CN100583990C - Setup method and setup system for TV program stream secrete key of mobile terminal - Google Patents
Setup method and setup system for TV program stream secrete key of mobile terminal Download PDFInfo
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- CN100583990C CN100583990C CN200710064179A CN200710064179A CN100583990C CN 100583990 C CN100583990 C CN 100583990C CN 200710064179 A CN200710064179 A CN 200710064179A CN 200710064179 A CN200710064179 A CN 200710064179A CN 100583990 C CN100583990 C CN 100583990C
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Abstract
The invention discloses a method for arranging the secret key of the TV program stream of a mobile terminal. The method of the invention comprises the steps that time intervals are divided on the TV service platform of the mobile terminal and a time mark is arranged for each time interval; a program stream secret key mark is generated by using a time mark corresponding to a moment when the program stream secret key takes effect and is broadcasted together with the program stream and the program stream secret key; a validity period of a service secret key is generated according to time intervals where the beginning moment and the finishing moment of a required TV program are respectively recorded when an authorization request is received from the mobile terminal. The invention also discloses a system for arranging the secret key of the TV program of the mobile terminal and the system comprises scramblers communicated with each other and a TV service platform of the mobile terminal, wherein, the TV service platform of the mobile terminal comprises a time mark arranging module, and a program stream secret key mark arranging module and a service secret key validity period generating module which are respectively connected with the time mark arranging module. By adopting the method and the system provided by the invention, a receiving terminal is guaranteed to be capable of correctly deciphering the program stream secret key by using the service secret key, thus avoiding the additional expenditure of system resources.
Description
Technical field
The present invention relates to a kind of method to set up of TV program stream secrete key of mobile terminal and system is set, particularly a kind of TV programs to mobile terminal key and time are carried out related method to set up and system is set, belong to the mobile communication technology field.
Background technology
Based on the mobile terminal television (mobile TV) of broadcast mode, be meant the receiver module that on portable terminal, loads mobile digital TV, make portable terminal can receive the Voice ﹠ Video content of broadcast digital TV program.Mobile TV has two kinds of form of services: a kind of is the One-to-All Broadcast form of carrying out multimedia broadcasting and information issue by the unidirectional down channel of radio network to handheld terminal; A kind of is the two-way interaction form of service that combines with the up channel of mobile communications network.For first kind of form of service, because the user can't select programme content, can only passively receive, operator or program supplier also can't obtain economic well-being of workers and staff simultaneously, therefore only can exist with the form of service of public welfare or advertisement character; For second kind of form of service, the user can carry out the interaction of programme content by the up channel of mobile communications network, freely select to be ready the programme content watched, operator or program supplier can rely on the charge system of mobile communications network maturation to obtain corresponding remuneration simultaneously, therefore, become the emphasis and the direction of mobile terminal television development.
At present, mobile communications network combine with radio network broadcast TV programs to mobile terminal system as shown in Figure 1, watch in order to guarantee that TV programs to mobile terminal is not gone beyond one's commission, adopted following technical scheme: scrambler generates and uses the program current cipher key that constantly changes to encrypt TV programs to mobile terminal, and the program after the encryption broadcasts by radio network; The mobile terminal television service platform generates business cipher key, and this business cipher key is used to the ciphered program stream secrete key, and this encryption can be undertaken by scrambler, also can be undertaken by the mobile terminal television service platform; This encrypted program stream keys is sent by radio network by scrambler, and this business cipher key sends to the portable terminal of obtaining the authorization by the mobile terminal television service platform by mobile communications network.Like this, the portable terminal of obtaining the authorization, deciphering obtains program current cipher key according to business cipher key, and then realizes the deciphering of TV programme is watched.
