect of the embodiment of the present invention, in the CAM from the DTV master
Power supply module in generator terminal obtains electric energy, further included after electrifying startup：
The CAM sets sector in a flash memory；
The CAM backs up the data in the flash memory, to form Backup Data；
The CAM preserves the Backup Data within the sector.
Second aspect of the embodiment of the present invention provides a kind of Conditional Access Module CAM, including：
First acquisition module, for obtaining electric energy from the power supply module in the DTV host side, to be powered on
Start；
Second acquisition module, for obtaining the certificate of the DTV host side；
System time module, for providing system time；
For the system time provided according to the system time module, the term of validity is carried out to the certificate for correction verification module
Verification.
With reference to the second aspect of the embodiment of the present invention, in the first realization method of second aspect of the embodiment of the present invention,
Second acquisition module includes：
Transmitting element, for sending safety certification request to the DTV end, to obtain the DTV host
The mark at end；
First acquisition unit for obtaining the certificate by the mark at the DTV end, carries in the certificate
There is the mark.
With reference to the second aspect of the embodiment of the present invention, in second of realization method of second aspect of the embodiment of the present invention,
The correction verification module includes：
Second acquisition unit, for obtaining the corresponding time range of the term of validity of the certificate；
Determination unit, for determining the system time of the system time module offer whether in the time range.
With reference to the second of the second aspect of the embodiment of the present invention or the first realization method of second aspect or second aspect
Kind realization method, in the third realization method of second aspect of the embodiment of the present invention, further includes：
Power supply module, for when the power supply module of the DTV host side powers off, electric energy to be provided for the CAM.
With reference to the second of the second aspect of the embodiment of the present invention or the first realization method of second aspect or second aspect
Kind realization method, in the third realization method of second aspect of the embodiment of the present invention, further includes：
Setup module, for the CAM from the DTV host side power supply module obtain electric energy after,
Sector is set in flash memory；
Backup module, for the data in the flash memory to be backed up, to form Backup Data；
Preserving module, for the Backup Data to be preserved within the sector.
It is had the advantages that using the technical solution of the embodiment of the present invention：
After CAM obtains the certificate of DTV host side, the system by being provided in time module preset in the CAM
Time carries out the certificate verification of the term of validity, relative to the prior art, without to being carried out from the temporal information in the code stream of front end
Filtering is so as to obtain system time or obtain system time from DTV host side, so as to save acquisition system time
Time, play improve verification certificate efficiency purpose.
Description of the drawings
Fig. 1 is a kind of one embodiment signal of method of calibration based on Conditional Access Module CAM in the embodiment of the present invention
Figure；
Fig. 2 is a kind of another embodiment signal of method of calibration based on Conditional Access Module CAM in the embodiment of the present invention
Figure；
Fig. 3 is a kind of another embodiment signal of method of calibration based on Conditional Access Module CAM in the embodiment of the present invention
Figure；
Fig. 4 is a kind of one embodiment schematic diagram of Conditional Access Module CAM in the embodiment of the present invention；
Fig. 5 is a kind of one embodiment schematic diagram of Conditional Access Module CAM in the embodiment of the present invention；
Fig. 6 is a kind of one embodiment schematic diagram of Conditional Access Module CAM in the embodiment of the present invention；
Fig. 7 is a kind of one embodiment schematic diagram of Conditional Access Module CAM in the embodiment of the present invention.
Specific embodiment
An embodiment of the present invention provides a kind of method of calibration based on Conditional Access Module CAM, for promoting certificate verification
Efficiency, promoted user experience.
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, the every other implementation that those skilled in the art are obtained without creative efforts
Example, shall fall within the protection scope of the present invention.
Referring to Fig. 1, a kind of one embodiment of the method for calibration based on Conditional Access Module CAM in the embodiment of the present invention
Including：
101st, the CAM obtains electric energy from the power supply module in the DTV host side, carries out electrifying startup.
102nd, Conditional Access Module CAM obtains the certificate of the DTV host side.
It is understood that when CAM from DTV host side power supply module obtain electric energy, carry out electrifying startup it
Afterwards, which obtains the CI Plus certificates of DTV host side, so as to start the checking process of CI Plus certificates.
103rd, the CAM carries out term of validity verification according to system time preset in system time module to the certificate.
