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Key updating method based on no return link and applied to unidirectional broadcast network

A key update and broadcast network technology, applied to key distribution, can solve the problems of receiving terminal equipment without a backhaul link, unsuitable for a one-way broadcast network, and difficult to confirm key update and synchronization activation in both directions. Strong, cost-effective effect

Active Publication Date: 2018-07-13
NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional one-way broadcast network (such as terrestrial digital TV network) has the advantages of high bandwidth and one-way traffic. If it is necessary to protect the transmission data in the one-way broadcast network, an encryption and decryption mechanism needs to be added. However, due to the one-way The receiving terminal equipment of the broadcast network does not have a backhaul link, so it is difficult to use a two-way confirmation method for key update and synchronous activation. The traditional key update method is not suitable for a one-way broadcast network

Method used

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  • Key updating method based on no return link and applied to unidirectional broadcast network

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Experimental program
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Embodiment 1

[0047] Embodiment one: if figure 1 As mentioned above, the large-scale key update process of the unidirectional broadcast network is as follows:

[0048] 1) When the key management center needs to update the key, it will issue the updated key pair (including signature private key PK2 and signature verification public key dk2) to To encrypt the device, the old signature private key PK1 and signature verification public key dk1 are normally used.

[0049] 2) After the encryption device identifies the key pair that needs to be updated through the key management protocol, it uses the updated private key PK2 to sign the signature verification public key dk2 to obtain the signature information SIG{dk2}PK2, and uses the updated signature public key dk2, The signature information SIG{dk2}PK2 of the updated signature public key and the data information SIG{data information}PK1 to be protected signed by the old signature private key are encrypted using the domestic commercial cryptogra...

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Abstract

The invention relates to the field of network key updating, in particular to a key updating method based on a no return link and applied to a unidirectional broadcast network. The key updating methodbased on the no return link and applied to the unidirectional broadcast network comprises the following steps: a decryption device arranged before a receiving terminal and the receiving terminal perform first time decryption on the first time encrypted encapsulation data; then the decryption device and the receiving terminal perform the first time check on the decrypted data and pass through, so as to obtain the updated check public key; the receiving terminal stores the updated check public key, and the decryption device sends back the updated check public key; the key management center sendsa updated key enable signaling after confirming the success of the updating according to the updated check public key; the receiving terminal performs second time decryption on the second time encrypted encapsulation data sent by an encryption device; and the receiving terminal enables the updated check public key after the second check of the receiving terminal is successful.

Description

technical field [0001] The invention relates to the field of network key update, in particular to a key update method based on a non-backhaul link and applied to a one-way broadcast network. Background technique [0002] The traditional one-way broadcast network (such as terrestrial digital TV network) has the advantages of high bandwidth and one-way traffic. If it is necessary to protect the transmission data in the one-way broadcast network, an encryption and decryption mechanism needs to be added. However, due to the one-way The receiving terminal equipment of the broadcast network does not have a backhaul link, so it is difficult to use a two-way confirmation method for key update and synchronous activation. The traditional key update method is not suitable for a one-way broadcast network. . Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a key update method based on no return link in view of the above exist...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L9/08H04L9/32H04W12/04H04W12/03H04W12/0433
CPCH04L9/0825H04L9/0891H04L9/3247H04L63/0478H04L63/064H04W12/04
Inventor 苏宏陈周国郭宇斌孙恩博丁建伟刘义铭
Owner NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP