CN203233428U - Digital signal safety encryption system - Google Patents
Digital signal safety encryption system Download PDFInfo
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- CN203233428U CN203233428U CN 201320270301 CN201320270301U CN203233428U CN 203233428 U CN203233428 U CN 203233428U CN 201320270301 CN201320270301 CN 201320270301 CN 201320270301 U CN201320270301 U CN 201320270301U CN 203233428 U CN203233428 U CN 203233428U
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Abstract
The utility model discloses a digital signal safety encryption system. The digital signal safety encryption system comprises a content data source, an encryption system, a key generator, a key distribution server, a content distribution server and a network set-top box, wherein the encryption system is connected with the content data source and the key generator and is connected with the content distribution server for outputting encrypted content data thereto; and the data distribution server and the key distribution server are connected with the network set-top box. With the digital signal safety encryption system, an encrypted key for encryption transmission may be updated in a real-time manner so that the key soon fails even if declassified and copied by a set-top box user, safety and reliability of encrypted content may be secured, and an illegal user is effectively prevented from obtaining the transmitted encrypted content.
Description
Technical field
The utility model relates to field of information security technology, particularly a kind of digital signal secure encryption system.
Background technology
When media contents such as digital television program are issued with compensation, need to adopt the mode of encrypted transmission, video, audio signal are encrypted with cryptographic algorithm and the encryption key that presets, pass through digital TV network or internet transmission then to set-top box.The decipherment algorithm that configuration and above-mentioned cryptographic algorithm are complementary in the decipher of the set-top box inside of validated user, and in the register of set-top box, store decruption key, thus described video, audio signal can normally be deciphered, and then decode and play.Even if but not validated user is linked into digital TV network or the Internet privately, receives described video, audio signal, but because it can not be deciphered, can not normally watch program.
But the decruption key that is built in the set-top box register is easy to illegally be cracked and read.In case it is copied on the set-top box of other non-validated user, these non-validated users can be deciphered and TV reception equally.Therefore, existing ciphered program resist technology does not have fail safe and the reliability of height, is broken easily and content providers is incurred loss.
The utility model content
For this reason, the utility model proposes a kind of digital signal secure encryption system, this system can real-time update be used for the encryption key of encrypted transmission, even thereby make key be cracked and copy by set-top box users, also can lose efficacy rapidly, thereby guaranteed fail safe and the reliability of encrypted content, can prevent effectively that non-validated user from obtaining the encrypted content of transmission.
Digital signal secure encryption system described in the utility model, it is characterized in that, comprise content-data source, encryption system, key generator, cipher key distribution server, content distribution server and networking set-top box, described encryption system connects described content-data source and key generator, and connect and will encrypt after content-data output to content distribution server, described content distribution server is connected the set-top box of networking with the cipher key distribution server.
Preferably, described encryption system comprises first encryption equipment, second encryption equipment and signal stream synthesizer.
Further preferably, described key generator connects described first encryption equipment and second encryption equipment respectively by two-way key outlet line, and described key generator connects described cipher key distribution server respectively by two-way cipher key distribution circuit.
Further preferably, described networking set-top box comprises first tuner, second tuner, first decipher, second decipher, key receiving element, key deposit unit and output recognition unit.
Preferably, described cipher key distribution server connects described networking set-top box by the Internet.
Preferably, described content distribution server connects described networking set-top box by catv network.
Thereby, the utility model can be encrypted and audio content data is looked in transmission with the encryption key of real-time update, and the encryption key that upgrades is issued by the server networking, legal set-top box can be connected to the encryption key that server is obtained renewal, and illegal user does not then have Connection Service device and the authority of new key more.Further, the utility model adopts the two-way encryption mode, for the two-way content stream data is encrypted respectively with different keys, set-top box receives the key corresponding with one tunnel content stream data randomly, and the two-way content stream data is decrypted, by output recognition unit output road video flowing correctly deciphered of identification and output automatically.The utility model has guaranteed fail safe and the reliability of encrypted content, can prevent effectively that non-validated user from obtaining the encrypted content of transmission.
Description of drawings
Fig. 1 is the entire system structural representation according to the utility model embodiment;
Fig. 2 is the networking set-top box structural representation according to the utility model embodiment.
Embodiment
With reference to the accompanying drawings the utility model is described more fully, exemplary embodiment of the present utility model wherein is described.
The utility model proposes a kind of digital signal secure encryption system, this system can real-time update be used for the encryption key of encrypted transmission, even thereby make key be cracked and copy by set-top box users, also can lose efficacy rapidly, thereby guaranteed fail safe and the reliability of encrypted content, can prevent effectively that non-validated user from obtaining the encrypted content of transmission.
Fig. 1 is the entire system structural representation of the utility model embodiment.As shown in Figure 1, digital signal secure encryption system described in the utility model has content-data source 1, and this content-data source 1 is that TV station etc. looks, the program server of audio content provider, has wherein stored the video and audio content data.Encryption system 2 is obtained from content-data source 1 will be transferred to the content that set-top box is play, and obtains encryption key from key generator 3, and then realizes the transmission of content-data is encrypted.Wherein, the key that described key generator 3 produces is regularly to upgrade, thereby traffic encryption key is among the continuous variation, even key is illegally obtained and copied like this, also can lose efficacy rapidly, make the disabled user can not watch the ciphered program content for a long time.