It is understood that system time module is preset in the CAM, when CAM dispatches from the factory, in the system time module
Accurate system time is preset, in the CAM after the CI Plus certificates of DTV host side are got, which can be with
The system time is got from the system time module, and carries out the verification of the term of validity to the certificate according to the system time.
The embodiment of the present invention after CAM obtains the certificate of DTV host side, passes through time mould preset in the CAM
The system time provided in block carries out the certificate verification of the term of validity, relative to the prior art, without to from the code stream of front end
Temporal information be filtered so as to obtain system time or from DTV host side obtain system time, so as to save
The time of system time is obtained, plays the purpose for improving verification certificate efficiency.
Referring to Fig. 2, in the embodiment of the present invention a kind of method of calibration based on Conditional Access Module CAM another implementation
Example includes：
201st, the CAM obtains electric energy from the power supply module in the DTV host side, carries out electrifying startup.
Optionally, step 202 is further included after step 201 in the present embodiment.
202nd, the CAM backs up the data in flash memory.
After CAM carries out electrifying startup, which sets sector in a flash memory, and the data in the flash memory are carried out
Backup to form Backup Data, then preserves the Backup Data within the sector, so as to prevent reading and writing data process
In, the loss of data caused by DTV host side accident power-off.
203rd, the CAM sends safety certification request to the DTV host side, to obtain the DTV master
The mark of generator terminal.
It is understood that CAM obtains electric energy from the power supply module in DTV host side, carry out electrifying startup it
Afterwards, which can send safety certification request to the DTV host side, which is receiving the safety
After certification request, response message is sent to the CAM, the mark of the DTV host side is carried in the response message.
204th, the CAM obtains the certificate by the mark at the DTV end, is carried in the certificate described
Mark.
The mark of the DTV host side is included in the certificate of DTV host side, which is getting digital electricity
After the mark of host side, corresponding certificate, such as DTV host side can be matched using the identifier lookup
Number be 001, the certificate of the DTV host side also carries number 001, after CAM gets number 001, i.e.,
The certificate for matching and carrying that number is 001 is searched from the DTV host side using the number.
205th, the CAM obtains the corresponding time range of the term of validity of the certificate.
For CAM when carrying out certificate registration, term of validity will be awarded in the certificate of the registration, when certificate is more than the term of validity,
It is re-registered, so as to achieve the purpose that regularly update to certificate, certificate is made preferably to play safety certification
Effect.
206th, whether the CAM judges the preset system time in the time range.
It is understood that when CAM to certificate carry out the term of validity verification when, the CAM can get certificate it is effective when
Between and system time mould system time in the block, and the system time is compared with the effective time of the certificate, so as to sentence
The system time break whether in the range of the effective time, if it is not, step 207 is then performed, if so, performing step 208.
207th, terminate flow.
If judging, the system time not in the range of effective time, terminates flow.
208th, CAM with Host by carrying out key exchange.
CAM with Host by carrying out key exchange, it was demonstrated that other side itself can generate the various keys for verification process.
In the embodiment of the present invention, after CAM obtains the certificate of DTV host side, pass through the time preset in the CAM
The system time provided in module carries out the certificate verification of the term of validity, relative to the prior art, without to from front end code stream
In temporal information be filtered so as to obtain system time or from DTV host side obtain system time, so as to save
The time of system time is about obtained, plays the purpose for improving verification certificate efficiency；It is possible to further pass through DTV master
Identifier lookup in generator terminal, so as to accurately get certificate, promotes the success rate of certification authentication to certificate.
Referring to Fig. 3, in the embodiment of the present invention a kind of method of calibration based on Conditional Access Module CAM another implementation
Example includes：
301st, the CAM obtains electric energy from the power supply module in the DTV host side, carries out electrifying startup.
Optionally, step 302 is further included after step 301 in the present embodiment.
302nd, when the power supply module power-off in DTV host side, electric energy is obtained from the power supply module in the CAM.
After CAM electrifying startups, which can carry out the read-write operation of data from flash memory, however as DTV master
When the power supply module of generator terminal powers off, which can be switched to gapless and give Flash Memory by the power supply module of itself
(flash memory) is powered, avoid because CAM power down Flash Memory are damaged, and do not need to CAM additionally divide it is standby
Part sector is read data and is protected, and saves Flash memory spaces, improves CAMFlash Memory utilization rates.
