CN1333520A - Encrypting and user anthority identifying method for single direction data broadcasting system - Google Patents
Encrypting and user anthority identifying method for single direction data broadcasting system Download PDFInfo
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- CN1333520A CN1333520A CN 00119443 CN00119443A CN1333520A CN 1333520 A CN1333520 A CN 1333520A CN 00119443 CN00119443 CN 00119443 CN 00119443 A CN00119443 A CN 00119443A CN 1333520 A CN1333520 A CN 1333520A
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Abstract
The present invention provides a method for encryption of one-way data broadcast system and use authority discrimination, and is characterized by that it includes a server terminal, at said server terminal the file data can be cut into data frames, the transmission cipher data can be added and the data frames can be transmitted to user; and a user terminal, at said user terminal the data frames can be received, and the transmission cipher data contained in the data frames can be taken out, then the user cipher inputted by user and card number of received card are undergone the process of either-or operation so as to obtain decoding cipher code, and the decoding cipher code can be compared with transmission cipher data, if they are identical, the data frames can be continuously received, if they are not identical, the receiving of data frames can be rlinquished. Said invented method can ensure the benefit of network business man, and can implement charge receiving of file data.
Description
The present invention relates to a kind of data encryption and subscription authentication, relate in particular to a kind of encryption and user anthority identifying method that is used for single direction data broadcasting system.
Information encryption and user ' s right protection are that one-way broadcast systems is difficult to deal with problems always.There are not the problems referred to above in the data message that is used for public welfare in single direction data broadcasting system (for example cable television system) broadcasting.But wish to increase certain this value-added Virtual network operator for those, then must consideration how to encrypt but the while can be protected the problem of user ' s right again well.
The object of the present invention is to provide a kind of encryption and user anthority identifying method that is used for single direction data broadcasting system, its method is simple, has guaranteed the income of Virtual network operator.
Encryption and the user anthority identifying method that is used for single direction data broadcasting system provided by the invention comprises the following step:
At server end, file data is divided into Frame;
In described Frame, add the transmission code data;
Described Frame is sent to the user by single direction data broadcasting system;
At user side, utilize receiving card to receive described Frame, and take out the described transmission code data that is included in the described Frame;
The user cipher of user's input and the card number of described receiving card are carried out computing, obtain the decoding password;
Described decoding password and described transmission code data are compared;
If described decoding password is consistent with described transmission code data, then continue to receive described Frame; Otherwise abandon receiving described Frame.
As mentioned above, the user can not receive message file under the situation of not knowing its user cipher or password bad.If obtain correct password, the user can obtain password from Virtual network operator after taking to the Virtual network operator payment information.Can guarantee the economic interests of Virtual network operator so effectively.Network operation merchant also can according to circumstances change password.
Describe embodiments of the invention in detail below in conjunction with accompanying drawing.In the accompanying drawing:
Fig. 1 is the encryption of single direction data broadcasting system and the process flow diagram of user anthority identifying method of being used for of the present invention.
As shown in Figure 1, method of the present invention is at first at server end, becoming Frame (step S1) by the file division of single direction data broadcasting system transmission.In the following description, will be as an example with television broadcasting system.After the file division of transmitting becomes Frame, be loaded into the field retrace of TV signal and send in capable.But, should be appreciated that except television broadcasting system, also can adopt other single direction data broadcasting system, for example cable tv broadcast, station broadcast etc.
For television broadcasting system, file division should be become the Frame of a plurality of 42 byte longs.First frame of these Frames generally includes various information, for example main address of filename, file size, storage file, subaddressing etc., and each later frame is the data of include file content.Method of the present invention also joins the transmission code data in this first frame (step S2).But it is not necessary that the transmission code data is joined in first frame, and this is a kind of preferable mode, can join fully in other Frame yet, for example, and last frame, perhaps second frame.For the length of transmission code data, generally get 4 bytes.Certainly, also can increase or reduce the length of transmission code data according to actual needs, all be to realize technically.Usually, the length of transmission code data is long more, and the reliability of encryption is high more.
After having formed above-mentioned Frame, these Frames be loaded into the field retrace of TV signal capable on, then, be transferred to user (step S3) with TV signal.
At user side, the user can utilize receiving card to receive these Frames that are carried in the TV signal, and takes out the transmission code data (step S4) that is included in the Frame.
Then, at user side, the user cipher of user's input and the card number of receiving card are carried out computing, password (step S5) obtains decoding.General computing can be adopted the XOR mode, and the user cipher and the card number that are about to user's input carry out XOR.Can certainly adopt other compute mode, for example carry out XOR earlier, ask non-etc. then.
Should be appreciated that above-mentioned step S4 obtains the sequencing that transmission password and step S5 try to achieve the decoding password and can change.Above this is described as obtaining earlier transmission password (step S4) in proper order, tries to achieve decoding password (step S5) then, in fact also can rescue earlier is decoding password (step S5), and then obtains transmission password (step S4); Perhaps two steps are carried out simultaneously.
