Digital television program playing method and device based on missing key

A technology of digital television and playback method, applied in the computer field, can solve the problems of poor security effect and many times of encryption, and achieve the effect of reducing the times of encryption and reducing cost

Active Publication Date: 2021-10-22
深圳佳力拓科技有限公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the one-way network has low cost and easy structure, but it is not suitable for the transmission of encrypted digital TV signals due to its characteristics of non-differential signal transmission; and if the two-way network uses symmetric encryption technology to encrypt and transmit digital TV signals, its security The effect is not good. If asymmetric encryption technology is used to encrypt and transmit digital TV signals, then when the number of digital TV signal receiving ends is too large, there will be a problem of too many times of encryption (because when using asymmetric encryption technology, multiple numbers The TV signal receiver corresponds to multiple keys, so the original digital TV signal needs to be encrypted multiple times with multiple keys, and the number of times is equal to the number of digital TV signal receivers)

Method used

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  • Digital television program playing method and device based on missing key
  • Digital television program playing method and device based on missing key
  • Digital television program playing method and device based on missing key

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Embodiment Construction

[0053] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0054] refer to figure 1 , the embodiment of the present application provides a method for playing a digital television program based on an absent key, comprising the following steps:

[0055] S1. The p digital TV playback terminals respectively obtain instructions to play the same digital TV program, and receive the same encrypted digital signal through the preset one-way network; the encrypted digital signal uses the same master key to pair the digital Obtained by encrypting TV programs; p is an integer greater than 2;

[0056] S2. Receive p slave keys through a preset...

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Abstract

The invention discloses a digital television program playing method based on an absent key, and the method comprises the steps: obtaining an instruction for playing the same digital television program, and receiving a same encrypted digital signal; receiving p slave keys; performing message digest calculation on the hidden symbol string group to correspondingly obtain p message digest groups; respectively carrying out abstract extraction processing to obtain p extracted abstract sets; performing combination processing to obtain p missing keys; correspondingly obtaining p inherent message digests; correspondingly extracting p pieces of missing data from the p inherent message digests, and filling the p pieces of missing data into p missing keys to obtain p complete keys; obtaining p verification message abstracts; and recording the complete key obtained by calculation as a main key, and performing decryption processing on the encrypted digital signals by adopting the main key so as to play the digital television program, so that the transmission cost of the encrypted digital signals is reduced, and the number of times of encryption is reduced.

Description

technical field [0001] This application relates to the field of computers, in particular to a method, device, computer equipment and storage medium for playing digital TV programs based on absent keys. Background technique [0002] During the development of digital TV technology, one-way network and two-way network appeared. Among them, the one-way network has low cost and easy structure, but it is not suitable for the transmission of encrypted digital TV signals due to its characteristics of non-differential signal transmission; and if the two-way network uses symmetric encryption technology to encrypt and transmit digital TV signals, its security The effect is not good. If asymmetric encryption technology is used to encrypt and transmit digital TV signals, then when the number of digital TV signal receiving ends is too large, there will be a problem of too many times of encryption (because when using asymmetric encryption technology, multiple numbers The TV signal receive...

Claims

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Application Information

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IPC IPC(8): H04L9/08H04N21/4405
CPCH04L9/0894H04N21/4405
Inventor 熊明霞廖佳秋
Owner 深圳佳力拓科技有限公司
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