It should be noted that
303rd, the CAM sends safety certification request to the DTV host side, to obtain the DTV master
The mark of generator terminal.
It is understood that CAM obtains electric energy from the power supply module in DTV host side, carry out electrifying startup it
Afterwards, which can send safety certification request to the DTV host side, which is receiving the safety
After certification request, response message is sent to the CAM, the mark of the DTV host side is carried in the response message.
304th, the CAM obtains the certificate by the mark at the DTV end, is carried in the certificate described
Mark.
The mark of the DTV host side is included in the certificate of DTV host side, which is getting digital electricity
After the mark of host side, corresponding certificate, such as DTV host side can be matched using the identifier lookup
Number be 001, the certificate of the DTV host side also carries number 001, after CAM gets number 001, i.e.,
The certificate for matching and carrying that number is 001 is searched from the DTV host side using the number.
305th, the CAM obtains the corresponding time range of the term of validity of the certificate.
For CAM when carrying out certificate registration, term of validity will be awarded in the certificate of the registration, when certificate is more than the term of validity,
It is re-registered, so as to achieve the purpose that regularly update to certificate, certificate is made preferably to play safety certification
Effect.
306th, whether the CAM determines the preset system time in the time range.
It is understood that when CAM to certificate carry out the term of validity verification when, the CAM can get certificate it is effective when
Between and system time mould system time in the block, and the system time is compared with the effective time of the certificate, so as to sentence
The system time break whether in the range of the effective time, if it is not, step 307 is then performed, if so, performing step 308.
307th, terminate flow.
If judging, the system time not in the range of effective time, terminates flow.
308th, CAM with Host by carrying out key exchange.
CAM with Host by carrying out key exchange, it was demonstrated that other side itself can generate the various keys for verification process.
In the embodiment of the present invention, after CAM obtains the certificate of DTV host side, pass through the time preset in the CAM
The system time provided in module carries out the certificate verification of the term of validity, relative to the prior art, on the one hand without in the past
Temporal information in the code stream of end is filtered so as to obtain system time or obtain system time from DTV host side,
So as to save the time for obtaining system time, the purpose for improving verification certificate efficiency is played；On the other hand, as DTV master
When power supply module in generator terminal powers off, electric energy can be obtained from the power supply module of the CAM itself, avoided because of CAM power down pair
Flash Memory are damaged, and do not need to CAM additionally divide alternate sector read data protected, save Flash
Memory space improves the Flash Memory utilization rates of CAM.
In above example, a kind of method of calibration based on Conditional Access Module CAM in the embodiment of the present invention is carried out
Description, is below described Conditional Access Module CAM a kind of in the embodiment of the present invention.
Referring to Fig. 4, a kind of one embodiment based on Conditional Access Module CAM includes in the embodiment of the present invention：
First acquisition module 401, for obtaining electric energy from the power supply module in the DTV host side, on carrying out
It electrically activates；
Second acquisition module 402, for obtaining the certificate of the DTV host side；
System time module 403, for providing system time；
Correction verification module 404, for carrying out the term of validity to the certificate according to the system time provided in system time module
Verification.
In some embodiments of the present invention, the second acquisition module may include transmitting element and first acquisition unit, calibration mode
Block may include second acquisition unit and determination unit.
Referring to Fig. 5, a kind of another embodiment based on Conditional Access Module CAM includes in the embodiment of the present invention：
First acquisition module 501, for obtaining electric energy from the power supply module in the DTV host side, on carrying out
It electrically activates.
Second acquisition module 502, for obtaining the certificate of the DTV host side.
Optionally, second acquisition module 502 includes transmitting element 5021 and first acquisition unit 5022, wherein described
Transmitting element 5021, for sending safety certification request to the DTV end, to obtain the DTV host side
Mark；The first acquisition unit 5022, for obtaining the certificate by the mark at the DTV end, in the certificate
Carry the mark.
System time module 503, for providing system time.
Correction verification module 504, for carrying out the term of validity to the certificate according to system time preset in system time module
Verification.
Optionally, the verification unit 504 includes second acquisition unit 5041 and determination unit 5042, wherein described second
Acquiring unit 5041, for obtaining the corresponding time range of the term of validity of the certificate；The determination unit 5042, for determining
Whether the preset system time is in the time range.
In some embodiments of the present invention, the CAM further includes power supply module.