By technique scheme, can realize the mandate of TV programs to mobile terminal is watched.This mandate has three kinds of modes: the one, insertion authority, promptly permit the access request of portable terminal after, this portable terminal just can freely be asked and TV reception; The one, set time section mandate, such as authorizing by month, then portable terminal needs every month request authentication once, can freely ask and TV reception in the corresponding time period by the portable terminal of authentication; The one, authorize at program, promptly respectively the program current cipher key of each TV programme is encrypted, then the user utilizes the business cipher key deciphering that receives to obtain to be authorized to program current cipher key, finishes authorizing the deciphering of program.Corresponding to said process, operator collects corresponding cost in the time of can putting or authorize each program in access, set time respectively.
Obviously, authorize more flexibly with rationally at program, but be different from insertion authority and set time section mandate, both authorize demand side to different portable terminals at program, also need to be provided with the different mandate terms of validity, comprise: the mobile TV service platform need be according to the request of portable terminal, the beginning and ending time of obtaining the TV programme of being asked, the term of validity of business cipher key is set according to this beginning and ending time then; Simultaneously, scrambler need use the encrypting program stream keys program of continuous conversion, and in other words, each program current cipher key is used to encrypt the sheet sometime of a program.Watch a certainly during in the TV programme that t1-t2 play in the time period when mobile terminal request, the business cipher key that terminal is obtained from business platform should be able to be deciphered the program current cipher key of t1-t2 in the time period.Because business platform can't know in advance which program current cipher key scrambler will use, decrypt the program current cipher key in the fixed time section surely so can not guarantee business cipher key one that business platform sends to portable terminal, therefore cause the user correctly to decipher program stream, bring bad use experience.And can decipher program current cipher key in order to ensure the mandate term of validity that business cipher key limited, just need mobile TV service platform and scrambler to carry out Signalling exchange, review business cipher key the coming into force constantly of pairing program current cipher key constantly of coming into force forward, and then the coming into force constantly of corresponding adjustment business cipher key, this has increased the burden of system resource undoubtedly, has also caused the feedback delay to user's request simultaneously.
Summary of the invention
The objective of the invention is defective at above-mentioned prior art, a kind of method to set up of TV program stream secrete key of mobile terminal is provided and system is set, by with TV programme key and association in time, guarantee that receiving terminal can use business cipher key correctly to decipher program current cipher key, the extra expenses that do not bring system resource simultaneously.
For achieving the above object, the invention provides a kind of method to set up of TV program stream secrete key of mobile terminal, may further comprise the steps:
The mobile terminal television service platform carries out the division of time interval, for each time interval is provided with time marking;
Described mobile terminal television service platform uses the program current cipher key constantly pairing time marking that comes into force to generate the program current cipher key sign, and described program current cipher key sign and program stream and use business cipher key encrypted program stream keys are together broadcasted; Ciphered program stream in described program current cipher key is used for coming into force constantly to described program current cipher key is deciphered;
When receiving the authorization requests of portable terminal, the mobile terminal television service platform is according to the start-stop of the request TV programme time interval at place respectively constantly, generates the business cipher key term of validity and be encapsulated into to send to described portable terminal in the business cipher key; Described business cipher key is used for the program current cipher key that the program current cipher key sign is in the business cipher key term of validity is carried out decryption oprerations.
In order not take a large amount of system resource, preferable technical scheme is that the division that described mobile terminal television service platform carries out time interval comprises: described mobile terminal television service platform is a starting point with business cipher key updated time each time, resets time marking.
Then this method also comprises: described mobile terminal television service platform is provided with the update cycle of business cipher key, and the merchant of the maximum indicating value of described business cipher key update cycle and time marking is less than or equal to time interval.
For convenience of description, with respect to the real time as time marking, better technical scheme is that described mobile terminal television service platform is provided with time marking by giving each time interval specific I D value.
Generating the business cipher key term of validity can be specially: the initial value and the stop value that generate the term of validity, described initial value by the last time interval of the initial moment of request TV programme or the time marking of place time interval, described stop value by the termination time marking in place time interval or one time interval, back constantly of request TV programme; Select above-mentioned arbitrary initial value and arbitrary stop value, constitute the business cipher key term of validity.
