Method for synchronizing clock of digital copyright management terminal and server

Abstract

The invention discloses a method synchronizing a digital rights management terminal with a server clock, which comprises a, confirming the C-SRTC of DRM terminal, and judging whether the DRM terminal needs to be clock synchronous with the DRM server, if needs, enters procedure b, otherwise directly entering procedure c. b, the DRM terminal determines differential value of the C-SRTC and S-RTC, namely SC-DCP. c, checking C-RTC regularly, at each checking time, if the C-RTC is modified, updating the differential value of the C-SRTC and the S-RTC according to modifying value, namely CC-DCP, otherwise, the C-SRTC increases timing length. The technical scheme of the invention increases the efficiency of clock synchronization on the basis of ensuring the accuracy of clock synchronization.

Description

technical field [0001] The invention relates to the field of DRM (Digital Rights Management, digital rights management), in particular to a method for clock synchronization between a DRM terminal and a server. Background technique [0002] With the development of broadband Internet technology, users often download various data on the network through various terminals, such as videos and games. Among them, some data is protected by copyright, and DRM technology is just to prevent data piracy and illegal copying, thereby safeguarding the legitimate rights and interests of users and content publishers. [0003] Due to the different data usage rights and charging standards, DRM defines many different copyright rules to limit user use and assist billing, such as use per view, use by start and end time, use by cumulative time, etc. Therefore, the trusted clock of the terminal becomes an indispensable condition in copyright use. [0004] In order to enable the terminal to obtain ...

AI Technical Summary

Problems solved by technology

[0005] The above method for synchronizing DRM terminal and server clock can realize clock synchronization, but has the following disadvantages: 1. It increases the burden on the server; in the case of a large number of terminals, if the server calculates the deviation by relying on the terminal to actively report, the server will It will consume a lot of resources to process and transmit data, which will affect the performance of the server; 2. There will be clock conflicts; if the terminal actively reports and the server calculates the deviation method, when a terminal registers with multiple servers, clock conflicts may occur Problem; 3. The offline synchronization of the terminal cannot be realized; when the clock synchronization is realized through the interaction between the terminal and the server, once the terminal is offline or does not actively interact with the server, the server cannot synchronize the terminal clock and cannot control the terminal behavior

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