Referring to Fig. 6, a kind of another embodiment based on Conditional Access Module CAM includes in the embodiment of the present invention：
First acquisition module 601, for obtaining electric energy from the power supply module in the DTV host side, on carrying out
It electrically activates.
Power supply module 602, for when the power supply module of the DTV host side powers off, electricity to be provided for the CAM
Energy.
Second acquisition module 603, for obtaining the certificate of the DTV host side.
Optionally, second acquisition module 603 includes transmitting element 6031 and first acquisition unit 6032, wherein described
Transmitting element 6031, for sending safety certification request to the DTV end, to obtain the DTV host side
Mark；The first acquisition unit 6032, for obtaining the certificate by the mark at the DTV end, in the certificate
Carry the mark.
System time module 604, for providing system time.
Correction verification module 605, for carrying out the term of validity to the certificate according to system time preset in system time module
Verification.
Optionally, the correction verification module 605 includes second acquisition unit 6051 and determination unit 6052, wherein described second
Acquiring unit 6051, for obtaining the corresponding time range of the term of validity of the certificate；The determination unit 6052, for determining
Whether the preset system time is in the time range.
In some embodiments of the present invention, the CAM further includes setup module, backup module and preserving module.
Referring to Fig. 7, a kind of another embodiment based on Conditional Access Module CAM includes in the embodiment of the present invention：
First acquisition module 701, for obtaining electric energy from the power supply module in the DTV host side, on carrying out
It electrically activates.
Setup module 702, for the CAM from the DTV host side power supply module obtain electric energy it
Afterwards, sector is set in a flash memory；
Backup module 703, for the data in the flash memory to be backed up, to form Backup Data；
Preserving module 704, for the Backup Data to be preserved within the sector.
Second acquisition module 705, for obtaining the certificate of the DTV host side.
Optionally, second acquisition module 705 includes transmitting element 7051 and first acquisition unit 7052, wherein described
Transmitting element 7051, for sending safety certification request to the DTV end, to obtain the DTV host side
Mark；The first acquisition unit 7052, for obtaining the certificate by the mark at the DTV end, in the certificate
Carry the mark.
System time module 706, for providing system time.
Correction verification module 707, for carrying out the term of validity to the certificate according to system time preset in system time module
Verification.
Optionally, the correction verification module 707 includes second acquisition unit 7071 and determination unit 7072, wherein described second
Acquiring unit 7071, for obtaining the corresponding time range of the term of validity of the certificate；The determination unit 7072, for determining
Whether the preset system time is in the time range.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit can refer to the corresponding process in preceding method embodiment, and details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of division of logic function can have other dividing mode, such as multiple units or component in actual implementation
It may be combined or can be integrated into another system or some features can be ignored or does not perform.Another point, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be the indirect coupling by some interfaces, device or unit
It closes or communicates to connect, can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separate, be shown as unit
The component shown may or may not be physical unit, you can be located at a place or can also be distributed to multiple
In network element.Some or all of unit therein can be selected according to the actual needs to realize the mesh of this embodiment scheme
's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also
That each unit is individually physically present, can also two or more units integrate in a unit.Above-mentioned integrated list
The form that hardware had both may be used in member is realized, can also be realized in the form of SFU software functional unit.
If the integrated unit is realized in the form of SFU software functional unit and is independent product sale or uses
When, it can be stored in a computer read/write memory medium.Based on such understanding, technical scheme of the present invention is substantially
The part to contribute in other words to the prior art or all or part of the technical solution can be in the form of software products
It embodies, which is stored in a storage medium, is used including some instructions so that a computer
Equipment (can be personal computer, server or the network equipment etc.) performs the complete of each embodiment the method for the present invention
Portion or part steps.And aforementioned storage medium includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to before
Embodiment is stated the present invention is described in detail, it will be understood by those of ordinary skill in the art that：It still can be to preceding
The technical solution recorded in each embodiment is stated to modify or carry out equivalent replacement to which part technical characteristic；And these
Modification is replaced, the spirit and scope for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of method of calibration based on Conditional Access Module, which is characterized in that including：
Conditional Access Module CAM obtains electric energy from the power supply module in DTV host side, to carry out electrifying startup；
The CAM obtains the certificate of the DTV host side；
The CAM carries out term of validity verification according to system time preset in preset system time module to the certificate.