The present invention also provides a kind of system that is provided with of TV program stream secrete key of mobile terminal, comprises the scrambler and the mobile terminal television service platform of intercommunication mutually; Wherein, described mobile terminal television service platform comprises: time marking is provided with module, is used to carry out the division of time interval, and time marking is set for each time interval; The program current cipher key sign is provided with module, with described time marking module being set is connected, being used to receive the program current cipher key that scrambler sends comes into force constantly, and according to the time corresponding sign generation program current cipher key sign constantly that comes into force, and return to scrambler and program stream and use the business cipher key encrypted program stream keys together to broadcast; Ciphered program stream in described program current cipher key is used for coming into force constantly to described program current cipher key is deciphered; Business cipher key term of validity generation module, with described time marking module being set is connected, be used for authorization requests according to the portable terminal that receives, the time interval at place is distinguished in the start-stop of definite TV programme of asking constantly, generates the business cipher key term of validity and be encapsulated into to send to described portable terminal in the business cipher key; Described business cipher key is used for the program current cipher key that the program current cipher key sign is in the business cipher key term of validity is carried out decryption oprerations.
As shown from the above technical solution, the present invention sends coming into force constantly of program current cipher key by scrambler, adopts TV programme key and association in time, has following beneficial effect:
1, guaranteed that receiving terminal can use business cipher key correctly to decipher program current cipher key;
2, avoided extra system resource spending.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is that mobile communications network combines the system schematic of broadcasting TV programs to mobile terminal in the prior art with radio network;
Fig. 2 is the flow chart of the method to set up of TV program stream secrete key of mobile terminal provided by the present invention;
Fig. 3 is in the method provided by the present invention, the schematic diagram of the program current cipher key sign and the business cipher key term of validity;
Fig. 4 is the structured flowchart of the system that is provided with of TV program stream secrete key of mobile terminal provided by the present invention.
Embodiment
In order to guarantee that receiving terminal can use business cipher key correctly to decipher program current cipher key, the extra expenses that simultaneously do not bring system resource, the invention provides a kind of method to set up of TV program stream secrete key of mobile terminal and system is set, by with TV programs to mobile terminal key and time correlation connection, make the term of validity that is requested the related whole program current cipher keys of program can fall into the interval of the business cipher key term of validity.
At first, in order to overcome the time matching problem, with reference to the existing timestamp notion of moving communicating field, being about to the time field joins traffic flow information and gathers, the present invention introduces time marking in the cipher key application, a kind of method to set up of TV program stream secrete key of mobile terminal is provided, and as shown in Figure 2, an embodiment may further comprise the steps:
Step 4, portable terminal use described business cipher key that the program stream by broadcast reception is decrypted and watch; Wherein, business cipher key is carried out decryption oprerations to the program current cipher key that the program current cipher key sign is in the business cipher key term of validity.
From above-mentioned steps as can be seen, clock is arrived in the mobile terminal television service platform by unified, is benchmark with the time shaft, and the business cipher key term of validity and program current cipher key sign is set.Therefore, by the control of rule is set, whole program current cipher keys that can guarantee the TV programme of asking can fall in the term of validity of business cipher key, thereby portable terminal can be correctly decoded the program current cipher key of the encryption that sends by radio network according to the business cipher key that receives, thereby realizes normally watching TV programme.
Simultaneously, the present invention is not confined to the notion of timestamp, but has proposed time marking, compares with timestamp, has realized the shortening of field, helps the interpolation of big quantitative character.
Wherein, the division that the mobile terminal television service platform carries out time interval in the step 1 comprises: described mobile terminal television service platform is a starting point with business cipher key updated time each time, resets time marking.For example, business cipher key every month upgrades once, zero zero second when first day every month zero then, and time marking returns initial value, counts again then or timing.Like this, the data bit that is used for describing time marking is limited within the finite length forever, not too much occupying system resources.Perhaps, also can adopt data bit to overflow the method for control, the statistics again that when data bit is overflowed, makes zero, but lack regularity like this, be unfavorable for time marking is carried out orderly management.Perhaps, also can adopt other methods to set up known to those skilled in the art, such as restore data position etc. is set.