After transmission password that obtains and decoding password, at step S6 this two password relatively.
If the comparative result of step S6 is consistent, then continue receiving data frames (step S7); If inconsistent, then abandon receiving data frames (step S8).
In order to make encryption that is used for single direction data broadcasting system of the present invention and the user anthority identifying method can be compatible mutually with general non-encrypted information, can add the file type byte in Frame, the file type byte is in the encryption type of indication this document: encrypt or do not encrypt.Generally, the file type byte is 0000, and expression this document is not encrypted, and other represents that then this document is an encrypt file.
Like this, the user should detect the content of this document type byte earlier before obtaining the transmission password, when content representation this document of file type byte is encrypt file, then proceed the step of back, the transmission password of acquisition and decoding password, relatively waited.If content representation this document of file type byte is non-encrypted file, then user side can no longer be carried out the step of back, directly receives this document.
After utilizing method of the present invention to come transfer files,, have only to have obtained after the user, could normally receive encrypted file for the user.Like this, Virtual network operator just can be managed its charge by password.That is to say,, must arrive first the Virtual network operator place and buy password if the user will receive these encrypted files.
In addition, Virtual network operator can for example every a week, one month or a season, 1 year, or change ground transmission password termly aperiodically, and the user need continue to receive new file, then must continue to buy user cipher.And, for the file of different content, can adopt different transmission passwords, realize that graduation is encrypted to file content.
Owing to will try to achieve the decoding password after user cipher and the card number computing in the method for the present invention, therefore, each user cipher is only effective on corresponding receiving card.
Claims (8)
1, a kind of encryption and user anthority identifying method that is used for single direction data broadcasting system comprises the following step:
At server end, file data is divided into Frame;
In described Frame, add the transmission code data;
Described Frame is sent to the user by single direction data broadcasting system;
At user side, utilize receiving card to receive described Frame, and take out the described transmission code data that is included in the described Frame;
The user cipher of user's input and the card number of described receiving card are carried out computing, obtain the decoding password;
Described decoding password and described transmission code data are compared;
If described decoding password is consistent with described transmission code data, then continue to receive described Frame; Otherwise abandon receiving described Frame.
2, encryption and the user anthority identifying method that is used for single direction data broadcasting system as claimed in claim 1 is characterized in that, adds described transmission code data in first frame of described Frame.
3, encryption and the user anthority identifying method that is used for single direction data broadcasting system as claimed in claim 1 is characterized in that, described transmission password is that nybble is long.
4, encryption and the user anthority identifying method that is used for single direction data broadcasting system as claimed in claim 1 is characterized in that, also comprises a file type byte in the described Frame, is used to indicate the encryption type of described file.
5, encryption and the user anthority identifying method that is used for single direction data broadcasting system as claimed in claim 4, it is characterized in that, at user side, before taking-up is included in described transmission code data in the described Frame, detect the file type byte in the described Frame, if described file type byte representation this document is non-encrypted file, then directly receives described file, and do not carry out the computing and the comparison of user cipher at user side.
6, encryption and the user anthority identifying method that is used for single direction data broadcasting system as claimed in claim 1 or 2 is characterized in that, transmits described Frame by television broadcasting system.
7, encryption and the user anthority identifying method that is used for single direction data broadcasting system as claimed in claim 6 is characterized in that, loads described Frame on the field retrace of described TV signal is capable.
8, encryption and the user anthority identifying method that is used for single direction data broadcasting system as claimed in claim 1 or 2 is characterized in that, the card number of described user cipher and described receiving card is carried out XOR, obtains described decoding password.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00119443 CN1333520A (en) | 2000-07-11 | 2000-07-11 | Encrypting and user anthority identifying method for single direction data broadcasting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00119443 CN1333520A (en) | 2000-07-11 | 2000-07-11 | Encrypting and user anthority identifying method for single direction data broadcasting system |
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| Publication Number | Publication Date |
|---|---|
| CN1333520A true CN1333520A (en) | 2002-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 00119443 Pending CN1333520A (en) | 2000-07-11 | 2000-07-11 | Encrypting and user anthority identifying method for single direction data broadcasting system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8190896B2 (en) | 2004-11-19 | 2012-05-29 | Lg Electronics Inc. | Conditional access for a multimedia broadcast service using a wireless terminal |
| CN103916242A (en) * | 2012-12-30 | 2014-07-09 | 北京握奇数据系统有限公司 | Encryption and decryption method of transmission data based on audio interface |
-
2000
- 2000-07-11 CN CN 00119443 patent/CN1333520A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8190896B2 (en) | 2004-11-19 | 2012-05-29 | Lg Electronics Inc. | Conditional access for a multimedia broadcast service using a wireless terminal |
| CN103916242A (en) * | 2012-12-30 | 2014-07-09 | 北京握奇数据系统有限公司 | Encryption and decryption method of transmission data based on audio interface |
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