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A key update method based on non-backhaul 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: 2021-04-27
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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  • A key update method based on non-backhaul link and applied to unidirectional broadcast network

Examples

Experimental program
Comparison scheme
Effect test

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 update, in particular to a key update method based on a non-backhaul link and applied to a one-way broadcast network. In the present invention, the decryption device and the receiving end are arranged before the receiving end to perform the first decryption of the first encrypted and encapsulated data, and then the decrypting device and the receiving end perform the first signature verification according to the decrypted data to obtain an updated verification Sign the public key; then the receiving end stores the updated signature verification public key, and the decryption device sends back the updated signature verification public key; after the key management center confirms that the update is successful according to the updated signature verification public key, it sends the update key enabling signaling; The receiving end decrypts the second encrypted and encapsulated data sent by the encryption device for the second time, and after the second signature verification by the receiving end succeeds, the receiving end enables to update the public key for signature verification.

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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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L9/08H04L9/32H04W12/0433H04W12/03
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