As shown in Figure 1, encryption system 2 adopts the two-way encryption mechanism, and its inside has the first encryption equipment 2a, the second encryption equipment 2b and signal stream synthesizer 2c.Described key generator 3 connects the described first encryption equipment 2a and the second encryption equipment 2b respectively by two-way key outlet line, thereby provides the encryption key that differs from one another for the first encryption equipment 2a and the second encryption equipment 2b.The two-way encrypted video stream that produces after the first encryption equipment 2a and the second encryption equipment 2b encrypt is respectively merged into one road content signal stream by signal stream synthesizer 2c, is sent to networking set-top box 6 by content distribution server 5 then.
Described content distribution server 5 connects described networking set-top box 6 by catv network, realizes multicast or the program request transmission of encrypted content data.
Key generator 3 connects described cipher key distribution server 4 respectively by two-way cipher key distribution circuit, and cipher key distribution server 4 connects described networking set-top box 6 by the Internet; And this cipher key distribution server 4 selects at random from the two-way key that riches all the way gives networking set-top box 6.
Fig. 2 is the networking set-top box structural representation according to the utility model embodiment.Described networking set-top box 6 comprises the first tuner 6a, the second tuner 6b, the first decipher 6c, the second decipher 6d, key receiving element 6f, key deposit unit 6g and output recognition unit 6e.Again separated at networking set-top box 6 places by the encrypted content data stream behind content distribution server 5 transmission synthetic, and import the first tuner 6a or the second tuner 6b respectively and carry out tuningly, input to the first decipher 6c or the second decipher 6d then respectively.Key receiving element 6f receives the key of cipher key distribution server 4 cloth of selecting at random from the two-way key that riches all the way by the Internet, deposits it in key deposit unit 6g, as the FLASH memory; The first decipher 6c and the second decipher 6d therefrom read key and the content-data of encrypted transmission are decrypted, and the obvious first decipher 6c and the second decipher 6d can only have one the road correctly to decipher the acquisition content-data, and another road then can successful decryption.Thereby output recognition unit 6e identifies from the two-way decipher automatically and select a road correct decrypted data signal to export.Like this, even the key among the key deposit unit 6g is cracked and copied, also can very fast inefficacy, and also the disabled user also can't guarantee correctly to use the key that cracks before inefficacy, has further promoted fail safe and reliability.
Thereby, the utility model can be encrypted and audio content data is looked in transmission with the encryption key of real-time update, and the encryption key that upgrades is issued by the server networking, legal set-top box can be connected to the encryption key that server is obtained renewal, and illegal user does not then have Connection Service device and the authority of new key more.Further, the utility model adopts the two-way encryption mode, for the two-way content stream data is encrypted respectively with different keys, set-top box receives the key corresponding with one tunnel content stream data randomly, and the two-way content stream data is decrypted, by output recognition unit output road video flowing correctly deciphered of identification and output automatically.The utility model has guaranteed fail safe and the reliability of encrypted content, can prevent effectively that non-validated user from obtaining the encrypted content of transmission.
Above content only is preferred embodiment of the present utility model, for those of ordinary skill in the art, according to thought of the present utility model, the part that all can change in specific embodiments and applications, this description should not be construed as restriction of the present utility model.
Claims (6)
1. digital signal secure encryption system, it is characterized in that, comprise content-data source, encryption system, key generator, cipher key distribution server, content distribution server and networking set-top box, described encryption system connects described content-data source and key generator, and connect and will encrypt after content-data output to content distribution server, described content distribution server is connected the set-top box of networking with the cipher key distribution server.
2. digital signal secure encryption system according to claim 1 is characterized in that, described encryption system comprises first encryption equipment, second encryption equipment and signal stream synthesizer.
3. digital signal secure encryption system according to claim 2, it is characterized in that, described key generator connects described first encryption equipment and second encryption equipment respectively by two-way key outlet line, and described key generator connects described cipher key distribution server respectively by two-way cipher key distribution circuit.
4. digital signal secure encryption system according to claim 3, it is characterized in that described networking set-top box comprises first tuner, second tuner, first decipher, second decipher, key receiving element, key deposit unit and output recognition unit.
5. digital signal secure encryption system according to claim 1 is characterized in that, described cipher key distribution server connects described networking set-top box by the Internet.
6. digital signal secure encryption system according to claim 1 is characterized in that, described content distribution server connects described networking set-top box by catv network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320270301 CN203233428U (en) | 2013-05-16 | 2013-05-16 | Digital signal safety encryption system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320270301 CN203233428U (en) | 2013-05-16 | 2013-05-16 | Digital signal safety encryption system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203233428U true CN203233428U (en) | 2013-10-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320270301 Expired - Lifetime CN203233428U (en) | 2013-05-16 | 2013-05-16 | Digital signal safety encryption system |
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| Country | Link |
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| CN (1) | CN203233428U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103686333A (en) * | 2013-12-19 | 2014-03-26 | 深圳市九洲电器有限公司 | Audio video protecting method and audio video terminal |
-
2013
- 2013-05-16 CN CN 201320270301 patent/CN203233428U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103686333A (en) * | 2013-12-19 | 2014-03-26 | 深圳市九洲电器有限公司 | Audio video protecting method and audio video terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131009 |