Set-top box program recording and playback method and system

Abstract

The invention discloses a set-top box based program recording and playback method and system. The set-top box based program recording and playback method comprises the steps of judging whether a program is a scrambled program when a program recording request is detected; if the program is the scrambled program, obtaining an intelligent card with permission to descramble the program and carrying out secondary encrypted storage for a recorded file based on a descriptor; if the program is not the scrambled program, carrying out encrypted storage for the recorded file by using a universal key; after a playback request instruction of the recorded file is detected, judging whether the program is the scrambled program; if the program is the scrambled program, obtaining the intelligent card with permission to descramble the program and carrying out decrypted playback for the recorded file based on the descriptor of the program; and if the program is not the scrambled program, carrying out decrypted playback for the record file by using the universal key. According to the set-top box based program recording and playback method, the recorded file can be subjected to secondary encryption, other set-top boxes having permission of the program also can play back the recorded file while the safety of the recorded file is guaranteed, and convenience is brought to program recording and playback of the user.

Description

technical field [0001] The invention relates to the technical field of set-top boxes, in particular to a set-top box-based program recording and playback method and system. Background technique [0002] The recording function of set-top boxes is becoming more and more popular. For security reasons, recorded files generally need to be stored twice encrypted, so that the recorded programs can only be played on the set-top box to protect the interests of operators. [0003] At present, the commonly used method for secondary encryption of recorded files by set-top boxes is to use the hardware ID of the set-top box (such as the chipID of the main chip) as the key of the encryption algorithm to encrypt and store the recorded files. When playing back, read the hardware ID first, and then use the corresponding decryption algorithm to decrypt and playback the recorded file. Encryption and decryption are also realized through the hardware algorithm of the set-top box. The program rec...

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a program recording and playback method and system based on a set-top box, aiming at solving the problem that the recorded program can only be recorded in the encrypted set-top box after the encryption algorithm of the recorded file of the set-top box in the prior art is encrypted. When there is a problem with the encrypted set-top box, the recorded program cannot be played, and the user cannot watch the recorded program through other devices, which brings inconvenience to the technical problem for the user to watch the recorded program

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