When being the benchmark in time division interval with the business cipher key update cycle, also can comprise before the step 1: the mobile terminal television service platform is provided with the update cycle of business cipher key, and the merchant that described business cipher key update cycle and program current cipher key identify maximum indicating value is less than or equal to time interval.Such as, when the field that is used for describing time marking was 2 bytes, the minimum indicating value of this time marking was 1, maximum indicating value is 65536; Then when the time, the sign circulation returned to minimum indicating value, business cipher key must upgrade, otherwise a time marking will occur corresponding to two business cipher keys, causes the confusion of the system matches business cipher key term of validity and business cipher key.Therefore, when business cipher key every month being set upgrading once, the division of each time interval should be greater than 42 seconds.In this manual, with per 45 seconds be a time interval, upgraded a business cipher key and describe in one month.
No matter take above-mentioned which kind of method that time marking is set, as long as the time marking after being provided with can the identified time interval.Preferred embodiment is that described mobile terminal television service platform is provided with time marking by giving each time interval specific I D value, be that time marking between original area is provided with certain numerical value, thereafter time interval increases progressively according to certain rules or successively decreases, such as, the ID value that described mobile terminal television service platform is given the initial time interval is 0 or 1, and the ID value of setting time interval thereafter adds 1 successively.Certainly, the method that also can adopt the natural time of the interval upper limit of direct usefulness or lower limit to identify, but with respect to giving ID value, no matter be interval sign or data comparison, all can be loaded down with trivial details relatively.
The specific embodiment that time marking is set is: zero is zero second when first day every month zero, and time marking is that the ID value value in initial time interval is 1, per 45 seconds corresponding time intervals, and its ID value is that program current cipher key identifies and adds 1 successively.Then the ID value in very first time interval is that the ID value of 1, the second time interval is that the ID value of 2, the N time intervals is N.
Then the platform of mobile terminal television service described in the step 2 uses the program current cipher key constantly pairing time marking that comes into force to generate the program current cipher key sign, such as, by the sequence-number field that the pairing time ID of the moment that will come into force gives program current cipher key, then this field is the program current cipher key sign.In order to guarantee the correct deciphering of program current cipher key, the update time of this program current cipher key can not be greater than time interval, promptly when the time interval be in 45 seconds, program current cipher key will upgrade once at per 45 seconds at least, also can upgrade once in whenever less than 45 seconds time, this point can consult to determine by mobile terminal television service platform and scrambler.
Use the program current cipher key constantly pairing time marking that comes into force to generate before the program current cipher key sign, comprise that also scrambler sends to the mobile terminal television service platform constantly with coming into force of each program current cipher key.Particularly, can coming into force with each program current cipher key constantly according to generalized time coordinate (Universal TimeCo-ordinate, be called for short UTC), be encoded to Linux java standard library (Linux Standard Base, abbreviation LSB) (Modified Julian Date correction Julian date (JD) of form, abbreviation MJD) after the timing code of sign indicating number and BCD form (promptly 8421 yards), sends to the mobile terminal television service platform.
Then coming into force of each program current cipher key behind the coding constantly is made of 40 bits, and preceding 16 be the MJD date code, and its first day from the Greenwich Mean Time (GMT) in the Gregorian calendar on November 17th, 1858 when zero; 24 of backs per 4 according to BCD coding, represent 6 time figures.For example, the 12:45:00 on October 13rd, 1993 is 0xc079124500 through the result behind the coding, and bit is encoded to:
1100?0000?0111?1001?
0001?0010?
0100?0101?
0000?0000
MJD date code 12 45 00
Like this, program current cipher key for the scrambler continual renovation, the mobile terminal television service platform with the sequence-number field that the time marking of this time interval is given program current cipher key, generates the program current cipher key sign according to the time interval that comes into force and constantly fallen into of each program current cipher key.