2. according to the method described in claim 1, it is characterized in that, the CAM obtains the certificate of the DTV host side
Including：
The CAM sends safety certification request to the DTV host side, to obtain the mark of the DTV host side
Know；
The CAM obtains the certificate by the mark at the DTV end, and the mark is carried in the certificate.
3. according to the method described in claim 1, it is characterized in that, the CAM according to preset system time to the certificate
Term of validity verification is carried out to include：
The CAM obtains the corresponding time range of the term of validity of the certificate；
Whether the CAM determines the preset system time in the time range.
4. according to the method in any one of claims 1 to 3, which is characterized in that in the CAM from the DTV master
Power supply module in generator terminal obtains electric energy, further included after electrifying startup：
When the power supply module power-off of the DTV host side, electric energy is obtained from the power supply module in the CAM.
5. according to the method in any one of claims 1 to 3, which is characterized in that in the CAM from the DTV master
Power supply module in generator terminal obtains electric energy, further included after electrifying startup：
The CAM sets sector in a flash memory；
The CAM backs up the data in the flash memory, to form Backup Data；
The CAM preserves the Backup Data within the sector.
6. a kind of Conditional Access Module CAM, which is characterized in that including：
First acquisition module, for obtaining electric energy from the power supply module in DTV host side, to carry out electrifying startup；
Second acquisition module, for obtaining the certificate of the DTV host side；
System time module, for providing system time；
For the system time provided according to the system time module, term of validity verification is carried out to the certificate for correction verification module.
7. CAM according to claim 6, which is characterized in that second acquisition module includes：
Transmitting element, for sending safety certification request to the DTV end, to obtain the DTV host side
Mark；
First acquisition unit for obtaining the certificate by the mark at the DTV end, carries in the certificate
State mark.
8. CAM according to claim 6, which is characterized in that the correction verification module includes：
Second acquisition unit, for obtaining the corresponding time range of the term of validity of the certificate；
Determination unit, for determining the system time of the system time module offer whether in the time range.
9. the CAM according to any one of claim 6 to 8, which is characterized in that further include：
Power supply module, for when the power supply module of the DTV host side powers off, electric energy to be provided for the CAM.
10. the CAM according to any one of claim 6 to 8, which is characterized in that further include：
Setup module, for the CAM from the DTV host side power supply module obtain electric energy after, in flash memory
Middle setting sector；
Backup module, for the data in the flash memory to be backed up, to form Backup Data；
Preserving module, for the Backup Data to be preserved within the sector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510080575.3A CN104602048B (en) | 2015-02-13 | 2015-02-13 | A kind of method of calibration and Conditional Access Module based on Conditional Access Module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510080575.3A CN104602048B (en) | 2015-02-13 | 2015-02-13 | A kind of method of calibration and Conditional Access Module based on Conditional Access Module |
Publications (2)
| Publication Number | Publication Date |
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| CN104602048A CN104602048A (en) | 2015-05-06 |
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| CN105611353A (en) * | 2015-12-23 | 2016-05-25 | 福建新大陆通信科技股份有限公司 | Conditional access method by using fingerprint for set top box |
| CN114666665B (en) * | 2020-12-23 | 2023-08-01 | 深圳Tcl新技术有限公司 | Certificate authentication method, storage medium and television |
| CN114189724A (en) * | 2021-12-06 | 2022-03-15 | 国微集团(深圳)有限公司 | Technology upgrading module of condition receiving card |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1953538A (en) * | 2005-10-21 | 2007-04-25 | 上海乐金广电电子有限公司 | A method to identify the effectiveness of certificate of cable card in cable digital TV |
| CN101043612A (en) * | 2006-03-21 | 2007-09-26 | 三星电子株式会社 | Method and device for checking validity period of certificate and method and device for displaying content information |
| EP2259544A1 (en) * | 2009-06-02 | 2010-12-08 | Irdeto Access B.V. | Controlling the validity period of a decryption key |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1953538A (en) * | 2005-10-21 | 2007-04-25 | 上海乐金广电电子有限公司 | A method to identify the effectiveness of certificate of cable card in cable digital TV |
| CN101043612A (en) * | 2006-03-21 | 2007-09-26 | 三星电子株式会社 | Method and device for checking validity period of certificate and method and device for displaying content information |
| EP2259544A1 (en) * | 2009-06-02 | 2010-12-08 | Irdeto Access B.V. | Controlling the validity period of a decryption key |
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