In order to realize encryption to program current cipher key, also need scrambler that the program current cipher key of bringing in constant renewal in is sent to the mobile terminal television service platform, encrypted by business cipher key, the process that then generates the program current cipher key sign can be carried out in the mobile terminal television service platform simultaneously, and the program current cipher key with program current cipher key sign after will encrypting then returns to scrambler; Perhaps, being encrypted in the scrambler of program current cipher key carried out, then the mobile terminal television service platform sends to scrambler with business cipher key and program current cipher key sign, finishes the operation that field is added and encrypted by scrambler.
No matter adopt above-mentioned any mode, in the program stream that scrambler sends by radio network, all carry and have program current cipher key sign and encrypted program stream keys.
In step 3, the encapsulation business cipher key term of validity can be specially to business cipher key: described mobile terminal television service platform adopts in the extended field " Key validity data " of multi-media network keying (MIKEY), with two field identifications, the initial value and the stop value of the business cipher key term of validity described respectively.Comprise for the initial value of the business cipher key term of validity and the setting of stop value: the initial value (Valid From) of TV programme starting point corresponding to the term of validity is set, the stop value (ValidTo) of the corresponding term of validity of TV programme terminating point is set, described initial value by the last time interval of the initial moment of request TV programme or the time marking of place time interval, described stop value by the termination time marking in place time interval or one time interval, back constantly of request TV programme; Select above-mentioned arbitrary initial value and arbitrary stop value, constitute the business cipher key term of validity.In being provided with of reality, this initial value and stop value combination have comparatively flexible characteristic, can select according to actual needs, have four kinds of situations.
For example, the term of validity that generates business cipher key can be specially: the initial value and the stop value that generate the term of validity, described initial value by the time marking of the last time interval in place of the initial moment of request TV programme, described stop value by the termination time marking of place time interval constantly of request TV programme.Then corresponding to this term of validity, require business cipher key to begin effectively from next time interval of initial value, promptly business cipher key can only be deciphered the program current cipher key greater than this initial value; Simultaneously, business cipher key begins to lose efficacy from stop value following a moment, and promptly this business cipher key can only be deciphered the program current cipher key that is less than or equal to this stop value, the method to set up of closing after opening before this set method can be called.
Perhaps, the term of validity that generates business cipher key can be specially: the initial value and the stop value that generate the term of validity, described initial value by the time marking of the last time interval in place of the initial moment of request TV programme, described stop value by the termination time marking in one time interval, back constantly of request TV programme; Then corresponding to this term of validity, require business cipher key to begin effectively from next time interval of initial value, business cipher key can only be deciphered the program current cipher key greater than this initial value; Simultaneously, business cipher key begins to lose efficacy from stop value, and promptly this business cipher key can only be deciphered the program current cipher key less than this stop value.The method to set up of opening after opening before this set method can be called.
Perhaps, the term of validity that generates business cipher key can be specially: the initial value and the stop value that generate the term of validity, generate the initial value and the stop value of the term of validity, described initial value by the time marking of place time interval of the initial moment of request TV programme, described stop value by the termination time marking in a time interval behind the place constantly of request TV programme.Then corresponding to this term of validity, require business cipher key to begin effectively from initial value place time interval, business cipher key can be deciphered the program current cipher key more than or equal to this initial value; Simultaneously, business cipher key begins to lose efficacy from stop value constantly, and promptly this business cipher key can only be deciphered the program current cipher key less than this stop value place time interval.The method to set up of opening after closing before this set method can be called.
Perhaps, the term of validity that generates business cipher key can be specially: the initial value and the stop value that generate the term of validity, generate the initial value and the stop value of the term of validity, described initial value by the time marking of place time interval of the initial moment of request TV programme, described stop value by the termination time marking of place time interval constantly of request TV programme.Then corresponding to this term of validity, require business cipher key to begin effectively from initial value place time interval, business cipher key can be deciphered the program current cipher key more than or equal to this initial value; Simultaneously, next begins to lose efficacy business cipher key constantly from stop value, and promptly this business cipher key can only be deciphered the program current cipher key that is less than or equal to this stop value place time interval.The method to set up of closing after closing before this set method can be called.
The specific embodiment that closes after opening before one is: when program current cipher key sign adopted the mode of ID value, when Valid From value is 0, Valid To value was 3, and then to can be used for deciphering program current cipher key ID value be 1,2,3 program current cipher key to business cipher key.
Simultaneously, the process of described step 4 deciphering is: whether business cipher key at first mates the program current cipher key sign and falls in the business cipher key term of validity, is then program current cipher key to be decrypted, and with the program current cipher key after the deciphering program stream is decrypted again; Otherwise the refusal deciphering guarantees that user's mandate is watched.
Said method can guarantee the decoding to program current cipher key, and its relation can be referring to Fig. 3 time, in said method, and the schematic diagram of the time marking and the business cipher key term of validity.In the present embodiment, adopt and upgraded a time marking in per 45 seconds, zero is zero second when first day every month zero, and time marking is that the ID value value in initial time interval is 1, and the ID value is that program current cipher key identifies and adds 1 successively thereafter.For the program current cipher key update time that receives, be respectively x1, x2, x3...... constantly according to coming into force of each program current cipher key shown in the figure; Then the program current cipher key of x1 is designated N-2, and the program current cipher key of x2 is designated N-1, and the program current cipher key of x3 is designated N.When receiving the authorization requests of portable terminal, the mobile terminal television service platform is according to the beginning and ending time t1 and the t2 of request TV programme, determine the time interval at place respectively, then the mobile terminal television service platform is according to time interval, generate the business cipher key term of validity, being specially term of validity initial value is N-2, and the expiration of limitation period value is M, and is encapsulated in the business cipher key.Then effectively program current cipher key be designated N-1, N ... M, promptly can decipher and be designated the program current cipher key of N-1 to M, be the situation of closing after preceding opening.If generate the business cipher key term of validity, being specially term of validity initial value is N-1, and the expiration of limitation period value is M, then effectively the program current cipher key sign still be N-1, N ... M, the situation of closing after closing before Here it is.Obviously, under above-mentioned situation, business cipher key can be deciphered and be designated the program current cipher key of N-1 to M, promptly can decipher x2, x3......, thereby the program current cipher key that guarantees the deciphering acquisition can be deciphered program stream.Those skilled in the art can be according to actual needs, one or more to the interval forwards, backwards respectively expansion of the business cipher key term of validity of above-mentioned four kinds of situations, such as, in this example, before the situation of closing after opening initial value can be made as N-3, stop value is made as M+1, and this expansion does not influence technical scheme provided by the present invention.
When this business cipher key deciphering program current cipher key was adopted in the requesting terminal, business cipher key was searched program current cipher key to be decoded according to the program current cipher key sign, and its time keeps fully synchronously.
The present invention also provides a kind of system that is provided with of TV program stream secrete key of mobile terminal, as shown in Figure 4, comprises the scrambler B and the mobile terminal television service platform A of intercommunication mutually, and wherein the mobile terminal television service platform comprises:
Time marking is provided with modules A 1, is used to carry out the division of time interval, and time marking is set for each time interval;
The program current cipher key sign is provided with modules A 2, with described time marking modules A 1 being set is connected, being used to receive the program current cipher key that scrambler B sends comes into force constantly, and according to coming into force constantly the time corresponding sign generates the program current cipher key sign, and return to scrambler B and program stream and program current cipher key and together broadcast;
Business cipher key term of validity generation module A3, with time marking modules A 1 being set is connected, be used for authorization requests according to the portable terminal that receives, the time interval at place is distinguished in the start-stop of definite TV programme of asking constantly, generates the business cipher key term of validity and be encapsulated into to send to described portable terminal in the business cipher key; Described business cipher key is carried out decryption oprerations to the program current cipher key that the program current cipher key sign is in the business cipher key term of validity.
It should be noted that at last: above embodiment is only in order to technical scheme of the present invention to be described but not limit it, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that: it still can make amendment or be equal to replacement technical scheme of the present invention, and these modifications or be equal to replacement and also can not make amended technical scheme break away from the spirit and scope of technical solution of the present invention.
Claims (8)
1, a kind of method to set up of TV program stream secrete key of mobile terminal is characterized in that may further comprise the steps:
The mobile terminal television service platform carries out the division of time interval, for each time interval is provided with time marking;
Described mobile terminal television service platform uses the program current cipher key constantly pairing time marking that comes into force to generate the program current cipher key sign, and described program current cipher key sign and program stream and use business cipher key encrypted program stream keys are together broadcasted; Ciphered program stream in described program current cipher key is used for coming into force constantly to described program current cipher key is deciphered;
When receiving the authorization requests of portable terminal, the mobile terminal television service platform is according to the start-stop of the request TV programme time interval at place respectively constantly, generates the business cipher key term of validity and be encapsulated into to send to described portable terminal in the business cipher key; Described business cipher key is used for the program current cipher key that the program current cipher key sign is in the business cipher key term of validity is carried out decryption oprerations.
2, method according to claim 1 is characterized in that the division that described mobile terminal television service platform carries out time interval comprises: described mobile terminal television service platform is a starting point with business cipher key updated time each time, resets time marking.
3, method according to claim 2 is characterized in that also comprising: described mobile terminal television service platform is provided with the update cycle of business cipher key, and the merchant of the maximum indicating value of described business cipher key update cycle and time marking is less than or equal to time interval.
4, method according to claim 1 is characterized in that comprising for each time interval is provided with time marking: described mobile terminal television service platform is provided with time marking by giving each time interval specific I D value.
5, method according to claim 4 is characterized in that it is 0 or 1 that described mobile terminal television service platform is given the ID value in initial time interval, and the ID value of setting time interval thereafter adds 1 successively.
6, according to the arbitrary described method of claim 1-5, it is characterized in that using the program current cipher key constantly pairing time marking that comes into force to generate before the program current cipher key sign, comprise that also scrambler sends to the mobile terminal television service platform constantly with coming into force of each program current cipher key.
7, according to the arbitrary described method of claim 1-5, it is characterized in that generating the business cipher key term of validity is specially: the initial value and the stop value that generate the term of validity, described initial value by the last time interval of the initial moment of request TV programme or the time marking of place time interval, described stop value by the termination time marking in place time interval or one time interval, back constantly of request TV programme; Select above-mentioned arbitrary initial value and arbitrary stop value, constitute the business cipher key term of validity.
8, a kind of system that is provided with of TV programs to mobile terminal key comprises the scrambler and the mobile terminal television service platform that intercom mutually; It is characterized in that described mobile terminal television service platform comprises:
Time marking is provided with module, is used to carry out the division of time interval, and time marking is set for each time interval;
The program current cipher key sign is provided with module, with described time marking module being set is connected, being used to receive the program current cipher key that scrambler sends comes into force constantly, and according to the time corresponding sign generation program current cipher key sign constantly that comes into force, and return to scrambler and program stream and use the business cipher key encrypted program stream keys together to broadcast; Ciphered program stream in described program current cipher key is used for coming into force constantly to described program current cipher key is deciphered;
Business cipher key term of validity generation module, with described time marking module being set is connected, be used for authorization requests according to the portable terminal that receives, the time interval at place is distinguished in the start-stop of definite TV programme of asking constantly, generates the business cipher key term of validity and be encapsulated into to send to described portable terminal in the business cipher key; Described business cipher key is used for the program current cipher key that the program current cipher key sign is in the business cipher key term of validity is carried out decryption oprerations.
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| CN200710064179A CN100583990C (en) | 2007-03-05 | 2007-03-05 | Setup method and setup system for TV program stream secrete key of mobile terminal |
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| CN200710064179A CN100583990C (en) | 2007-03-05 | 2007-03-05 | Setup method and setup system for TV program stream secrete key of mobile terminal |
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| CN102045160B (en) * | 2009-10-15 | 2013-05-15 | 中国移动通信集团公司 | Method and equipment for updating service key |
| CN101827247B (en) * | 2010-05-19 | 2013-09-11 | 中兴通讯股份有限公司 | Method and system for accounting mobile TV |
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